On the Bitchū coast, apart from neighbouring Bizen, the Aoe smiths forged a tradition of their own — known for a distinctive dark sumihada jigane and slender, elegant tachi. Across three phases the line ran from the founding Ko-Aoe masters through the peak of Chū-Aoe and into the long Sue-Aoe twilight.
The The Bitchū Aoe School (青江), active 1100–1500 in Bitchū Province across 413 documented smiths: 5 Kokuhō (National Treasures), 38 Jūbun, 43 Jūbi, 55 Tokubetsu Jūyō, 223 Jūyō.
Phase 1 · Ko-Aoe (古青江) · 1100 – 1235
The Ko-Aoe school flourished in the lower basin of the Takahashi River in Bitchu Province, forging swords at the districts of Koi and Manju in a region long renowned as a source of iron. The school is traditionally held to have begun with Yasutsugu around the Joan era (1171-1175), and works produced from the end of the Heian period through approximately the mid-Kamakura period are distinguished as Ko-Aoe, with production continuing under the broader Aoe designation through the late Nanbokucho era. The representative smiths of this early lineage -- Yasutsugu, Moritsugu, Sadatsugu, Tsunetsugu, Kanetsugu, Toshitsugu, Suketsugu, Tametsugu, Shigetsugu, and Tsugutada among them -- share the character "tsugu" as a common element in their names, forming an unusually cohesive dynastic identity. A distinct sub-lineage, the Senoo group, stood apart from this main line: led by Masatsune and Yukizane, the Senoo smiths forged to the east toward Bizen and rarely incorporated the "tsugu" character. Sadatsugu was counted among the *goban-kaji* serving Retired Emperor Go-Toba, and the *Shinkan Hiden-sho* assigns the name the highest valuation among Aoe works: "Bitchu workmanship, the finest, fifteen kan."
The Ko-Aoe technical vocabulary is remarkably consistent across its many smiths. The *kitae* is built on *itame-hada* intermixed with *mokume*, the grain standing conspicuously to produce *chirimen-hada* -- the tightly compressed, crepe-like surface texture that is the school's most recognizable trait. Patches of *jifu* and *ji-madara* mottle the ground steel, while fine *ji-nie* adheres thickly with *chikei* interwoven; a dark-toned *sumi-hada* may appear amid the standing grain. *Utsuri* manifests in several forms across the school's corpus: *midare-utsuri*, *jifu-utsuri*, and in certain works by Tsunetsugu, tiered bands suggestive of *dan-utsuri*. The *hamon* is predominantly *suguha*-based, mixed with *ko-midare*, *ko-choji*, and *ko-gunome*; *ko-nie* adheres well, and fine *kinsuji* and *sunagashi* run through the hardened edge, while the *nioiguchi* characteristically tends toward *shizumi* -- a subdued, sinking quality -- or in certain smiths appears bright and clear. The *boshi* typically turns in *ko-maru*, sometimes with *hakikake*. Tang conventions provide critical diagnostic markers distinguishing Ko-Aoe from contemporary Ko-Bizen: bold *o-sujikai* file marks, deeply cut *machi*, and signatures placed on the *haki-ura* side in characteristically thick chisel work. The NBTHK consistently observes that compared with Bizen works of the same era, Ko-Aoe productions "convey a somewhat quieter and more subdued taste" -- the restrained, astringent *shibui* character that defines the school's aesthetic.
Yet within this disciplined restraint, individual members demonstrated striking range. Yasutsugu's most celebrated tachi -- transmitted as an heirloom of the Shimazu family and counted among the legendary *Tenka Goken* -- displays a flamboyant *midare-ba* of extraordinary vitality that rivals anything produced in the Bizen tradition, while Sadatsugu's finest works invite comparison with National Treasure-class examples. The later Osumi no Gon no Suke Sadatsugu developed a bold personal manner, broadening the *yakihaba*, concentrating nie to produce *shima-ba*-like scenery, and tempering the boshi with deep *kaeri* -- features that overflow with vigor. Kanetsugu is praised for almost no unevenness of workmanship across his corpus, while Moritoshi's forging is singled out as tighter and better refined than is typical even within this exacting school. The Senoo branch, represented by Masatsune and Yukizane, carried a flavor somewhat resembling Bizen work while maintaining the characteristic chirimen-hada and o-sujikai file marks that identify the hand as unmistakably Bitchu. Across its full productive span, the Ko-Aoe school stands as one of the foundational pillars of the Japanese sword tradition: a lineage whose refined *suguha* aesthetic, distinguished crepe-textured forging, and quietly astringent taste secured Bitchu swords their ancient reputation and continue to command the deepest respect in the study of classical swordsmithing.
Masatsune (正恒) — Mainline · 1213-1219. Kokuhō, Jūbi, Tokujū, Jūyō. Masatsune is a Ko-Aoe smith of Bicchū Province, working from the end of the Heian period into the early Kamakura, and the published sources name him the foremost figure of the Senoo smiths. They divide the old swordsmiths of Bicchū into two lineages, the Senoo smiths and the Aoe smiths, and place Masatsune at the head of the first. He descends from Noritaka and forged at Senoo, in a line the commentary holds apart from the main Aoe stream: he "formed a lineage separate from the main Ko-Aoe line, which frequently used the character Tsugu" (「次」の字を多く用いる古青江の主流派とは別に一派をなした). The *Meikan* enters the first-generation Ko-Aoe Masatsune in the Ken'ei era, yet extant blades descend no later than the close of the Heian period, so close in date to the Ko-Bizen Masatsune of the neighbouring province that the two are easily confused. A Tokubetsu Jūyō tachi states the point plainly, that this Masatsune belongs to a line distinct from the Ko-Aoe smiths who sign with Tsugu and that his workmanship differs from theirs.
His recognized hand is the quiet one. Over a slender tachi of high *koshizori* and pronounced *funbari* he tempers not the showy clove-flower expected of the mainstream Aoe but a calm *chū-suguha* or narrow *suguha*, into which *ko-midare* and small *ko-chōji* are mixed, with *ashi* and *yō* entering well and the *nioiguchi* drawn tight in *ko-nie*. The *bōshi* runs straight and turns back in a small *ko-maru*. This restraint is the whole character of the smith. The published sources read his work against the Ko-Bizen Masatsune it resembles and find his "somewhat plainer, with an astringent, subdued taste" (やや地味で渋さが感じられる). Where the school's later hands open into flamboyance, his stays close to the line, the activity carried in *ashi*, *yō*, and fine *sunagashi* and *kinsuji* rather than in towering heads of *chōji*.
The *jigane* is the other half of the recognition. He forges a *ko-itame* that stands a little and tends toward *masame*, with *ji-nie* and fine *chikei*, and through it run the speckled patches the published sources call *chirimen-hada*, the crepe-like Aoe *jigane*, often with areas of clear *sumihada* and a *jifu*-style or quiet irregular *utsuri*. It is this *jigane*, more than the temper, that separates him from his Bizen namesake, whose steel carries no such crepe of *jifu*. On one Jūyō tachi the commentary singles the *chirimen-hada* out as distinctive and the *bōshi* as splendid, and on another the grain rises in a fine, *chirichiri* manner, mixing clear steel into a crepe-like surface in the most characteristic Ko-Aoe way. The *ō-sujikai* file marks on his tangs are named, with the placement of his signature and the narrow *suguha*, among the notable points of his work, and they carry the attribution even where the *mei* has worn down to a single legible character.
His record divides cleanly in two. There are the signed tachi, several still *ubu* with the two-character *mei* near the tip of the tang, others shortened yet keeping the high curvature and *funbari* of an old blade, and there are the *ō-suriage mumei* katana attributed to him, originally slender tachi, judged by the same *chirimen* *jigane*, quiet *suguha* and *ko-maru* turnback. On one *mumei* katana the published sources name precisely the straight *bōshi* turning to *ko-maru* as the feature that marks Masatsune. The dating, though, the commentary leaves open: because several smiths within the line itself used the name and their signing manner differs blade to blade, and because extant works run earlier than the *Meikan*'s Ken'ei date, one signed tachi was designated as a blade merely "bearing a signature," the question deferred to future study.
What sets him apart, the judges name in his own terms. He is held back from the Ko-Bizen Masatsune by the crepe of his *jifu* and the clear *sumihada* of his *jigane*, and from the later, flamboyant Aoe by the deliberate calm of his *suguha*. The published sources call his work "archaic and deeply flavored" (古雅で味わい深い), preserving the refined elegance of the transitional late-Fujiwara to early-Kamakura form, and on one *ubu* signed tachi judge it "the most archaic in character among works of this name" (同名中でも就中、古調である). Beside Koreshige, Yasuiye, Hirotsune, Tsunemasa, Moritsune and Yukimasa of the same Senoo line, he stands as its representative, the one whose surviving works are not few and whose hand is the most clearly read.
For the collector he is a rare and quiet early name. His presence runs through the prewar Jūyō Bijutsuhin and the modern Jūyō and Tokubetsu Jūyō tiers, twenty blades in the two highest tiers and four of them Tokubetsu Jūyō, one a tachi that carries an early-Meiji *handachi* mounting fitted by Fuchikawa Kazunori. Fujishiro records no grade for him, and his blades survive in small number, several signed in original tang, which the published sources call "especially valuable for remaining *ubu* and signed" (生ぶ茎、有銘であることは特に貴重である), and one of which they name "one representative work of Ko-Aoe Masatsune" (古青江正恒の代表作の一本). His provenance reaches the imperial house: one *kodachi* was formerly held by the Arisugawa-no-miya princely family, and his other blades are preserved in long-held private hands and institutional collections of recorded whereabouts. Most are held rather than traded, and a signed Ko-Aoe Masatsune in original tang comes to light only seldom, so a privately held example is a notable thing for a collector to encounter, a document of how the old Bicchū tradition kept its quiet, archaic voice.
Yasutsugu (康次) — Mainline · 1211-1213. Kokuhō, Jūbun, Jūbi, Tokujū, Jūyō. Yasutsugu (康次) of Bitchū worked in the Ko-Aoe group in the early Kamakura period, around the Kenryaku era (about 1211 to 1213), and is transmitted in the *meikan* records as a son of Moritsugu. He is not the later Echizen Shintō Yasutsugu, whose name is written with different characters; he belongs instead to the old Aoe smiths who forged along the lower Takahashi river in the districts of Ko'i and Manju, the group the published sources count, from the late Heian period to about the middle of Kamakura, as Ko-Aoe. Among that group the NBTHK names him a representative smith, together with Moritsugu, Sadatsugu and Tsunetsugu. His standing rests on two very different kinds of work under one hand. The everyday Yasutsugu is restrained, what the published commentary on his usual manner calls "a small *midare-ba* in which the *ko-nie* adheres well"[[c:1]]. The famous Yasutsugu is the broad, flamboyant exception, of which the National Treasure tachi long held in the Shimazu family is the type.
His characteristic hand is the quiet one. Over a *shinogi-zukuri* tachi of high *koshizori* with strong *funbari* at the base, he tempers a *chū-suguha* very shallowly broken by *ko-midare*, *ko-chōji* and a little *ko-gunome*. The *nioiguchi* tends subdued and sunk, with fine *ko-nie* well attached, *ashi* and *yō* entering frequently and *kinsuji* playing here and there. The published sources describe this register as having, even within its plainness, a deep quiet elegance that shows the Ko-Aoe character, "a deep refinement within the subdued tone, presenting the characteristic Ko-Aoe flavor"[[c:2]]. Against the contemporary Bizen blades, the same commentary adds, the Aoe work reads "somewhat more restrained and austere in taste"[[c:3]]. A distinct sub-manner runs the *suguha* narrow, a *hoso-suguha* repeatedly overlaid with *yubashiri* in a *nijūba*-like effect, with the *ko-nie* again well attached.
The *jigane* is read first, for it carries the school. He forges *itame* mixed with *mokume*, the grain standing a little, taking on the crepe-silk *chirimen-hada* that is the Aoe *jigane*, with patchy *jifu* mixed in and clear *sumi-hada* appearing, the *ji-nie* fine and a faint *utsuri* sometimes rising. On the more worked blades the reflection clarifies into a distinct *midare-utsuri*. The *bōshi* runs *sugu* or *midare-komi* with a *ko-maru* return, sometimes almost *yakizume*. The signature is itself a kantei point and a school marker. Yasutsugu cuts a two-character *mei* low on the *haki-ura* of an *ō-sujikai* filed *nakago*, below the *mekugi-ana* and set toward the *mune*; the published record notes that placing the signature on the *haki-ura* is one of the things that "differs from Ko-Bizen and the like"[[c:4]]. The chisel is generally fine. As Honma observed of the school, "for Ko-Aoe, the chisel of Yasutsugu's signature is not excessively thick"[[c:5]], though on at least one shortened tachi the two characters are cut large with a thick chisel at the *nakago-jiri*, on the *haki-omote*.
The two registers sit within essentially one Ko-Aoe manner. The signed pieces are the restrained suguha and ko-midare, kept on *ubu* tangs with the two-character *mei*; the published commentary calls an *ubu*, signed tachi by this smith precious, since most of what survives is shortened. The mumei attributions hang on the second, flamboyant register: a wide *ko-midare* worked with *ko-chōji*, *ko-gunome* and small *tobiyaki*, the *habuchi* widening toward the *monouchi*, the *ha* full of *nie* with *kinsuji* and *sunagashi* running freely. The published sources are explicit that this is where his name is anchored, that as the Shimazu National Treasure exemplifies, "unusually for Ko-Aoe work, Yasutsugu can at times be seen producing flamboyant workmanship rich in activity"[[c:6]]に代表されるように古青江物としては珍らしく華やかで働きの多い出来), so that a mumei blade carrying that brilliance is reasonably specified to him. One Jūyō *katana*, greatly shortened, is attributed on exactly this reasoning, its broad notare-based temper rich in *tobiyaki* and reflection. The school itself the published sources place to about the middle of Kamakura as Ko-Aoe, after which it turns toward the *nioi*-based suguha and *saka-chōji* of its Nanbokuchō masters; Yasutsugu sits at the early core of that line, read in the same generation as Tsunetsugu, Tsugunao, Suketsugu and Kanetsugu.
What distinguishes him within his own group is read off his grounded traits, not by borrowing another smith's. The crepe-silk *chirimen-hada* with its *jifu* and *sumi-hada* is the Aoe ji that the published commentary names a principal point of interest of the tradition, and Yasutsugu shows it conspicuously; the subdued, sunk *nioiguchi* over fine *ko-nie* is his calm temper; and the *haki-ura* two-character signature in a fine chisel is the placement and hand by which his own blades are told. His masterwork sets the upper bound of the whole group. Of the Shimazu tachi the published sources write that its *midare-ba* is "of a workmanship without parallel as Ko-Aoe, flamboyant"[[c:7]], a blade "ranked among the Tenka Go-ken, the long heirloom tachi of the Shimazu family"[[c:8]] alongside the Dōjigiri Yasutsuna and the Ō-Denta. That a single early Aoe smith stands at once for the quiet base of the group and for its most celebrated exception is the whole of his standing.
Yasutsugu is *Jō saku* in Fujishiro's grading, with a *Tōkō Taikan* valuation near the top of the old smiths. The weight of designation behind his name is real but narrow: one National Treasure, one Important Cultural Property, one Important Art Object alongside a second of the same, one Tokubetsu Jūyō and four Jūyō, five blades across the Tokubetsu Jūyō and Jūyō tiers. The provenance recorded against his work is distinguished, seven blades carrying a history through the Shimazu of the National Treasure tachi, the Kuroda of Chikuzen who held the imposing Tokubetsu Jūyō *ubu* tachi, the Kikkawa and Yamauchi houses, the Imperial Family, and the Ōkura collections, his Important Art Object passing from the Ōkura Shūkokan to the Ōkura Cultural Foundation. Of recorded whereabouts two of his blades are held by public institutions, the Tokyo National Museum and the Ōkura Museum of Art, the rest in long-held private hands. His National Treasure and Important Cultural Property are patrimony, preserved and never traded; the few designated blades in private hands come to market only rarely, and a signed, *ubu* tachi by him is among the scarcer things an early-Kamakura collector could encounter.
Kanetsugu (包次) — Mainline · 1211-1213. Jūbun, Jūbi, Tokujū, Jūyō. Kanetsugu (包次) is one of the best-known smiths of Ko-Aoe, the early stratum of the Aoe school of Bitchu Province, which the published sources trace to Yasutsugu around the Joan era (1171-1175). Works no later than roughly the middle of Kamakura are set apart under the name Ko-Aoe, and Kanetsugu is counted among its representative hands beside Moritsugu, Tametsugu, Tsugie, Tsugatada, Sadatsugu, Yasutsugu, Tsunetsugu, Toshitsugu, Suketsugu and Shigetsugu, most of whom carry the character 'tsugu'[[c:1]] as the common element of their names. The reference works place him in the line descending from Sadatsugu[[c:2]]; the older compendia name him a son of Moritsugu or of Sadatsugu[[c:3]]. He worked from the end of Heian into the early to middle Kamakura, before the slanting saka-choji idiom that would later define the flamboyant Aoe of Nanbokucho. Among Ko-Aoe smiths a comparatively large number of his works survive[[c:4]], so that his is one of the clearest signed records of the school's quiet early manner.
His is the restrained pole of Aoe. The temper is a suguha base carrying small undulations and small clove (直刃 with 小乱れ and 小丁子), with ko-nie well-adhering, hada-karami within the ha and sunagashi (砂流し) interwoven, the boshi straight turning back in ko-maru (小丸). The published descriptions praise the consistency of his hand above its drama: in his swordmaking there is, they write, almost no unevenness, and many examples are of fine quality[[c:5]]. The Tokubetsu Juyo tachi, deep in curvature, carries small midare with ko-choji over a chirimen forging mixed with sumi-hada and a kijimomo tang with bold o-sujikai file marks; in all respects, the notes conclude, it fully manifests the characteristic features of this school and smith, leaving nothing to be desired[[c:6]]. On a slender, ko-kissaki tachi of archaic and elegant form[[c:7]] the suguha runs narrow, tending to hotsure (ほつれ), with nijuba-like yubashiri (二重刃) and kinsuji (金筋) crossing both ji and ha.
The jigane is the school's own: itame mixed with mokume (板目 with 杢), standing somewhat in a fine, granular texture the references call chirimen (縮緬肌), with ji-nie applied and clear patches of sumi-hada (澄肌) in the ji. The published commentary makes this the school's tell, the mokume prominent and the surface slightly standing, often called crepe-like, with patches of jifu (地斑) mixed in, the tempering ranging from quiet suguha to small irregularity. Against the Bizen tradition the judges draw the distinction by feel: compared with contemporary Bizen work the overall impression, they write, is somewhat more subdued and astringent in savor[[c:8]]. The reflection in the ji is the quiet Bizen-kindred utsuri rather than the bright midare-utsuri of Ichimonji: on the Owari Tokugawa tachi the itame stands, mixed with mokume and sumi-hada, with a suggestion of utsuri[[c:9]], while on his finest pieces the reflection rises vivid.
One coherent Ko-Aoe hand is read across two registers rather than across periods, the default the quiet signed tachi above, a suguha to ko-midare. On the connoisseur pieces the ji speaks louder: the Juyo tachi of 2003 is forged in ko-itame with ko-mokume, overall fine yet standing, with dust-fine ji-nie thickly applied, fine chikei (地景) interwoven, patch-like jifu in places and a vivid midare reflection (乱れ映り) standing out, its temper a suguha base with a small gunome feeling (小互の目), the nioiguchi (匂口) tight and tending to subdue. The judges single this blade out as more thoroughly refined in its forging than is usual even within the school[[c:10]], and, since it signs on the omote like the Itsukushima tachi, hold it of high documentary value for the study of the smith[[c:11]]. The kinzogan-attributed katana shows the same register from the other side: clear patchy reflection (地斑映り), a bright nioiguchi, ko-gunome with small notare (小のたれ). Here the attribution is upheld from the work itself, the published commentary noting that the small notare in the hardened edge is a trait found in Kanetsugu's signed pieces[[c:12]], so that the tradition of attribution to this smith is entirely appropriate[[c:13]]. Aoe signatures, the references add, are cut boldly even on tachi as two-character mei (二字銘) on the ura in the manner of katana-mei.
Kanetsugu's place within Aoe is defined as much by what he is not as by what he is. He stands at the early, quiet pole of the school, before the slanting saka-choji and saka-ashi the later Aoe masters of Nanbokucho made their signature; that slant is absent from his work, and the calm small midare on a suguha base is the early register it would later displace. His sumi-hada and chirimen jihada are the school ji shared with the wider Aoe line, while his quiet suguha and the consistency of his hand mark him within it. The judges set Ko-Aoe apart from Ko-Bizen by feel and by craft, the bold two-character mei on the ura and the o-sujikai file marks among the points of difference they name[[c:14]]. No individual pupil is recorded. The compendia treat the Kanetsugu name as transmitted from the early through the late Kamakura period, so the signed mei spans more than one generation, the surviving signed and gold-inlaid work treated as one transmitted hand rather than split among them.
He is graded Jo-jo saku by Fujishiro and rated 1,500 in the Toko Taikan. The weight of designation behind his name far exceeds the size of his surviving record: four of his blades are Important Cultural Properties, with one at Tokubetsu Juyo and three at Juyo beneath them, so that the Tokubetsu Juyo and Juyo tiers together hold four. Eight of the surviving blades are signed, none unsigned, an unusually clean record for so early a smith. The traceable holders run to long-held patrimony rather than the market. A signed tachi at Itsukushima Shrine (厳島神社) is an Important Cultural Property, the rare exception in carrying its mei on the omote where Ko-Aoe generally signs on the ura. Another signed tachi descended in the Owari Tokugawa house, was certified Juyo Bijutsuhin in 1939, and is held by the Tokugawa Reimeikai Foundation and the Tokugawa Art Museum. The gold-inlaid katana survives with two large kirikomi (切り込み) struck into its edge, by which the published commentary recalls its martial use[[c:15]]. For a private collector the Important Cultural Properties are heritage, held in shrine and long-private collections and never to trade; of his Tokubetsu Juyo and Juyo blades a handful are on record, and one comes to open hands only rarely, a landmark of early Bitchu work when it does.
Tsunetsugu (恒次) — Mainline · 1207-1211. Jūbun, Jūbi, Tokujū, Jūyō. Tsunetsugu is one of the representative smiths of the Ko-Aoe school of Bitchu, the older Aoe that forged along the lower Takahashi river in a province the records praise for its swords from the close of the Heian period. The published sources name him plainly: "Tsunetsugu is a representative smith of Ko-Aoe"[[c:1]], held by one tradition to be the son of Moritsugu and the younger brother of Sadatsugu, and counted, the same commentary writes, "together with Sadatsugu and Tsugiie among the ban-kaji of the Retired Emperor Go-Toba"[[c:2]]. The name is not that of a single hand. Judging from the manner of signing, the NBTHK reckons there were "two or three of the same name within Ko-Aoe"[[c:3]], and elsewhere that "several smiths worked through the Kamakura period"[[c:4]] under it, so the published record treats Tsunetsugu as a representative name carried as a mainstay of the Aoe forge from the opening of Kamakura down into the Nanbokucho, rather than as one biography. Among the Tsunetsugu-name *meibutsu* stands the Juzumaru, one of the Tenka-Goken, famous as the protective *tachi* of the priest Nichiren, and the published commentary notes that this raises the name higher still.
His is the calmest *suguha* of the early Aoe hands. The signed *tachi* read on one consistent manner: a *suguha*-based *ha* that the published sources describe as "a suguha tone running shallow with a moist tendency"[[c:5]], faintly undulating, with *ko-midare* and at times *ko-choji* mixed in. *Ashi* and *yo* run into it constantly, and the *nie* is strong and well laid, with *sunagashi* sweeping through and *kinsuji* appearing in places. The *boshi* answers the temper, going straight and turning back in a small *ko-maru*. It is a quiet, even temper, the least flamboyant of the Aoe quartet, and its discipline is the first thing that marks his hand: where the Aoe brethren let the *midare* run, his stays close to the line, the activity carried inside it as *ashi*, *yo* and the occasional *ko-choji* rather than along its crest.
The *jigane* is the Bitchu steel, and the published record dwells on it: of one signed *tachi* the NBTHK writes that, the activity within the *ha* aside, "the jigane in particular is splendid"[[c:6]]. It is a *ko-itame* that stands a little, mixed with *mokume*, working up to the crepe-like surface the sources call *chirimen* (the same *tachi* is recorded as "showing a chirimen tendency", 縮緬風を呈し). Fine *ji-nie* gathers across it and *chikei* enter. On many blades the iron is broken by *jifu* and the clear patches the school knew as *sumihada*, and a faint *utsuri* rises in it, on the *o-suriage* pieces a *nie-utsuri* and, on the broader late work, *utsuri* standing in streaks toward the *shinogi*. A reverse tendency surfaces on a minority of blades, *saka-ashi* and even *saka-choji* mixed on the *ura*, a within-school tell that runs quieter in him than in his Aoe brethren. The whole is the speckled, deeply flavored *jigane* the NBTHK calls Aoe character, "quiet in tone, yet possessed of deep interest and savor"[[c:7]].
The work falls into two registers that the published descriptions keep distinct. The first is the signed core: comparatively small *ubu* or lightly shortened *tachi* in *shinogi-zukuri* with *koshizori* and a *ko-kissaki*, carrying a thick-chiseled two-character signature, the chisel-work so heavy the NBTHK calls strokes of this boldness rare. The placement is itself a kantei point, for the published commentary records that the signature falls now on the *haki-omote*, now on the *haki-ura*, and observes by way of reference that within Ko-Aoe the line descending from Masatsune signs *tachi-mei* on the front while the Sadatsugu group cuts to the back. The second register is the *o-suriage mumei* and *shu-mei* work attributed to the name, read as later Tsunetsugu: a *katana* bearing a red-lacquer "Aoe Tsunetsugu" attribution beside a Kanbun-era Hon'ami Kotsune *origami*, and the two unsigned *Juyo Bijutsuhin* blades, one judged late Kamakura, one Nanbokucho Aoe, which mark the later end of the line. Against this the NBTHK is candid that the multiplicity of hands leaves questions: of one signed *tachi* it allows that there is "some doubt regarding the inscription, leaving room for further study".
The published sources are equally careful to keep him apart from his homonyms. The same commentary that praises his *jigane* notes that "the name is found among the Ko-Bizen group as well"[[c:8]], both reckoned skilled, and the appraisal of the Ko-Aoe pieces is steadied by their own evidence rather than by the name alone: the *o-sujikai* file marks the NBTHK calls the prescribed Aoe convention, the bold thick-chiseled two characters, the speckled *jifu* and *sumihada* in the *ji*, and the disciplined *suguha* with its reverse-tending *ashi*. His tachi are placed against the wider Aoe field by these grounded marks, not by contrast with another school: the calm of his temper, the crepe-like Bitchu *jigane* and the bold signature set his Ko-Aoe work apart, and the records read the same hand across the early Kamakura to Nanbokucho span the name covers.
Fujishiro grades Tsunetsugu *Jo-jo saku*, and the Toko Taikan values his work among the upper rank of the early Aoe names. The designations behind the name sit high: one of his *tachi* is Tokubetsu Juyo, with seven at Juyo, three Important Cultural Properties, and two prewar Juyo Bijutsuhin among the unsigned work. No blade under the code is a National Treasure, so the patrimony preserved in trust is the three Important Cultural Properties, while the tradeable standing rests on that Tokubetsu Juyo and the Juyo tier. The provenance roll is notable for so old a name: blades carry histories through the Kishu Tokugawa family, the Uesugi family, the Tsuchiya family, the Arima family, and the Imperial Family down to the Emperor Meiji, and the Hon'ami Kotsune *origami* of Kanbun 8 fixes the *shu-mei* katana's appraisal in the seventeenth century. Of recorded whereabouts a handful are held in public institutions and a shrine, with others in long-private hands. A signed Ko-Aoe Tsunetsugu reaches the market only rarely; when one of the Tokubetsu Juyo or Juyo blades does appear it is a landmark for the collector of the older Bitchu schools, encountered with patience rather than sought, and the Juzumaru itself, a designated cultural property held in trust, is never among them.
Moritoshi (守利) — Mainline · 1224-1225. Kokuhō, Jūbun, Tokujū, Jūyō. Moritoshi is a smith of the Ko-Aoe, the early Bicchū line that forged along the lower Takahashi River around the estates of Koi and Manju, working from the end of the Heian period into the early Kamakura, dated by the swordbooks to about the Gen'nin era of 1224. The published sources give him a leading place in that line, naming him "together with Yasutsugu, Sadatsugu and Tsunetsugu one of the representative smiths of Ko-Aoe"[[c:1]]. A National Treasure tachi carries his two-character signature, and the Important Cultural Properties and the higher modern ranks carry it again, yet extant signed works are few; his record is almost wholly the signed tachi, several still in their original tang, and the foundation of what is known about him.
His characteristic hand is a quiet one. Over an *itame* mixed with *mokume*, often a *ko-itame* that stands a little so the published sources call it finely *hada-dachi*, he lays a *suguha* base into which *ko-midare*, *ko-chōji* and small *gunome* enter, with occasional angular *ha*; *ashi* and *yō* enter well, *ko-nie* adheres, and fine *kinsuji* and *sunagashi* run through. The temper is not the flamboyant clove-flower of the contemporary Bizen but a calm, small irregular line, and on the plainer pieces the *nioiguchi* tends toward *shizumi*, a subdued, settled feeling. The published sources read the whole as resembling the neighbouring Ko-Bizen and yet, "compared with Ko-Bizen, somewhat more restrained, yet possessing a distinctive, astringent flavor"[[c:2]].
The *jigane* is where his school speaks most clearly. The forging stands a little and turns blackish in tone, taking on the crepe-like *chirimen-hada* of the old Bicchū steel; dense fine *ji-nie* adheres, *chikei* enter frequently, and through the surface run the speckled *jifu* and patches of clear *sumihada*. In the darker bands an irregular *jifu-utsuri* stands out, and on the finest blades a *mizukage* rises at the *machi*. His is the speckled, sober reflection of Aoe rather than a clear bright one, and the published sources treat this *jigane*, standing and crepe-like, as the very thing that separates his work from the Ko-Bizen it otherwise recalls. The *bōshi* runs straight to a small *ko-maru*, at times with a little *hakikake*.
His work survives in essentially one register, the signed tachi, in width from slender to broad and finishing in a *ko-kissaki* or compact *chū-kissaki*, with high *koshizori* and strong *funbari*; one *ubu kodachi* survives, signed and carrying a *bonji* at the *koshimoto*. Within that one manner the published sources mark a top group. On the finest signed tachi and the *kodachi* the forging is, in their words, "more refined than is ordinary for the school"[[c:3]], the *ji-nie* densely and thickly applied, both *ji* and *ha* richly worked, the *suguha* deep in *nioi* and thick in *nie* rather than subdued; one such Tokubetsu Jūyō tachi is called a work of outstanding (*shushoku*) level, broad and bold in shape and sound in condition. The tang preserves the school's habits: *ō-sujikai* file marks, the signature cut on the *ha-ura*, and the smith's own chisel tell, the character 利 set a little closer to the *mune* than 守.
What sets him apart from his neighbours the judges name directly. A Bizen line also signed Moritoshi, but a Kanagawa tachi is appraised thus: "although there are smiths in Bizen who used the same signature, this work is judged the Moritoshi of Ko-Aoe"[[c:4]], and the basis is exactly his own traits, the standing *chirimen-hada*, the quiet *suguha* with its *shizumi*-toned *nioiguchi*, the *ō-sujikai* file marks and the *ha-ura* signature. His bright *chikei* and speckled *jifu-utsuri* over a subdued *suguha* place him within Ko-Aoe beside Yasutsugu, Sadatsugu and Tsunetsugu, and his quiet manner marks him out from the showier Bizen of the same years; the published sources hold his blades to demonstrate the points of appreciation of the school plainly, one Tokubetsu Jūyō tachi singled out as a piece in which "the characteristic features of Ko-Aoe are well shown."
For the collector he is a rare early name, graded Jō saku by Fujishiro. His finest blade is a National Treasure, held with the Important Cultural Properties and the Tokubetsu Jūyō and Jūyō ranks as patrimony rather than as anything that trades; the National Treasure tachi descends through the Kitsuka, Ōkōchi and Kikkawa families, and his blades are preserved in long-held collections and institutions with their own documented provenance, among them Atsuta Jingū and the Seikadō Bunko, with one tachi carrying a temple provenance to Rendaiji. Only a small number fall in the Tokubetsu Jūyō and Jūyō tiers, perhaps eight designated works on record beyond the protected pieces, and the published sources call surviving signed examples rare, an *ubu* and signed blade "valuable as reference material even among this smith's now-scarce works." A privately held signed Ko-Aoe Moritoshi comes to light only seldom, and to encounter one is a notable thing, a quiet document of how Bicchū forged beside the more brilliant Bizen.
Tametsugu (爲次) — Mainline · 1243-1247. Kokuhō, Jūbi, Jūyō. Tametsugu is a Ko-Aoe smith of Bicchu working in the early Kamakura period, and his name carries one of the celebrated objects of the whole tradition: the National Treasure tachi known as Kitsunegasaki, transmitted in the Kikkawa family. He is the maker the published sources reach for when they describe the early Bicchu manner, the steel of the province before the main Aoe line settled into the look the later centuries made famous. The records place him close in time to the Ko-Bizen smiths of the same generation, the *meikan* transmitting him as a son of Moritsugu active around the Jogen era, his extant work descending no later than the end of the Heian period into the early Kamakura. With Hira-Aoe and the great mid-Kamakura Aoe still ahead of him, he stands among the first hands whose blades let the school be recognized at all.
His recognized work is the slender signed tachi, several still in their original tang with the two-character mei cut on the *ha-ura*, high in *koshizori* with strong *funbari* and a small or medium point, one keeping the *kiji-momo* tang of an old blade. The tell of the hand is the *jigane*. Over an *itame* mixed with *mokume* that stands a little and carries *ji-nie*, the published sources find the speckled *chirimen-hada* of the Aoe *jigane*, patches of clear *sumihada*, and a quiet suggestion of *utsuri*. On more than one blade the description runs almost word for word, the forging becoming *chirimen-hada*, *sumihada* mixed in, an impression of reflection across the surface, and it is this crepe-like, clear-steeled *jigane*, rather than the temper, that the judges name as the school's mark on his blades.
Upon that *jigane* the temper divides in two, and the division is the spine of his record. The earliest blade, the one the sources call the oldest of the group and the nearest to the Kitsunegasaki, wears a deliberately calm hand: a *ko-nie suguha* into which *ko-midare* is mixed, *ashi* entering, the *nioiguchi* on a companion piece overall subdued, the *boshi* running straight to a *ko-maru* above a tang filed in *o-sujikai*. The later group, set a little after the National Treasure because the signature is cut in larger characters, is broader in the body and more vigorous in the *ha*: a *nie-deki ko-midare* gathering *choji*, in one Juyo blade returning in places to a *suguha* base with *ashi* well in and the edge full of *nie*, *hotsure*, *sunagashi* and *kinsuji*, in a Jubi blade widening at the center into a large *midare*. The published commentary calls this manner forceful and full of spirit, and the *boshi* there finishes not in a round but in *yakizume*.
The central question around him is one the sources refuse to close, and it is more interesting than any single feature. Examining the three Important Art Object tachi together, the judges hold all three to be Ko-Aoe yet write that 'they cannot at once be declared the work of the same hand'[[c:1]], that the oldest of them is the most archaic, and even of that one that 'it cannot be decisively identified with the celebrated National Treasure Kitsunegasaki Tametsugu'[[c:2]]. The manner of the signature differs blade to blade; the workmanship shades from the quiet early *suguha* to the later, showier *ko-midare*. Whether one smith changed across a working life or several smiths shared the name is left, in the institution's own words, to further study, which is exactly why the *ubu*, signed pieces are prized as documentary material for the school.
What sets him apart he shares with no neighbour in quite the same combination. Against the plainer *itame* of the Ko-Bizen smiths of the same years, his is the *chirimen-hada* *jigane* with *sumihada* and a suggestion of *utsuri*; against the flamboyant *choji-midare* the main Aoe line would later make its signature, his earliest hand is a quiet *suguha*. The published sources affirm his blades from precisely these two things, writing that 'the *jigane* and *hamon* clearly display the characteristic features of the Ko-Aoe group'[[c:3]] and that 'the archaic manner of workmanship is not later than the early Kamakura period'[[c:4]]. He is read, in short, by the old Bicchu steel and the calm of the early edge, the school caught at its beginning.
For the collector he is, before anything else, the maker of a National Treasure, and that fixes the terms. Fujishiro grades him Jo-jo saku. The Kitsunegasaki, the *go* tachi long held by the Kikkawa house and now in the Kikkawa Historical Museum, is patrimony preserved, not a thing that trades; the published sources call it a sword that predates Shoji 2. Beyond it his record is small and largely held: signed tachi reaching the prewar Juyo Bijutsuhin and, in the modern era, only a pair at Juyo, one passing through Iwasaki Koyata to the Seikado Bunko, one through Ninomiya Kojun to the Sano Art Museum, another formerly with Matsumoto Kenjiro. With a single locked National Treasure and only a handful of designated blades on record, a signed Ko-Aoe Tametsugu of recorded whereabouts is a rare thing to meet; one comes to light only seldom, and a privately held example would be, for a collector of early work, among the more memorable things to encounter, a document of how the Bicchu school began.
Suketsugu (助次) — Mainline · 1261-1264. Jūbi, Tokujū, Jūyō. Suketsugu of the Ko-Aoe school in Bitchū worked in the early Kamakura period and is transmitted as the son of Toshitsugu, one of the representative smiths of the Aoe group in its old phase. The name then ran through several generations to the end of Kamakura, a later bearer leaving a Shōwa-era date and the long signature reading Bitchū-no-kuni Masu-no-Higashi-no-shō Aoe Suketsugu saku[[c:1]]. Against that descent, the published sources fix the surviving works of this signature manner as the earliest of the name: by the *Meikan* there were three Suketsugu active in the Kamakura period, and of the works extant 「現存するものの中では最も時代の古いもの」[[c:2]] is what the judges call this hand. He works the quiet Ko-Aoe suguha, his tachi slender to standard in build with a high *koshizori*, *funbari* standing and a *ko-kissaki* or *chū-kissaki*; a *kodachi* and a *ken* survive in his hand, and one *ō-suriage mumei katana* is attributed to him.
His characteristic hand is a *chū-* or *hoso-suguha*, very shallowly undulating in *notare*, broken by a little *ko-gunome* with *ko-chōji* and *ko-midare* mixed in. *Ko-ashi*, *saka-ashi* and *yō* enter, *ko-nie* adheres well and the *nioiguchi* draws tight, with fine *kinsuji* and *sunagashi* playing and *kuichigaiba* or *hotsure* at the edge here and there. The *bōshi* runs straight and turns in a small *ko-maru*, at times lightly brushed with *hakikake* or tending faintly to point. The suguha base is the constant of his work, and what distinguishes him within the school is the degree to which that base is interrupted by *ko-gunome*, a little *ko-chōji* and *ko-midare* mixing with it. The *Aoe* slant, the *saka-ashi* and *saka*-tending elements that mark his fellows, is the muted side of him: where *saka* enters at all, it rides quietly on the *ko-gunome*. His is the calmest and least slanting of the named Ko-Aoe suguha.
The forging is a *ko-itame* mixing *mokume*, here and there running into *masame* and standing a little overall, with *ji-nie* attached and fine *chikei* entering. *Jifu* mixes into it and clear *sumihada* shows, the steel taking on the crepe-silk *chirimen-hada* the school is known for, the color tending slightly dark, and a faint, sometimes *dan*-like *utsuri* rising. The published sources generalize this base for the whole group and for him in turn: the smiths of this Ko-Aoe generation worked a forging in which *mokume* stands out and the *hada* tends to rise into 「いわゆる縮緬状の肌合」[[c:3]], with *jifu* often mixing in, over which they tempered either a calm suguha or a suguha broken by small *midare*, the *nie* generally well attached, the whole conveying, against the Bizen work of the same period, a quieter and more subdued flavor. *Horimono*, where present, are *bō-hi* run *kaki-nagashi* or carried through *kaki-tōshi*.
The signature is the school's own and the point the judges name. On the *haura*, the worn-inward face of the *nakago*, below the *mekugi-ana* and near the tang tip, he cuts a bold, large two-character *mei* with a thick chisel, the strokes deeply struck, paired with the steep *ō-sujikai* filing. The published sources read the date off the cutting: 「助次は同名数代あるが、この銘振のものが古い」[[c:4]], the bolder cursive forms being the earlier, while later hands keep the thick chisel but square the calligraphy toward *kaisho*. Within his work the judges set two registers. The rule is the quiet suguha above, the calm composition that 「同派の典型的且つ代表的な太刀」[[c:5]] displays. Against it stands a single flamboyant outlier: a Tokubetsu-Jūyō tachi on which, 「同派の常と相違して焼幅広く」[[c:6]], the temper hardens wide with *chōji*, *gunome* and *togariba*, *tobiyaki* and *hotsure* entering, the *bōshi* running wet and brushing into a flame. For this manner the judges point to 「国宝に指定されている島津家伝来の康次の太刀」[[c:7]], the Yasutsugu tachi handed down in the Shimazu house and designated a kokuhō, and call the blade a precious work showing one stylistic mode within Ko-Aoe.
What the published sources note plainly is that the individuality of the man himself is slight, the manner of the school standing forward more than the hand: even a representative tachi is praised yet marked as 「助次の個性に乏しい憾がある」[[c:8]]. The same restraint they read as a virtue, calling the work old and elegant, the quiet suguha showing well over a dignified stance, the *ji* and *ha* healthy and rich in quiet flavor. He sits at the early-Kamakura core of Ko-Aoe, named together with Moritsugu, Tametsugu, Tsuguie, Tsugutada, Sadatsugu, Yasutsugu, Kanetsugu, Tsunetsugu and his father Toshitsugu, most of them sharing the character *tsugu* as the family element. His quiet ko-gunome-broken suguha stands just upstream of the school's later turn toward the nioi-based suguha and slanting chōji-midare of its Nanbokuchō masters such as Naotsugu and Yoshitsugu. The judges name the school's tang evidence as the proof of the place: that the Ko-Aoe smiths cut the *mei* on the *haura* and file in steep *ō-sujikai* is a point of difference from Ko-Bizen and the like, and on his tang it is kept sharp and plain.
Fujishiro grades him *Jō-saku*. The weight of designation behind his name is substantial for so quiet a Ko-Aoe hand: four of his blades reach the Tokubetsu-Jūyō tier and a further nine the Jūyō, thirteen in the Tokubetsu-Jūyō and Jūyō tiers together, with two more on the prewar Jūyō-Bijutsuhin roll. Almost all are signed tachi; the surviving *ken* in his hand the published sources call 「古青江助次の現存稀な剣の作例は貴重であり、資料的価値も頗る高い」[[c:9]], the school's old steel showing fine *masame* near the edge with *ji-nie* thickly attached, *kuichigaiba* and *yubashiri* giving the *ji* and *ha* conspicuous activity. The recorded provenance is thin but real. One *kodachi* on the Jūyō-Bijutsuhin roll passed through Sugiyama Shigemaru, who held it with a Jūyō-Bunkazai Moritsugu tachi and *daishō* mountings before presenting it to Amiya, and was recorded with Ogura Yōkichi of Tokyo; the *ō-suriage mumei* attribution was recorded with Maeda Toshinari. Current whereabouts are partial: of those on record his blades are held by the Tokugawa Art Museum, the Hayashibara Museum of Art and Itsukushima Jinja, with the rest in private hands. A signed Ko-Aoe Suketsugu is not wholly beyond reach, since his blades trade within the Jūyō and Tokubetsu-Jūyō tiers; but most designated work is held rather than offered, and an example of the calmest old Aoe suguha comes to a private collector only rarely, and with patience.
Sadatsugu (貞次) — Mainline · 1184-1185. Kokuhō, Jūbun, Tokujū, Jūyō. Sadatsugu worked in Bitchū from the early Kamakura period, one of the representative smiths of the Ko-Aoe school that forged along the lower Takahashi River in the districts of Ko'i and Manju, where the province's iron had long been worked. The published sources name him beside Moritsugu, Yasutsugu and Tsunetsugu among the leading Ko-Aoe hands, all of them sharing the character *tsugu* that runs through the line. He is remembered, too, in an older tradition: since the *Kanchiin-bon Meizukushi* he has been counted, in the published record's words, among the swordsmiths in monthly attendance on the retired sovereign Go-Toba In, one of the *ban-kaji* (「後鳥羽院番鍛冶の一人に」)[[c:1]]. Which Sadatsugu of the several who bore the name was that earliest smith is a question the sources leave open, but the standing of the name is not in doubt: the published commentary holds him to be, in its phrase, particularly skilled within the school (「一派の中でも特に技量の高いことで知られている」)[[c:2]], and notes in the same breath that his signed work survives only in a handful, a few pieces that can be counted on the fingers.
His recognized hand is the slender tachi, *shinogi-zukuri* with *iori-mune*, mostly shortened in later centuries yet keeping a high *koshizori* and a compact *ko-kissaki*, the archaic dignity of an old court tachi. The *jigane* is the constant and the tell. Over a well-packed *ko-itame* mixed with *mokume*, the steel stands a little into the crepe-like texture the school is known for, the so-called *chirimen-hada*, with *ji-nie* adhering well, fine *chikei*, and patches of *jifu* in the *ji*. The published sources fix on exactly this, calling the *chirimen-hada* the mark of the school on his work (「縮緬肌にこの派の特色を見せ」)[[c:3]]. It is the feature that separates him from the Ko-Bizen smiths whose work his otherwise resembles, the Bitchū steel showing its own grain where the neighbouring province runs cleaner.
Over that *jigane* the temper stays comparatively calm. A *suguha*-toned base carries a *ko-midare* into which *ko-chōji*, *ko-gunome*, *gunome* and a touch of *chōji* enter, with *ashi* and *yō* well in, *ko-nie* gathering thickly, and *sunagashi* and *kinsuji* running through. On the finest of his Jūyō tachi the *nioiguchi* turns bright, *nijūba* and *yubashiri* spilling into the *ji*, while another keeps the line low and quiet. The *bōshi* runs straight and turns back in a round or large-round on the *omote* and a small-round on the *ura*, often with a little *hakikake*. This is the Aoe character the published sources describe at length: set against contemporary Bizen, the work shows, in their words, a somewhat plain and astringent taste (「同時代の備前物に比べると幾分地味で渋い味わい」)[[c:4]], the *nie* well formed but the whole register held back from the open clove-flower flamboyance of the great Bizen ateliers.
The nakago carries the rest of the signature. Sadatsugu and the Ko-Aoe smiths cut the *mei* on the *ha-ura*, the side worn inward, and finish the tang in steeply slanted *ō-sujikai* file marks, both points by which, the published sources note, the school differs from Ko-Bizen and its kin (「銘を佩裏に切るのも古備前などとは相違」)[[c:5]]. His own two-character signatures are cut with a fine or a thick chisel and carry the reverse-chisel strokes the commentary singles out as characteristic. The convention is firm enough that its exceptions are worth recording: one Jūyō tachi is, in the published record's phrase, an exceptionally rare example in which Sadatsugu cut his authentic signature on the obverse (「佩表に銘をきった極めて珍しい作例」)[[c:6]], differing a little in nuance from his usual hand. Such variation, and the differing signatures across the few surviving blades, belong to the larger problem of how many smiths bore the name and over how long, a matter the sources hand on to further study.
What sets the Ko-Aoe Sadatsugu apart from his neighbours is exactly what the judges name. He is held apart from the Bizen mainstream by the quiet of his temper and the crepe of his *jigane*, his *ko-midare* and *ko-chōji* riding a *suguha* base rather than mounting into the towering clove clusters of Ichimonji or Osafune. He is held apart from the plainer old Bitchū work, in turn, by the level of his skill and the brightness of the *nie* his best blades carry. The published sources place his finest signed tachi in direct relation to the summit of the name, observing that it closely resembles the National Treasure Sadatsugu (「国宝貞次の太刀に類似」)[[c:7]], the tachi long transmitted in the Sō family of Tsushima. He stands, in short, at the high end of his own line, the calm and astringent answer that Bitchū gave to the splendour of Kamakura Bizen.
For the collector he is a rare early name, graded Jō-jō saku by Fujishiro. His record is crowned by that National Treasure tachi and includes work designated Important Cultural Property, with several signed pieces papered to the Tokubetsu Jūyō and Jūyō ranks. These higher blades are patrimony, held in museums and long-kept collections grounded in their own provenance, among them the Sano Art Museum and the Aomori City Museum, with one tachi recorded in the Taigarasu family. Of the surviving signed Sadatsugu, the published commentary speaks plainly: extant works are extremely few, and one Jūyō tachi is called, within so rare a signed corpus, valuable also as reference material (「在銘稀な同作中」), one of them indeed the most precious single key (「最も貴重な一本」) to the unresolved question of the *ban-kaji* smith. Only a small number fall in the Tokubetsu Jūyō and Jūyō tiers, so a signed Ko-Aoe Sadatsugu comes to light only seldom, with patience and at the very top of the market; a privately held example is a notable thing for a collector to encounter, a document of how Bitchū answered Bizen in the first age of the Japanese sword.
Sadatsugu (貞次) — Mainline · 1225-1227. Jūbun, Jūyō. Sadatsugu is an Aoe smith of Bicchu, working in the lower basin of the Takahashi River whose iron had been famous since the early-eleventh-century *Shin Sarugakki* listed "the swords of Bicchu" among the notable products of the provinces. The published sources call him "a representative smith of the Aoe forges"[[c:1]], placing him with the *tsugu*-signing masters of the line, a name that was carried on within the school down into the Nanbokuchō period. They are equally clear about the difficulty he presents: among works bearing the name there are signatures cut in a small manner, in an ordinary proportion, and in a somewhat later hand, so that "Sadatsugu is thought not to have been one man"[[c:2]]. His surviving signed blades are the spine of the record, and the one in the present catalogue is read, even within Ko-Aoe, as a work "of a somewhat later date"[[c:3]].
His characteristic hand is the *tachi*, *shinogi-zukuri* with *iori-mune*, deep in *sori* and finished with a *chū-kissaki*, the signature cut in two characters on the *ha-ura* near the *nakago-jiri* and toward the *mune*, the *yasurime* the steeply slanted *ō-sujikai* that marks a Bicchū tang. What distinguishes the work is not flamboyance but restraint: over the steel he sets a narrow *suguha*, the *nioiguchi* drawn tight and carrying *ko-nie*, into which only a measured *ko-gunome* and a little *ashi* enter, with *tobiyaki* appearing here and there toward the *monouchi*. It is the calm opposite of the towering clove-flower of mainstream Bizen, and the published sources name the orderly *suguha* with its suitably blended *ko-gunome*, set against the quality of the steel and a gentle bearing, "a piece that conveys the dignity of the Aoe school"[[c:4]].
The *jigane* is where the school speaks. On the signed *tachi* it is an *itame* mixed with *mokume*, inclining toward *masame* nearer the edge, with *ji-nie* adhering and *jifu* mixed through; on the shortened blade it tightens into a well-packed *ko-itame* with abundant *ji-nie* and *chikei*. Across both rises the Aoe *jigane* the published sources call "a *jifu*-toned *utsuri*"[[c:5]], the patchy reflection that stands in place of the clear *midare-utsuri* of Bizen and is the surest mark separating his steel from the otherwise comparable Bizen work. The *bōshi* runs straight to a small round, on the *ura* basically straight with *hakikake* and a somewhat long *kaeri*, and on the later blade a *bō-hi* is carved through.
What survives shows him in two registers of the one hand. The *ubu*, two-character signed *tachi*, with its small-style *mei* and *ō-sujikai* file marks, is his recognized type, quiet and orderly. Against it stands an *ō-suriage* blade whose long folded-back signature was, at some shortening, repaired and remade into an affixed inscription reading "Sadatsugu, resident of Bicchū Province"[[c:6]]; its multiple peg-holes show the blade was reduced more than once, yet the *suguha* and the fine *ko-itame* still carry the school's dignity. The variation in the manner of the signature across these works is exactly the evidence on which the published sources rest the conclusion that more than one smith used the name.
Within the Aoe line his hand sits beside the other *tsugu*-signing smiths, more subdued and astringent than the contemporary Bizen *chōji*. His own grounded tells set him apart: the *jifu*-toned *utsuri* in the steel, the narrow tight-*nioiguchi* *suguha* rather than a flamboyant *midare*, and the *ō-sujikai* file marks with the *ha-ura* two-character signature that the school cuts where Ko-Bizen would not. These, rather than any borrowed comparison, are what the published sources name as the basis of the Aoe attribution.
For the collector he is a scarce early Bicchū name. The Tōkō Taikan places him high, and his record is led not by the open market but by designated heritage: three of his blades are Important Cultural Properties, among them the signed *tachi* held by the Tokyo National Museum, a further signed *tachi* preserved in Toyama, and the *kinzogan*-attributed *katana* known as "Ō-Aoe," shortened and gold-inlaid with a Hon'ami appraisal. These are patrimony, held in museums and long-kept collections, and never come to market; one signed *tachi* of recorded whereabouts descended through the Kuroda house. Below them only a small number reach the Tokubetsu Jūyō and Jūyō tiers, so a signed Sadatsugu in private hands is among the rarer things a student of Ko-Aoe could hope to encounter, and one appears, when it does, only with patience.
Toshitsugu (俊次) — Mainline · 1211-1213. Jūbun, Jūbi, Tokujū, Jūyō. Toshitsugu is a Ko-Aoe smith of Bicchū, working in the early Kamakura period and transmitted in the reference works as a son either of Ko-Aoe Moritsugu or of Tsuguiye, with the Meikan placing his activity about the Kenryaku era. The Aoe school grew up in the iron country of the lower Takahashi river, around the villages of Aoe and Manju, and the published sources reserve the name Ko-Aoe for the work of the school that does not descend later than roughly the middle of the Kamakura period. Within that early body Toshitsugu stands as one of the names by which the manner is recognized, though the published commentary returns again and again to a single fact about him: that his signed work scarcely survives. The NBTHK states plainly that of this smith "extant signed works are exceedingly few"[[c:1]], and it is against that scarcity that each surviving blade is weighed.
His characteristic hand is the tachi, several still bearing a bold two-character signature cut on the ha-ura, one of them ubu with high koshizori and a small kissaki, the rest shortened yet keeping the old tachi carriage with marked funbari, one running to an ikubi-leaning point. Over the steel he sets a deliberately quiet temper. The base is a chū-suguha or a plain suguha into which ko-midare, ko-chōji and small gunome enter, ashi and yō coming in well, the nioiguchi deep in nioi with thick ko-nie, kinsuji and sunagashi running through it. It is not the flamboyant clove-flower of the great Bizen schools but a calm irregular line, and on one broad late tachi a kuichigai-ba breaks the temper near the koshimoto while the nioiguchi turns bright and clear. The bōshi runs straight to a small ko-maru, and on the finest signed tachi turns back from suguha into a fuller ō-maru sweep.
The jigane is where the school speaks. Toshitsugu forges a ko-itame, in places an itame mixed with mokume that flows and stands a little, with ji-nie adhering and chikei entering, and through it run the patchy jifu and the crepe-like surface the published sources name a chirimen jihada, calling the texture in so many words a "crepe-like grain"[[c:2]]. A faint utsuri stands over that jigane on his signed pieces. On his most refined attributed work the reflection becomes his particular note: a suji-utsuri gathers near the edge while a midare-utsuri rises toward the back, and the two together give the layered, stepped dan-utsuri that sets those blades apart. The published sources read the whole of this Ko-Aoe manner as quieter than the Bizen work of the same day, "somewhat more subdued, with an astringent depth of flavor when compared with contemporary Bizen"[[c:3]].
His record divides into two faces. The first is the signed tachi already described, the foundation of any judgment of his hand. The second is the o-suriage mumei katana gold-inlaid Kōfū, broad in body with little taper from base to tip, thick in kasane, deeply curved, ending in a compact chū-kissaki, the jigane standing overall with minute ji-nie and the suji- and midare-utsuri that read as dan-utsuri. Because that powerful shape and those features bind it so closely to the signed Tokubetsu Jūyō tachi of the thirteenth session, the published sources judge it the work of the same smith. The file marks on the tang are a large ō-sujikai, named a point of appreciation for the school, and the commentary notes that many Ko-Aoe smiths, Toshitsugu among them, cut the signature on the ha-ura rather than the customary omote, calling the "large sujikai file marks a point of appreciation for this group"[[c:4]].
What separates Toshitsugu within his own province is exactly this calm. Where the wider Aoe stream and the Bizen schools beyond it carry a showier chōji-midare, his hand keeps to the suguha-based ko-midare over the chirimen jigane, the astringent register the judges treat as the old Bicchu taste. The thirteenth-session tachi is held up not merely as a good Toshitsugu but as a high point of the school as a whole, the NBTHK naming it "an outstanding piece not only among this smith's works but within the Aoe group itself"[[c:5]]; of an earlier Jūyō tachi the same body of commentary says that a piece of such quality "has no equal elsewhere"[[c:6]] among his surviving signed work. His standing rests less on volume than on the height of the few that remain.
For the collector Toshitsugu is a rare early name carried at a high rank. Fujishiro grades him Jō-jō saku. He has no National Treasures; his record runs instead through an Important Cultural Property, a tachi held at Dazaifu Tenmangū in Fukuoka, a prewar Jūyō Bijutsuhin now in the Sano Art Museum in Shizuoka, two Tokubetsu Jūyō and a small number of Jūyō, six designated works in all on the official record. The signed pieces are the precious ones, the published sources prizing the ubu tachi for keeping its original tang and signature; the o-suriage mumei katana, secured to him by its bond to the signed Tokubetsu Jūyō, is the other way his hand reaches a collection. With only a handful of blades across the Tokubetsu Jūyō and Jūyō tiers, and most of them held rather than traded, a signed Ko-Aoe Toshitsugu comes to light only seldom; a privately held example is a notable thing for a collector to encounter, and a document of how quietly, and how well, the old Bicchu smiths worked beside the brighter forges of Bizen.
Moritsugu (守次) — Mainline · 1264-1275. Jūbun, Jūbi, Jūyō. Ko-Aoe Moritsugu (守次) is traditionally recorded as the son of Yasutsugu, who is regarded as the founder of the Aoe school of Bitchu Province. The name Moritsugu was transmitted across multiple generations, from the early Kamakura period through the Nanbokucho era, and sword reference works acknowledge several craftsmen bearing the same name even within the Ko-Aoe lineage. Among extant signed works appraised as Ko-Aoe, the forms of the *mei* comprise distinct types: examples cut with a powerful stroke in thick chiseling and in an almost block-script style; examples in a semi-cursive style (*gyosho*) with strong chisel impressions incorporating *gyaku-tagane*; and examples in a flowing cursive script (*sosho*) cut with a smooth, glossy manner. The former type appears to go back slightly further in time.
The characteristic workmanship of Moritsugu centers on a well-forged *itame-hada* mixed with abundant *mokume*, in which the grain tends to stand. Exceedingly fine *ji-nie* adheres thickly, bold *chikei* appear profusely, and a *midare-utsuri*-like cast rises across the surface, sometimes developing into *chirimen-hada*. The presence of *jifu* is noted in several examples. The temper line is fundamentally *suguha*, at times carrying a shallow *notare* tendency, mixed with *ko-gunome* and *ko-choji*; the *nioiguchi* is tight in feeling with *ko-nie* attached, and fine *kinsuji* and *sunagashi* enter. One setsumei observes that the *nioiguchi* is notably bright. The *bosshi* typically runs straight, forming *ko-maru* or tending toward *yakitsume*. Importantly, while Ko-Aoe smiths as a rule signed on the *tachi-ura*, Moritsugu is an exception, signing on the *tachi-omote*.
The NBTHK consistently praises the deep, tide-like appearance (*shio-ai*) found in Moritsugu's work as especially admirable, a dense visual effect prized in Aoe production. Works preserving an *ubu* tachi form with classical *koshizori* and *funbari* are noted for possessing a high sense of dignity. Extant works from the earlier generations are acknowledged as rare, lending them exceptional documentary value as source material for the study of the Aoe school. The quiet refinement of the *suguha* temper, combined with a bright *nioiguchi* and richly varied internal activity, clearly demonstrates the high technical level maintained across this lineage.
Tsugutada (次忠) — Mainline · 1232-1233. Jūbun, Tokujū, Jūyō. Tsugutada is a Ko-Aoe smith of Bicchu, placed by the published sources at the close of the Heian period into the early Kamakura, traditionally about the Joei years, and named variously a son of Tsugie or of Yasutsugu. His blades are all tachi, and several survive ubu, the original tang carrying a boldly cut, thick-chiseled two-character signature on the haki-ura. Of one such piece a Tokubetsu Juyo entry says plainly that it is "a large-scale work by Ko-Aoe Tsugutada"[[c:1]]. He belongs to the oldest stratum of the Aoe school, the Bicchu smiths who forged at Ko-i and Manju in the lower basin of the Takahashi River and whose work down to about the middle of the Kamakura is set apart as Ko-Aoe, a manner the sources describe as resembling contemporary Bizen yet quieter and more astringent in flavor in the jigane.
The tell of his hand is its restraint. Where the Bizen smiths of his age tempered brightly, his is a quiet, suguha-toned line, the yakiba on his finer tachi narrow, into which small ko-midare, ko-gunome and at times ko-choji enter with some height variation and ashi running in. Over it the nie adheres well, sunagashi and kinsuji appear frequently, and hotsure, uchinoke and yubashiri gather along the habuchi. The nioiguchi inclines to the subdued shizumi the published sources name the Ko-Aoe character, the astringency that, set beside the livelier Bizen nioiguchi, gives his work its antique fragrance. The boshi runs essentially straight to a small round, or scatters its nie and sweeps a little in hakikake at the tip.
The jigane is the constant of his record. The forging is an itame mixed with mokume that stands a little, running to the crisp, crepe-like chirimen-hada that the sources hold a hallmark of the Aoe jigane, the grain standing rather than packing flat as in Bizen. Across the ji lie the speckled jifu and, on his finest blades, patches of the clear-band sumihada, with ji-nie well set, chikei entering, and a faint utsuri rising. On the Naruse-family tachi the steel is at its most expressive: itame with mokume in a chirimen texture, sumihada mixed in, thick ji-nie, and a temper dropped above the machi in yakiotoshi, above which a fine suguha is the base, the lower half worked with hotsure, uchinoke and yubashiri, becoming ko-midare around the middle, the nioiguchi somewhat deep and falling, again, toward shizumi.
His record divides, as the judges themselves draw it, into two faces of one hand. The first is the dignified ubu signed tachi, high in koshizori with strong funbari and a compact point, the imposing period shape stated plainly, the temper comparatively calm over the speckled Aoe ji. The second is the austere, refined late manner, of which the published sources say his work has "a plain and somewhat rustic feeling"[[c:2]] and that "a deep and astringent, quietly resonant workmanship seems to be his hallmark"[[c:3]]. The tang on every blade is filed in the o-sujikai of the Bitchu convention, the signature set on the haki-ura, and on one piece the sources note that its placement above the mekugi-ana is unusual.
What sets Tsugutada apart from his Bizen neighbours is exactly that quietness. His faint utsuri and chirimen jigane, his small clove and gunome carried on a suguha base, and his sinking nioiguchi give him the astringent, antique character the published sources read across his oeuvre, against the brighter clove-flower of Bizen. Within Ko-Aoe he stands among its representative early hands, a smith whose work is plain and rustic, the quiet root from which the school's later Nanbokucho generations would grow. Several of his blades carry battle cuts and an arrow wound in the upper monouchi which, as one entry observes, speak of martial exploits in ages past.
For the collector he is a rare early name. Fujishiro grades him Jo saku, and the Toko Taikan values his work among the higher Ko-Aoe figures. The defining fact is scarcity: the published sources state that "extant signed tachi by Tsugutada number only two or three"[[c:4]], and call him a comparatively lesser-known figure within Ko-Aoe, so that each ubu, signed blade is a documentary source of exceptionally high value for the study of the smith. He has no National Treasures; his record runs through one Important Cultural Property, a single Tokubetsu Juyo and a few Juyo, with his blades preserved in long-held collections and institutions grounded in their own provenance, the Naruse family among the daimyo houses, and pieces held at the Tokyo National Museum and the Mori Shusui Museum of Art. The published commentary calls the Naruse tachi "a superior example in which Tsugutada's austere and deeply flavored style is well expressed"[[c:5]]. With so few signed examples on record and most of them held rather than traded, a signed Ko-Aoe Tsugutada comes to light only seldom, and a privately held example is a notable thing for a collector to encounter, a document of how the oldest Bicchu smiths worked their quiet, astringent steel.
Nobutsugu (延次) — Mainline · 1206-1207. Jūbi, Tokujū. Enji of Bicchu Province, Ko-Aoe[[c:1]], is the name the Tokubetsu Juyo tachi gives for this smith, and the published sources set him at the head of the line: he is held to be the first-generation Enji, traditionally the son of Ko-Aoe Moritsugu[[c:2]], with the name then carried down into the late Kamakura. He belongs to the Aoe group of Bicchu, the swordsmiths who appeared roughly two centuries after the early-eleventh-century reader Shin Sarugaku-ki listed "Bicchu swords" among the products of the provinces, and who worked the lower Takahashi River basin around Aoe and Manju. Within that group the works that do not descend later than the mid-Kamakura are called Ko-Aoe, the early Aoe, and it is to this earliest stratum that his blades are read. A question of generation comes with the name: the reference compilations record several smiths signing 延次 from the start of the Kamakura period onward, so the corpus carries a name borne by more than one hand, sorted out by date rather than by a difference of school.
His authenticated work is the signed tachi, slender and built with a high koshizori and funbari, the kissaki kept small, the tang on the least altered pieces remaining ubu in the kijimomo pheasant-thigh shape. The hand that recognises him reads first in the steel. Over a tightly forged ko-itame with fine ji-nie and chikei, the grain stands up across the whole blade and takes on the crepe-silk chirimen-hada of the school, the published sources writing that overall the grain rises into that crepe-like jigane[[c:3]]. Clear sumi-hada patches surface in the ji, ji-madara intermingles, and a midare-utsuri stands over it, the faint sumi-hada and reflection together the marks that hold his jigane to Aoe and away from a plain Bizen tachi. Over this he tempers a suguha base, shallowly notare, into which small gunome and small choji are mixed and ko-ashi enter well; the nioiguchi tends tight and shows bright and clear, and the boshi turns back in ko-maru. The published sources single out that brightly clear nioiguchi as the superb point of the work, judging on the Tokubetsu Juyo piece that the way it grows bright and clear is splendid[[c:4]].
The register is the quiet one of the early Aoe, and that is the point of him. His is a suguha-toned manner, not the saka-gunome flamboyance toward which the later Aoe smiths of the Nanbokucho would move, and the small clove and small gunome ride on the straight base as activity rather than govern it. The interest lies in the pairing of a calm temper with a busy ji: the standing grain, the crepe of the chirimen-hada, the patches of sumi-hada, the midare-utsuri laid faintly over all of it. The published sources read this whole as the school speaking through one of its founders, holding of the Tokubetsu Juyo tachi that in both jigane and hamon it well displays the distinctive features of the group and that its workmanship is excellent[[c:5]], and of the Juyo tachi that it clearly displays the features of the Ko-Aoe school in both ji and ha[[c:6]]. What separates his blades from a Bizen suguha tachi is therefore not the temper, which they share, but the jigane beneath it.
The corpus divides cleanly by date, and the division is one the published record itself draws. One of the two prewar Important Art Object tachi keeps an almost original kijimomo tang with a high koshizori and marked funbari, a faint sumi-hada appearing with ji-madara intermixed and a midare-utsuri standing out[[c:7]]; from its sugata and the work in ji and ha the published sources carry it back to the early Kamakura. The second is assigned instead to the mid-Kamakura, around the Bun'ei era of 1264 to 1274, its commentary opening by noting that several smiths signed Enji from the start of the Kamakura onward[[c:8]] and placing this piece with the later of them. It keeps the slender form and small kissaki, a tightly packed ko-itame with fine ji-nie and a tendency toward utsuri, the temper beginning in a gunome manner and resolving into a slightly ko-nie-laden suguha with ko-ashi. The signature itself is part of the recognition: a bare two-character mei is cut on the ha-ura near the tang tip, with a fine chisel yet in somewhat large characters, over a steeply slanted o-sujikai file pattern. The published sources note that within the Ko-Aoe tradition, not limited to Enji, it is standard to cut the signature on the ha-ura[[c:9]], and that the o-sujikai yasurime is a point not to be overlooked; on the Tokubetsu Juyo piece they add that the calligraphy of the mei precisely matches the example certified as an Important Art Object[[c:10]].
His standing is best taken from the school he opens rather than from a rivalry. Enji stands at the top of the Ko-Aoe genealogy as the son of Moritsugu, the name descending through the line to the late Kamakura. The published sources note that signed Enji tachi survive in relatively greater numbers than for most of his fellows, so the difficulty for the connoisseur is less one of authentication than of generation, of placing a given signed blade early or late within the run of the name. What recurs across his record as his own is consistent: the crepe jigane with its sumi-hada and faint reflection, the bright tight nioiguchi over a quiet suguha, the two-character ha-ura signature above steep file marks. These are not borrowed from a greater contemporary but are the early Aoe seen at its source, and unsigned attributions to the school rest on exactly this combination.
The Toko Taikan values his work in the middle range, and three of his blades stand on the official record as designated works. There are no National Treasures or Important Cultural Properties among them. The earliest are the two prewar Important Art Object tachi, one recorded in the Kozan Oshigata and the Imamura Oshigata, held by Konoe Fumimaro and now in the Yomei Bunko in Kyoto; the other owned at its designation by Seto Yasutaro of Hyogo. Above these stands a single tachi raised to Tokubetsu Juyo, with its Juyo record on the same blade. Enji is accordingly a smith of the early Aoe more approachable than the great Kamakura names yet still uncommon: his signed tachi appear from time to time and with patience, and most carry only the bare two characters of his name, so that placing the generation falls to the eye reading the crepe jigane and the bright suguha. A piece with secure provenance of the kind the Yomei Bunko tachi preserves, transmitted with its history and certified for its calligraphy, is the rarest among them and a landmark when one is encountered.
Yoshitsugu (吉次) — Mainline · 1288-1293. Jūbun, Jūyō. Yoshitsugu is counted among the representative smiths of the Bitchu Aoe school during the late Kamakura period. He bore the title Uemon no Jo and was a resident of Manju in Bitchu Province, belonging to the Naka-Aoe lineage. His long signatures — such as "Bishu Manjusho ju Uemon no Jo Yoshitsugu saku"[[c:1]] and "Bitchu no Kuni Aoe ju Uemon no Jo Taira Yoshitsugu saku"[[c:2]] — are the form most commonly encountered among his surviving works, with dated examples from the Gentoku and Kareki eras establishing his active period. Earlier works bearing shorter two-character signatures are also known and are thought to predate the long, dated inscriptions.
Yoshitsugu's workmanship conforms to the general manner shared by Aoe works of this period, with the characteristic features of the school well expressed. His tachi display deep curvature with a *chu-kissaki* that is somewhat compact. The *kitae* is *itame-hada* tending toward *hada-dachi*, with *ji-nie* adhering and areas of clear, refined steel mixed in. The *hamon* is typically *suguha*-based — whether *naka-suguha* toned with mixed *gunome*, or showing slight *notare* — with the *nioiguchi* tight and *saeru*, *ko-nie* attaching, and *ashi* entering frequently. The *boshi* is straight, forming *ko-maru* at the tip. The *yasurime* characteristically follow the *o-sujikai* pattern associated with the Aoe school.
Yoshitsugu occupies a position of importance as a representative figure of the Naka-Aoe lineage at its height. His works demonstrate the typical late-Kamakura style of the Aoe school, with forging and tempering of excellent quality[[c:3]]. Examples retaining *ubu* nakago are especially valued for the light they shed on the evolution of his signature practice, from early two-character *mei* to the long, dated inscriptions of his mature period. His finest blades are praised as being *kenzen* in both *ji* and *ha*.
Hirotsugu (弘次) — Mainline · 1184-1185. Jūbun, Tokujū, Jūyō. Hirotsugu is a Ko-Aoe smith of Bitchū province whose surviving signed work falls across the early to middle Kamakura period, the span under which the Aoe school's earliest and most archaic blades are gathered. The Aoe group worked at Ko'i and Manju in the lower Takahashi river basin, and is traditionally founded by Yasutsugu around the Jōan era of the early 1170s. The published sources place Hirotsugu within the *meikan* as a son of Kunitsugu, his period given as Kōan, the name continuing through several recorded generations from the Genryaku era down to a late appearance in the Bunwa era of the Nanbokuchō period. Against that documentary placement the workmanship of his surviving tachi reads older: the judges on the 24th-session Jūyō blade note that although the *meikan* gives a Kōan date, its two-character signature and archaic manner give it points in common with the early-Kamakura Aoe group[[c:1]]. His extant signed work is comparatively scarce, the commentary on the earliest of his Jūyō tachi noting only that he was an Aoe smith whose pieces are few[[c:2]], so his hand is read from a small but consistent body of slender tachi.
The forging is where his blades are first known, and it is the Aoe *jigane* in its clearest form. Over an *itame-hada* thick with *mokume* the grain stands and gathers into the crepe-like texture the school is named for, what the published sources call the so-called *chirimen* skin[[c:3]]. Through that crepe *ji* fine *ji-nie* attaches thickly and *chikei* enter, and into it is mixed *jifu*, the patchy mottling of old Bizen-related steel, out of which a faint *jifu-utsuri* rises rather than the bright *midare-utsuri* of contemporary Bizen work. This is the discriminating mark of his *jigane*: not a clear reflection read across the *ji*, but a speckled, quiet shadow gathered out of the mottling, the Aoe variant of the Bizen feature. It is a *jigane* of subdued depth, and the published sources, characterizing the school, say that compared with contemporaneous Bizen work it is somewhat plainer and carries a quietly astringent savor[[c:4]].
The temper sits over a *chū-suguha* base broken low into small *midare*, with a tendency toward small *gunome* and, on the more restrained blades, small *chōji*. *Ashi* and *yō* enter frequently, the work carried in *nie*, the *habuchi* showing *hotsure* with fine *sunagashi*; the *nioiguchi* runs deep and in places takes on an *urumi* softness. On the 60th-session Jūyō tachi, the richest of his extant *ha*, the activity opens further: *ashi* and *saka-ashi* together, the reverse-slanting feet that are the Aoe hallmark, with *ko-nie*, small *yubashiri* and *tobiyaki*-like spots, *hotsure*, *sunagashi* and *kinsuji* all entering. That *saka-ashi*, the feet slanting back toward the base, is the clearest point by which his *hamon* parts from the straight *ashi* of Bizen. The *bōshi* runs straight and turns back small, *ko-maru* on most blades and pointed on others, often touched by *hakikake*, and once ending in *yakitsume*. The signature is cut in two characters at the tip of the *nakago*, and four of the five surviving tachi are *suriage* with one preserved *ubu*.
Within that single coherent manner the published record draws one telling distinction, concerning the brightness of the *nioiguchi*. Many Ko-Aoe works tend to a *shizumi*, a sinking and subdued *nioiguchi*, part of what the sources mean in calling the school plainer than Bizen. Against this the Tokubetsu Jūyō tachi is singled out: whereas the usual Ko-Aoe blade sinks, this one is instead rather bright, a point the judges expressly draw attention to[[c:5]]. The same blade is read as expressing the features of the school with particular clarity, a crepe *ji* with *jifu* and a *jifu-utsuri*-like reflection, an archaic and well-*nie*'d *suguha* foundation mixed with small *midare* and a tendency to small *gunome*, the fine variation along the *habuchi* conveying an old flavor. The *ubu* 37th-session tachi shows the other side of his range, carrying *horimono*, a *suken* at the *koshimoto* and *bō-hi* with *soe-hi* run as *kaki-nagashi*, its two-character signature cut large with a thick chisel, the kind of confident original blade that anchors the reading of the *suriage* pieces.
Hirotsugu's place is among the early Ko-Aoe makers whose work the NBTHK gathers close to old Bizen, and his distinction is carried by his own attested traits rather than by the comparison: the crepe *itame* with its *jifu*, the faint *jifu-utsuri*, the *saka-ashi*-bearing *suguha* worked in *nie*. The published commentary on the 14th-session tachi reads the slender, shallow-*sori*, small-pointed build together with the small *itame* turning to *chirimen-hada* and the *suguha* base mixed with *ko-chōji midare* as clearly showing the characteristic features of the Aoe school of the Kamakura period[[c:6]], and finds it an excellent tachi in both *ji* and *ha*. His archaic, *nie*-worked *suguha* sets him apart from the later Aoe smiths, whose *saka-chōji* and *dan-utsuri* grew more pronounced into the Nanbokuchō period; he belongs to the quieter, earlier register of the school, the manner the sources repeatedly read as old-fragrant and classically elegant. The 60th-session tachi is judged a Ko-Aoe work rich in subdued savor whose activities in both *ji* and *ha* are full of nuance[[c:7]], valued besides as study material for an extant example by his hand.
The weight of designation behind his name is modest in number but high in tier. Of the works on official record, five are designated, reaching the Tokubetsu Jūyō and Jūyō ranks and one Important Cultural Property; there are no National Treasures. The Important Cultural Property tachi is held at the Akihasan Hongū Akiha Shrine, patrimony in shrine keeping rather than anything that moves, and one further blade is recorded as a Prefectural Cultural Property in private hands. None of his blades carries a recorded *denrai* lineage of owners, so the connoisseurship rests on the tier record and on the quality the judges read into individual pieces, foremost the Tokubetsu Jūyō tachi, whose original robust construction is described as well retained, a thick *kasane* and full *hiraniku* surviving the shortening into a *hamaguri-ba*, plainly a careful commission for a warrior house[[c:8]]. With his signed tachi few and the foremost held as cultural property, a Hirotsugu in open hands is among the rarer encounters in old Aoe work, the Tokubetsu Jūyō and Jūyō pieces reaching the market only seldom and a signed example a landmark when one does.
Aritsugu (有次) — Mainline · 1233-1234. Jūbun. Smith of the Bitchū Aoe School.
Koresuke (是介) — Mainline · 1190-1199. Jūbun, Jūyō. Smith of the Bitchū Aoe School.
Toshitada (俊忠) — Mainline · 1233-1234. Jūbun. Smith of the Bitchū Aoe School.
Tsuguie (次家) — Mainline · 1207-1211. Jūbun, Jūyō. Smith of the Bitchū Aoe School.
Suketsuna (助綱) — Mainline · 1247-1249. Tokujū, Jūyō. Suketsuna is a smith of the Ko-Aoe lineage, active in Bitchu Province from the late Heian through approximately the mid-Kamakura period. The swordsmiths of Bitchu are broadly divided into two groups: those of the Seno Kajishi line tracing their origin to Noritaka, and those of the Aoe Kajishi line whose signatures characteristically incorporate the character *tsugi*. Today, however, these are generally grouped together under the broad designation "Aoe smiths." While the name Suketsuna also appears among the Kamakura Ichimonji, Fukuoka Ichimonji, Osafune, and Kokubunji lineages, the works attributed to this maker belong specifically to the Ko-Aoe tradition, which flourished centered on Aoe along the basin of the Takahashi River. Extant signed works by this smith are comparatively rare, making each surviving example precious as documentary material.
In terms of workmanship, Suketsuna's blades display the hallmark characteristics of the Ko-Aoe school. The *jigane* tends toward *hada-dachi*, forming a *chirimen-hada* (crepe-like) texture[[c:2]], with *jifu* frequently appearing alongside well-adhering *ji-nie*. The *hamon* is consistently *suguha*-based[[c:3]], rendered in *ko-nie-deki*, often mixed with *ko-midare*, *gunome*, or *ko-choji*; *ashi* and *yo* enter within the temper, and *sunagashi* is sometimes applied. The *boshi* characteristically runs straight or in shallow *notare*, turning back in *ko-maru* with slight *kaeri*. *Bo-hi* are commonly carved through on both sides. The *nakago*, typically *suriage*, bears the distinctive Ko-Aoe practice of cutting the signature on the *ha-ura* side[[c:4]] with thick chisel strokes. Overall, when compared with contemporary Bizen works, the impression is more subdued and austere, with the *nioiguchi* tending toward *shizumi*.
Suketsuna's surviving tachi consistently exhibit a slender build with pronounced *koshizori* and *ko-kissaki*[[c:1]], preserving an archaic period character that does not descend later than the mid-Kamakura period. The combination of *jifu-utsuri* standing out clearly in the *ji*, the restrained *suguha*-toned temper with *ko-nie*, and the signature placement on the *ha-ura* side together constitute unmistakable hallmarks of the school. As works by this smith are few, each blade serves not only as an exemplar of Ko-Aoe craftsmanship but also as invaluable source material for the study of early Bitchu swordmaking traditions.
Moritsugu (守次) — Mainline · 1247-1249. Tokujū. Moritsugu (守次) was a smith of the Ko-Aoe school of Bitchū Province, traditionally regarded as the son of Yasutsugu, who is held to be the founder of the Aoe lineage. The name "Moritsugu" was inherited by successive smiths down into the Nanbokucho period, with extant works spanning from the early Kamakura period through the Bunwa and Enbun eras of the mid-Nanbokucho. Among signed works appraised as Ko-Aoe, scholarship distinguishes two signature types: a two-character *gyōsho* (semi-cursive) form, powerfully struck and incorporating *gyaku-tagane* (reverse chisel work), and a characteristically elongated, flowing *sōsho* (cursive) form. The former type appears to date slightly earlier. While Ko-Aoe works are typically signed on the *ha-ura*, Moritsugu is a noted exception, customarily signing on the *ha-omote*.
Moritsugu's forging characteristically shows *itame-hada* with vigorous *mokume* admixture that tends toward finely raised grain, frequently producing the distinctive *chirimen-hada* (crêpe-like texture) associated with the Ko-Aoe tradition. Dense *ji-nie* adheres thickly, with conspicuous *chikei* throughout, and a *midare-utsuri*-like reflection or faint mottled *utsuri* appears. His *hamon* is grounded in *suguha*, mixed with *ko-gunome* and *ko-chōji*; small *ashi* enter actively, and the *nioiguchi* shows a *shimarigokoro* (tightened tendency) with *ko-nie* adhering. Along the *habuchi*, features such as *hotsure*, *nijūba*, *yubashiri*, and *uchi-noke* appear, with *kinsuji* and *sunagashi* running through, yielding a bright *nioiguchi*.
The NBTHK characterizes Moritsugu's workmanship as displaying an archaic (*kochō*) manner that conveys a high level of dignity, combining grandeur with elegance. His blades are praised for richly varied workmanship and a "notably superior appearance." As rare extant examples from the Ko-Aoe group, works by Moritsugu are assessed as possessing extremely high documentary value for the study of the Aoe school, and those found *kenzen* in both *ji* and *ha* are termed "precious works."
Sukeyori (助依) — Mainline · 1288-1293. Tokujū. Sukeyori was a swordsmith of the Ko-Aoe school of Bitchu Province, active during the early Kamakura period. The Aoe lineage is traditionally traced to Yasutsugu of the Joan era (1171--1175) and thereafter produced many noted craftsmen through the late Nanbokucho period; works dating no later than approximately the mid-Kamakura period are especially distinguished as Ko-Aoe. Representative smiths of this early group include Moritsugu, Tametsugu, Tsugie, Tsugutada, Sadatsugu, Yasutsugu, Kanetsugu, Tsunetsugu, Toshitsugu, and Suketsugu, among others. In the *meikan*, Sukeyori is recorded with a Shoo-era dating[[c:1]] that is regarded as probably not greatly in error. All blades bearing the Sukeyori signature that have been confirmed in *shinsa* to date have been limited to *tachi*, and all share the consistent two-character *mei* and common features in both workmanship and manner of cutting the inscription.
Sukeyori's forging characteristically displays *itame* mixed with *mokume*, tending toward standing grain and producing the so-called *chirimen-hada* --- the crepe-like texture regarded as diagnostic of the Ko-Aoe group. The *jihada* is rich in *chikei* and *jifu*, with fine, thick *ji-nie* adhering throughout. A faint *utsuri* may stand up within the surface. The *hamon* is based on *suguha* with slight shallow *notare* or *ko-midare*, sometimes mixed with *ko-choji*; the *nioiguchi* shows a somewhat *shizumi* tendency, and thick *ko-nie* adheres, with *ashi*, *yo*, and occasional *nie*-streak-like activity producing a deep and resonant character. The *boshi* typically enters *ko-maru*, at times with *hakikake*. The *nakago* bears the distinctive *o-sujikai* filemarks and signature placement on the *ha-ura*, centered below the *mekugi-ana* --- conventions characteristic of the Aoe school as a whole and clearly distinguishing these works from contemporary Bizen production.
Compared with the forging usually encountered in this school, Sukeyori's finest works show a *ko-itame* that is uniformly tight, presenting a well-refined and notably elegant texture. The NBTHK has observed that both *ji* and *ha* clearly express the workmanship typical of this group, while conveying the subdued, austere flavor that sets Ko-Aoe apart from Ko-Bizen and related traditions. Extant works by Sukeyori are few, and *tachi* retaining an *ubu-nakago* are especially scarce, rendering authenticated examples exceedingly valuable as documentary material. His superior pieces are praised for a dignified form well complemented by an archaic *hamon*.
Kagetsugu (景次) — Mainline · 1190-1199. Tokujū. Smith of the Bitchū Aoe School.
Koretomo (是友) — Mainline · 1207-1211. Tokujū, Jūyō. Smith of the Bitchū Aoe School.
Moritsugu (守次) — Mainline · 1151-1154. Tokujū. Smith of the Bitchū Aoe School.
Sanetsugu (真次) — Mainline · Early Kamakura. Tokujū. Smith of the Bitchū Aoe School.
Takatsuna (高綱) — Mainline · 1204-1206. Tokujū. Takatsuna is a smith of the Ko-Aoe school in Bitchu Province, active from the late Heian period into the early Kamakura period. Although swordsmith reference works (*meikan*) list three smiths of Ko-Bizen named Takatsuna -- assigned respectively to around the Genkyū, Kangen, and Kōchō eras -- and further indicate the existence of several additional makers of the same name, the NBTHK has distinguished this Takatsuna as a separate figure within the Ko-Aoe lineage on the basis of forging characteristics, file marks, and the archaic character of the signature. Works attributed to him also appear in the Imperial Collection under the broader Yamashiro tradition, reflecting the overlapping classificatory frameworks applied to smiths of this early period.
Takatsuna's work is defined by an *itame-hada* forging mixed with *ko-mokume* that shows "a tendency toward *hada-dachi*" (standing grain), accompanied by thick *ji-nie*, fine *chikei*, and a prominent mottled *jifu-utsuri*. His *hamon* is fundamentally *suguha*-based, mixed with *ko-midare*, *ko-chōji*, and *ko-gunome*; *ashi* and *yō* enter frequently, with thick *nie* that in places becomes especially strong, producing *hotsure*, *yubashiri*, and a *nijūba*-like appearance. *Kinsuji* and *sunagashi* are described as "applied vigorously." In both *ji* and *ha*, "the characteristic features of Ko-Aoe are strongly expressed." The presence of old *ō-sujikai* file marks and the archaic manner of the signature characters further support the attribution.
The NBTHK describes Takatsuna's surviving work as revealing "the high technical level" and "high technical ability" of the smith, presenting "an excellent workmanship" and "an excellent *dekiba*." His blades are praised for their *kenzen* (sound and well-preserved) construction and for a "refined, well-worked forging with finely interwoven chikei." Beyond their artistic merit, they are regarded as "extremely valuable as documentary material" -- pieces that "help compensate for gaps in the meikan record," filling lacunae in the historical understanding of the Ko-Aoe school.
Other smiths
Tsuneyoshi (恒吉) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Chikatsugu (親次) — Mainline · 1278-1288. Chikatsugu was a swordsmith of the Aoe group (*Aoe-ha*) in Bitchu Province. Sword reference compendia (*meikan*) record smiths bearing the name Chikatsugu in both Bizen — at Osafune and in Nitta Manor (*Nitta-sho*) — as well as in Bitchu Aoe, and the name is further associated with a founder of the Hokke Ichijo lineage in Bingo Province. The Chikatsugu most prominently represented among designated works is recorded as the son of Sa-hyoe no Jo Chikatsugu, affiliated with the Kichiji group (*Kichiji-mon*), with dated works under the era names Genko and Ryakuo placing his activity in the late Kamakura to early Nanbokucho period, around Kagen (1303-1306). An earlier generation, attributed to the mid-Kamakura period around Koan (1278-1288), is associated with Ko-Aoe work and identified as the son of Aoe Suketsugu.
The forging of Chikatsugu's blades displays the Aoe school's distinctive traits in pronounced clarity. The *jigane* characteristically develops a *chirimen-hada* — the fine, crepe-like standing grain that is a hallmark of the group — while *ji-nie* adheres and *jifu* appears throughout. *Midare-utsuri* is observed on works of broader proportions. The *hamon* is fundamentally *suguha-cho*, a straight temper base into which small-pattern elements such as *ko-gunome*, *ko-choji*, and *ko-midare* are mixed, with *ko-ashi*, *yo*, *saka-ashi*, and *nezumi-ashi* entering the temper. The *nioiguchi* tends toward tightness with *ko-nie*, and on larger works the *ko-nie* deepens above the *monouchi*. Blades of the later generation present a commanding, dignified shape (*te-gara*) with wide *mihaba*, *funbari*, and *chu-kissaki*, while shortened earlier-generation works retain orthodox proportions and well-balanced form.
Chikatsugu's oeuvre illustrates the breadth of the Aoe tradition across the mid- to late Kamakura period and into the Nanbokucho era. The NBTHK examiners note that even where a blade shows a slight *tsukare-gokoro* — a somewhat fatigued tendency — the essential *tachi* shape of the Kamakura period has not collapsed, affirming these as good works. Works of the later generation are distinguished by their martial character; *kirikomi* on the *mune* stand as evidence of a blade's battlefield exploits. The transmission of individual pieces through eminent households, including the Kan'in-no-miya and the Sano Art Museum, attests to the enduring regard in which Aoe Chikatsugu's work has been held within the canon of Bitchu swordsmithing.
Hisatsugu (久次) — Mainline · 1243-1247. Smith of the Bitchū Aoe School.
Shigetsugu (重次) — Mainline · 1264-1275. A signed tachi designated at the 48th Jūyō session carries a two-character mei, Shigetsugu, cut boldly on the ura of a shortened tang filed in ō-sujikai, and the published commentary reads it as classic Ko-Aoe: "this tachi clearly displays the characteristics of Ko-Aoe.[[c:1]]" Shigetsugu is a smith of the Ko-Aoe, the early phase of the Aoe school of Bicchū Province. The published sources identify him with the craftsman recorded in the reference works as a son of Toshitsugu and placed in the mid-Kamakura period around Bun'ei (1264-1275); they note plainly that "this Shigetsugu corresponds to the smith transmitted in the meikan as the son of Toshitsugu, mid-Kamakura, around Bun'ei.[[c:2]]" The school itself is traced to Yasutsugu of the Jōan years, and works that do not descend past the mid-Kamakura are set apart as Ko-Aoe; among its representative hands the published record names Moritsugu, Tametsugu, Tsugie, Tsunetsugu, Toshitsugu, Suketsugu and this Shigetsugu, most of them carrying the character tsugu as a shared element of their names.
His surviving work is tachi, slender and well-shaped, with a deep koshi-zori and pronounced funbari, several still keeping their original tang. The hand that distinguishes him is a quiet one. Over an *itame* mixed with *mokume*, at times a closely packed *ko-itame* standing a little, he forges a steel somewhat dark in tone that tends toward *sumihada*, carrying the speckled *jihada-madara* and patchy *jifu* that are the Aoe *jigane*, with fine *ji-nie* and, on his most fully described blade, a clear *midare-utsuri* standing in the *ji*. The temper over that *jigane* is calm and archaic, a *suguha* base shallowly *notare* into which a small *ko-midare* of *ko-gunome* and *ko-chōji* enters. *Ashi* and *yō* are well present, the *nie* thick and in places particularly strong, and *kinsuji* and *sunagashi* run frequently along the edge. The *bōshi* runs straight to a *yakizume*-like finish with fine *hakikake*. The published sources call the effect old in feeling and rich in *nie*, the activity gathered not in towering clove clusters but in the small reversed-clove line and its internal work.
The *jigane* is where his school shows most plainly. The somewhat dark steel, the *sumihada* and *jifu*, and the crepe-like *chirimen* texture set the Aoe *jigane* against the brighter, cleaner *ko-itame* of contemporary Bizen, and the published commentary draws the contrast directly, judging Ko-Aoe work "on the whole somewhat subdued and quietly astringent in flavour compared with Bizen blades of the same period.[[c:3]]" Over that *jigane* the *hamon* stays comparatively restrained. The published sources praise the most fully described of his blades for being "archaic in the temper, well covered in *nie*,[[c:4]]" with *ashi*, *yō*, *kinsuji* and *sunagashi* showing within, a deeply nuanced and engaging manner rather than a flamboyant one.
Not all of his record is so quiet. One of his shortened, two-character-signed tachi opens instead into a dense, double-flower *jūka-chōji-midare* in *nioi-deki* with a tendency toward *ko-nie*, the *ji* an *itame* standing a little with *sumihada* and an *utsuri*-like reflection. The published sources note that, set beside his quieter *suguha*-toned work, the manner of the signature and the workmanship differ across his extant pieces, so the activity can open here into a richer clove-flower line. That blade carries a cut-in inscription recording its shortening in Tenbun 10 (1541) by Fukui Ukyō-no-suke Koremune Tadanō, a documented later history laid over an early hand.
What the judges single out separates him within his own school as much as from his neighbours. Compared with the brighter, cleaner steel of Ko-Bizen, his somewhat dark *jihada* with its *sumihada* and *jifu* reads as the Aoe *jigane*; and against the school's own conventions the published record notes a telling exception. The three prewar Important Art Object tachi are signed on the *omote*, which the commentary remarks is "although Ko-Aoe works, exceptionally bearing tachi-style signatures,[[c:5]]" whereas the Jūyō tachi places its signature on the *ura* in the usual Ko-Aoe manner, the tang filed in *ō-sujikai*; the placement of the signature and the file marks are exactly the points the published sources name as distinguishing the school from Ko-Bizen, and they cite them in support of the attribution. He stands among the named early hands of Aoe, the quiet Bicchū counterweight to the brilliance of Kamakura Bizen.
For the collector he is a rare early name, graded Jō saku by Fujishiro. He has no National Treasures and no Important Cultural Properties; his record runs instead through three blades designated Important Art Objects before the war and one tachi designated Jūyō, four designated works in all, and the published commentary calls the surviving examples precious, holding that "extant works by Shigetsugu are rare, and this one is precious[[c:6]]; moreover it has high value as reference material for the study of the smith.[[c:7]]" Their provenance runs through the great daimyō houses: the three-character Shigetsugu saku tachi was transmitted in the Kishū Tokugawa family before passing to Hon'ami Kōson, another descended through the Tokugawa house to Tokugawa Iesato, and a third was held by Miyazaki Tomijirō of Kanagawa. So few of his blades survive, and so seldom does a signed Ko-Aoe Shigetsugu come to light, that a privately held example is a notable thing for a collector to encounter, valued less as an ornament than as a document of how the Aoe school worked in its earliest age.
Yasuyuki (安行) — Mainline · 1256-1257. Smith of the Bitchū Aoe School.
Hidetsugu (秀次) — Mainline · 1260-1261. Smith of the Bitchū Aoe School.
Koreshige (是重) — Mainline · 1233-1234. Smith of the Bitchū Aoe School.
Kuniyuki (国行) — Mainline · 1199-1201. Smith of the Bitchū Aoe School.
Sadatsuna (貞綱) — Mainline · 1150-1185. Smith of the Bitchū Aoe School.
Sanemori (眞守) — Mainline · 1219-1222. Smith of the Bitchū Aoe School.
Tametsugu (爲次) — Mainline · 1184-1185. Smith of the Bitchū Aoe School.
Tsugutada (次忠) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Tsugutsune (次恒) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Tsuguyori (次依) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Tsuguyoshi (次吉) — Mainline · 1238-1239. Smith of the Bitchū Aoe School.
Tsunekiyo (恒清) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tsunetsugu (恒次) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Tsuneyoshi (經義) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Yasutsugu (安次) — Mainline · 1171-1175. Smith of the Bitchū Aoe School.
Yori (頼) — Mainline · 1222-1224. Smith of the Bitchū Aoe School.
Yoritsugu (頼次) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Yukitsugu (行次) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Arihiro (在弘) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Arisue (有末) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Aritada (有忠) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Aritada (有忠) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Ariyuki (有行) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Ariyuki (有行) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Ariyuki (有行) — Mainline · 1213-1219. Smith of the Bitchū Aoe School.
Ariyuki (有行) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Chikanori (親則) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Chikatoshi (親利) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Fujitsugu (藤次) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Harutsugu (張次) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Hiromichi (弘道) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Hirotsune (弘恒) — Mainline · 1222-1224. Smith of the Bitchū Aoe School.
Hisatsugu (久次) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Kanenaga (包永) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Kanetsugu (兼次) — Mainline · 1288-1293. Smith of the Bitchū Aoe School.
Kanetsugu (包次) — Mainline · 1185-1190. Smith of the Bitchū Aoe School.
Kanetsugu (包次) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Kanetsugu (兼次) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Kanetsugu (包次) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Koreshige (是重) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Moritoshi (守利) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Moritsugu (盛次) — Mainline · 1224-1225. Smith of the Bitchū Aoe School.
Moritsugu (盛次) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Moritsune (守恒) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Morotsugu (師次) — Mainline · 1185-1190. Smith of the Bitchū Aoe School.
Morotsugu (師次) — Mainline · 1225-1227. Smith of the Bitchū Aoe School.
Morotsugu (師次) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Morotsugu (師次) — Mainline · 1288-1293. Smith of the Bitchū Aoe School.
Muneto (宗遠) — Mainline · 1207-1211. Smith of the Bitchū Aoe School.
Munetsugu (宗次) — Mainline · 1243-1247. Smith of the Bitchū Aoe School.
Munetsune (宗恒) — Mainline · 1213-1219. Smith of the Bitchū Aoe School.
Nagahisa (永久) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Nagamune (長宗) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Naoie (直家) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Naokage (直景) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Naotaka (直高) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Nariie (成家) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Naritaka (業高) — Mainline · 1222-1224. Smith of the Bitchū Aoe School.
Naritaka (業高) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Naritsugu (成次) — Mainline · 1213-1219. Smith of the Bitchū Aoe School.
Naritsugu (成次) — Mainline · 1233-1234. Smith of the Bitchū Aoe School.
Naritsuna (成綱) — Mainline · 1219-1222. Smith of the Bitchū Aoe School.
Narizane (業實) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Nobutsugu (延次) — Mainline · 1261-1264. Enji (延次) is counted among the representative smiths of Ko-Aoe in Bicchu Province, where swordsmiths of the Aoe group flourished centering their activity around Aoe and Manju in the lower basin of the Takahashi River. Sword reference works list multiple smiths of the same name within Ko-Aoe; the first generation is traditionally regarded as the son of Ko-Aoe Moritsugu, and the line continued down into the late Kamakura period. A surviving *tanto* bearing the date Genko 3 (1333) confirms a smith of this name active at the end of the Kamakura era. As noted in the *Shin Sarugaku-ki* of the early eleventh century, Kibi Province had long been known as a region of iron production, and "the swords of Bicchu" were already counted among the notable products of the provinces.
Works by Enji display a forging of tightly compacted *ko-itame-hada* with extremely fine *ji-nie* adhering thickly; in places a mottled, *chihan*-like complexion appears, and *midare-utsuri* stands out. The grain rises overall, taking on a *chirimen-hada* (crepe-like) texture. The *hamon* is fundamentally *suguha*, carrying a shallow *notare*, with *ko-ashi* entering; the *nioiguchi* tends toward a tightened appearance, is *nioi*-predominant with *ko-nie*, and is bright and clear. The *boshi* typically shows a *sugu* tendency, ending in *ko-maru*. Signed examples characteristically bear the *mei* on the *ha-ura* and exhibit large *o-sujikai* file marks -- conventions standard within the Ko-Aoe tradition. Earlier works present a *nie*-based suguha with a slightly subdued nioiguchi, mixed with small irregularities, while later-period examples show a calmer nie presence and a nioiguchi that tightens and becomes bright in the manner characteristic of late Kamakura Aoe workmanship.
Enji's works consistently reveal refined forging of excellent quality; the tightened nioiguchi suguha is well executed, and both *ji* and *ha* show a high degree of completion. Surviving signed examples are of great documentary value, allowing one to appreciate the smith's high level of technical capability and providing essential reference material for the study of both the Aoe school and this smith in particular.
Nobutsugu (信次) — Mainline · 1219-1222. Smith of the Bitchū Aoe School.
Nobutsugu (延次) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Norinari (則成) — Mainline · 1260-1261. Smith of the Bitchū Aoe School.
Noritsugu (則次) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Noritsugu (則次) — Mainline · 1243-1247. Smith of the Bitchū Aoe School.
Norizane (則實) — Mainline · 1219-1222. Smith of the Bitchū Aoe School.
Shigetsugu (重次) — Mainline · 1240-1243. Smith of the Bitchū Aoe School.
Shigetsugu (重次) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Sukenari (助成) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Tadakuni (忠國) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tadatsugu (旦次) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tadatsugu (亘次) — Mainline · 1199-1201. Smith of the Bitchū Aoe School.
Tadatsugu (但次) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tadatsugu (忠次) — Mainline · 1234-1235. Smith of the Bitchū Aoe School.
Tadatsugu (忠次) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Tadayasu (但安) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tadayasu (但安) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tamenobu (爲信) — Mainline · 1225-1227. Smith of the Bitchū Aoe School.
Tamenobu (爲信) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Tamenori (爲則) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tamenori (爲則) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Tameto (爲遠) — Mainline · 1243-1247. Smith of the Bitchū Aoe School.
Tameto (爲遠) — Mainline · 987-989. Smith of the Bitchū Aoe School.
Tametoshi (爲利) — Mainline · 1260-1261. Smith of the Bitchū Aoe School.
Tametsugu (爲繼) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tameyasu (爲安) — Mainline · 1240-1243. Smith of the Bitchū Aoe School.
Tameyoshi (爲吉) — Mainline · 1222-1224. Smith of the Bitchū Aoe School.
Tokikuni (時國) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tokisada (時貞) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tokitsugu (時次) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Tokizane (時眞) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Tomoto (知遠) — Mainline · 1213-1219. Smith of the Bitchū Aoe School.
Tomoto (知遠) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Tomotsugu (朝次) — Mainline · 1219-1222. Smith of the Bitchū Aoe School.
Tomotsugu (朝次) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Tomotsugu (友次) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Tomotsugu (友次) — Mainline · 1243-1247. Smith of the Bitchū Aoe School.
Toshitsugu (年次) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Totsugu (遠次) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tsuguari (次有) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tsuguhide (次秀) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tsuguhiro (次弘) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Tsuguhiro (次廣) — Mainline · 1233-1234. Smith of the Bitchū Aoe School.
Tsuguhiro (次廣) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Tsugukiyo (次清) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Tsugumori (次守) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tsugumune (次宗) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tsugunao (次直) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Tsugunobu (次延) — Mainline · 1207-1211. Smith of the Bitchū Aoe School.
Tsugunori (次則) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tsugutoshi (次利) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Tsugutoshi (次俊) — Mainline · 1233-1234. Smith of the Bitchū Aoe School.
Tsuguyori (次頼) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Tsuguyori (次依) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Tsuguyoshi (次吉) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Tsuguzane (次眞) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tsuguzane (次眞) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Tsuguzane (次眞) — Mainline · 1259-1260. Smith of the Bitchū Aoe School.
Tsuneie (恒家) — Mainline · 1227-1229. Smith of the Bitchū Aoe School.
Tsunekiyo (恒清) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Tsunemori (常森) — Mainline · 1222-1224. Smith of the Bitchū Aoe School.
Tsunemoto (恒元) — Mainline · 1259-1260. Smith of the Bitchū Aoe School.
Tsunemoto (恒元) — Mainline · 1243-1247. Smith of the Bitchū Aoe School.
Tsunenaga (恒永) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Tsunesada (恒貞) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tsunesue (恒末) — Mainline · 1238-1239. Smith of the Bitchū Aoe School.
Tsuneto (恒遠) — Mainline · 1257-1259. Smith of the Bitchū Aoe School.
Tsuneto (常遠) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Tsunetomo (常伴) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tsunetsugu (常次) — Mainline · 1207-1211. Smith of the Bitchū Aoe School.
Tsunetsugu (經次) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tsuneyori (常依) — Mainline · 1211-1213. Smith of the Bitchū Aoe School.
Tsuneyori (恒依) — Mainline · 1259-1260. Smith of the Bitchū Aoe School.
Tsuneyori (常依) — Mainline · 1213-1219. Smith of the Bitchū Aoe School.
Tsuneyori (常依) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Tsunezane (恒眞) — Mainline · 1225-1227. Smith of the Bitchū Aoe School.
Tsunezane (恒眞) — Mainline · 1233-1234. Smith of the Bitchū Aoe School.
Tsunezane (恒眞) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Tsunezane (恒眞) — Mainline · 1219-1222. Smith of the Bitchū Aoe School.
Yasuhiro (安弘) — Mainline · 1213-1219. Smith of the Bitchū Aoe School.
Yasutsugu (安次) — Mainline · 1199-1201. Smith of the Bitchū Aoe School.
Yasutsugu (康次) — Mainline · 1184-1185. Smith of the Bitchū Aoe School.
Yasutsugu (安次) — Mainline · 1211-1213. Smith of the Bitchū Aoe School.
Yasutsugu (安次) — Mainline · 1235-1238. Smith of the Bitchū Aoe School.
Yasutsugu (康次) — Mainline · 1233-1234. Smith of the Bitchū Aoe School.
Yasutsugu (康次) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Yoritsugu (依次) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Yorizane (依眞) — Mainline · 1234-1235. Smith of the Bitchū Aoe School.
Yoshitsugu (吉次) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Yoshitsugu (吉次) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Yukitoshi (行利) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Yukitoshi (行利) — Mainline · 1235-1238. Smith of the Bitchū Aoe School.
Yukitsugu (行次) — Mainline · 1199-1201. Smith of the Bitchū Aoe School.
Phase 2 · Chū-Aoe (中青江) · 1235 – 1334
The Chu-Aoe school represents the middle and culminating phase of the Aoe tradition of Bitchu Province, encompassing smiths active from the late Kamakura period through the Nanbokucho era. The lineage traces its origins to an ancient swordmaking heritage in the lower basin of the Takahashi River, a tradition already celebrated in the eleventh-century *Shin Sarugakki*, which counted "the swords of Bitchu" among the notable products of the provinces. Scholars conventionally distinguish earlier Ko-Aoe production, extending through the mid-Kamakura period, from the Chu-Aoe and later Sue-Aoe phases that carried the tradition forward. The name Sadatsugu -- transmitted since the *Kanchiin-bon Meizukushi* as one of the *goban-kaji* appointed to serve Retired Emperor Gotoba and accorded the highest valuation in the *Shinkan Hiden-sho* -- stands as the school's most prestigious lineage name, while Yoshitsugu, Naotsugu, Tsunetsugu, and Hidetsugu represent the principal working smiths whose signed and dated examples anchor the chronology of the late Kamakura Aoe group. With the transition into the Nanbokucho period, a second flowering emerged under Tsugunao, Tsuguyoshi, and Moritsugu, who are consistently identified by the NBTHK as the representative smiths of Aoe in that era.
The technical identity of Chu-Aoe is defined by a constellation of traits that recur with remarkable consistency across the school's members. The forging characteristically displays tightly packed *ko-itame-hada* mixed with *mokume*, upon which extremely fine *ji-nie* adheres thickly and delicate *chikei* are interwoven. A mottled, patch-like *jifu* texture frequently appears, and the distinctive crepe-like surface known as *chirimen-hada* is encountered among several smiths. Most diagnostic of all is the school's *utsuri*, which manifests in multiple forms: *midare-utsuri*, the stepped *dan-utsuri* in which linear utsuri near the edge transitions to midare-utsuri toward the *mune*, and the dark-toned *sumihada*. The *hamon* is fundamentally *suguha*-based, ranging from narrow *hoso-suguha* to medium *chu-suguha* with shallow *notare*, into which *ko-gunome*, *ko-choji*, and *saka-ashi* are mixed. The *nioiguchi* is universally described as tight, bright, and clear -- the single most defining quality of the school -- producing a deep *shio-ai* that is repeatedly praised in NBTHK assessments. The *boshi* characteristically runs straight, turning back in *ko-maru* with a tendency toward a pointed tip. A critical stylistic evolution occurred within the Nanbokucho period: while the late Kamakura smiths worked predominantly in suguha, the later generation developed a splendid, flamboyant *saka-choji-midare* that became the school's most celebrated mode. Tsugunao is recognized as "a master of saka-choji," producing tempering of such florid brilliance that the NBTHK characterizes it as "the exclusive forte of this group" -- an emblematic and highly individual domain. The reverse-slanting tendencies visible in earlier Kamakura-period works are understood as precursors to this splendid later development.
The Chu-Aoe school occupies a position of enduring prestige within the Japanese sword canon. The Hon'ami family developed a longstanding practice of rendering Sadatsugu appraisals for unsigned Aoe works of particularly fine workmanship, treating the name as a mark of the highest quality within the tradition. Naotsugu and Yoshitsugu, whose signed examples bearing official court titles and era dates from Gentoku through Kanno survive in exceptional condition, furnish irreplaceable documentary material for the study of Bitchu swordmaking. Works from the school have been transmitted through distinguished collections -- the Choshu Mori, the Nabeshima of Hizen, the Uesugi, and the Maeda of Kaga -- attesting to sustained appreciation across centuries. Naotsugu occupies a pivotal position at the transition from the *ko-nie-deki* manner of the Kamakura period to the tighter, brighter *nioi-deki* workmanship of the Nanbokucho era, while Moritsugu's rare surviving works bridge the late Kamakura and early Nanbokucho phases with tanto displaying both the traditional suguha and a saka-choji not previously encountered in the school. In both the quiet restraint of their suguha and the gorgeous brilliance of their saka-choji-midare, the smiths of Chu-Aoe demonstrate the Bitchu tradition at its most refined and accomplished -- a school whose tightly forged steel, luminous nioiguchi, and distinctive utsuri constitute an aesthetic achievement of the first order.
Tsugunao (次直) — Mainline · 1345-1361. Jūbun, Jūbi, Tokujū, Jūyō. Tsugunao of Bitchu stands with Tsuguyoshi and Moritsugu as a representative master of the Aoe school in the mid Nanbokucho period, and his record is unusually legible for that age: the published sources list extant dated works through the Jowa, Kan'o, Shohei, Bunna and Enbun eras (1345 to 1361), the center of his activity falling around Bunna and Enbun, and most pieces carry the long signature Bitchu no kuni ju Tsugunao saku[[c:1]] with the date cut on the reverse. The prewar designation record adds that this Tsugunao is said to have been a son of Yoshitsugu. Behind him the school divides in two. Ko-Aoe work, up to about the mid Kamakura period, is generally nie-based with a subdued nioiguchi and a large, standing hada; from the end of Kamakura the manner changes, and by the Nanbokucho period the published sources describe work that is nioi-based, with a vividly clear nioiguchi over a tightly packed ko-itame. Tsugunao belongs wholly to this later, clear-tempered Aoe, the line the sources call sue-Aoe, and he stands near its close.
The published sources state his work in a single recurring formula: two manners, one a flamboyant saka-choji-midare, the other a suguha with a tightened nioiguchi, both nioi-based and both executed at a high level. The first is the celebrated hand. One designation text speaks of "the saka-choji-midare that may be called Tsugunao's family art"[[c:2]], and another judges that this manner, its nioiguchi tight and so bright and clear, "was, within the Nanbokucho period, the sole domain of this school"[[c:3]] and its emblematic territory. In these blades saka-ashi and yo enter the ha frequently, the temper is nioi-dominant with ko-nie, fine kinsuji and sunagashi run through it, and the boshi comes in midare-komi, thrusts up, points and returns deeply. At its most flamboyant the midare can even leave the slant behind: an Enbun 6 naginata-naoshi, its choji lively in variation and rise and fall, is described as "a truly florid workmanship that recalls the Fukuoka Ichimonji", the single such comparison in his record.
The jigane beneath both manners is the school's own. Some blades retain what the published sources call the Aoe's original chirimen-hada, but most show a tightly packed ko-itame mixed with ko-mokume, ji-nie adhering thickly in fine particles, the peculiar mottled jifu the sources name namazu-hada, and clear patches of sumi-hada emerging here and there. On the finest pieces the reflection doubles: a midare-utsuri stands toward the mune while a straight band rises along the yakiba, together forming what the texts call dan-utsuri. The second manner rests on this steel. It is a chu-suguha, at times shading into shallow notare, mixed with ko-gunome and ko-choji, slanting here and there so that saka-ashi and yo enter even within the straight line; the nioiguchi is tight, bright and clear, and on a tachi dated Shohei 7 the sources note the fine nezumi-ashi. Famed though he is for the slanted midare, the designation texts repeat that "even when he tempers suguha he is skillful, and shows high technique", and one tanto in hoso-suguha is praised for a nioiguchi so crisply tightened and bright that it imparts a serene, restrained taste. Whichever manner he works, the sources observe, the boshi thrusts up with a pointed tip, a school tell that survives both hands.
The two manners divide largely by form. Of his tachi records nearly all, eleven of twelve, run to suguha, whether chu-suguha or hoso-suguha, while the flamboyant saka-choji is carried by the hira-zukuri blades, the sunnobi wakizashi and tanto of wide mihaba, thin kasane and shallow sori that wear the typical Nanbokucho silhouette, and by naginata-naoshi. His signing habits are themselves a study: the long mei with the date written down in one line, the kakikudashi-mei, is noted as not rare in the Aoe of this period, as is the rounded maru-mune construction; the southern court year Shohei 7 appears beside the northern Bunna and Enbun dates; and where most long blades of the period were later shortened into o-suriage mumei, his record preserves signed and dated tachi, among them an ubu blade of 89.8 centimeters dated Jowa 3. O-suriage mumei katana carry kinzogan attributions to Tsugunao by the Honami, Mitsutada or Kotsune, which the NBTHK upholds. The boundary of the name is drawn from the work itself: a tachi in gunome-dominant ha, unlike the choji-led temper of the Enbun-dated pieces, is read in Honma's recorded comment as "possibly later than the works with Enbun dates", and a hoso-suguha tachi is judged "probably a little later in date than the Enbun-dated works of Tsugunao", so the published record itself holds open the question of a later generation under the same name.
Within the school the manners divide between the masters: Tsugunao left more saka-choji-midare and Tsuguyoshi more suguha, and the sources write that "in this point he may be said to stand in contrast to Tsuguyoshi". What marks a blade as his are his own documented features in combination: the slanting set of the choji and ashi, the tight bright nioiguchi over a nioi-based ha, the sumi-hada and namazu-hada mottling in the packed ko-itame, the stepped dan-utsuri on the finest work, and the thrusting, pointed boshi. He stands at the close of the line the sources call sue-Aoe; no individual pupil is named in his record, but the blades judged later than his Enbun-dated work show the Tsugunao name carrying on past the prime master.
Fujishiro grades him Jo-jo saku, and twenty-seven designated works stand on record: three Important Cultural Properties, five Juyo Bijutsuhin, seven Tokubetsu Juyo and twelve Juyo. The provenance behind them runs through the great houses. The Maeda of Kaga held his Enbun 5 tanto as a treasure of the house, styled the Dai-Aoe (大青江) after the famous pair of Aoe meibutsu katana; a dated wakizashi formerly of the Yanagisawa is documented by the note on its old scabbard as the shogun Tsunayoshi's gift on his first visit to the Yanagisawa mansion in Genroku 4; a dated tachi descended in the Choshu Mori, a katana bears Mori Motoyasu's possession inscription in gold inlay beside the record of Umetada's shortening, another katana was transmitted in the Kishu Tokugawa house, and one tachi is accompanied by a letter of commendation of Tokugawa Hidetada together with its period uchigatana koshirae. The Important Cultural Property blades are patrimony, held by the Tokyo National Museum, the Tokugawa Art Museum and the NBTHK, and the Hayashibara Museum of Art holds one of the Juyo Bijutsuhin. For the private collector the realistic field is the nineteen blades of the Tokubetsu Juyo and Juyo tiers, most of recorded whereabouts in private hands; these are held rather than traded, and a signed, dated Tsugunao, of a kind the published sources themselves call rare among the survivors of this school and period, comes to market only seldom and is an occasion when it does.
Naotsugu (直次) — Mainline · 1335-1364. Jūbun, Jūbi, Tokujū, Jūyō. In Gentoku 2 (1330) Naotsugu (直次) of Bitchū signed a slender, high-koshizori tachi "Bitchū no kuni jū Sahyōe-no-jō Naotsugu saku"[[c:1]], the year cut in parallel on the shinogi-ji, and the NBTHK judges that title inscription with its date "valuable documentary material"[[c:2]] within his surviving work. He belongs to the Aoe school, which flourished along the lower reaches of the Takahashi river; the published sources open his records with the early eleventh-century Shin Sarugakuki (新猿楽記), which already lists "the swords of Bitchū"[[c:3]] among the famous products of the provinces. Work to about mid-Kamakura is called Ko-Aoe; what follows, into Nanbokuchō, simply Aoe. The Meikan places Naotsugu's activity around the Karyaku era (1326-29); he styled himself Saemon-no-jō and Sahyōe-no-jō, and with Yoshitsugu (吉次) he is counted among the representative smiths of the school from the very end of Kamakura into the opening of Nanbokuchō. His dated works begin with Gentoku, the oldest, and run across Jōwa and Kannō[[c:4]], Shōkei, Kenmu and Ryakuō standing between; the title heads the Gentoku and Kenmu pieces.
The foundation of his work is the suguha of this Aoe generation. Like the Aoe smiths of his time, the published sources note, his works are mostly built on a suguha basis[[c:5]], and in his hands that line is a hoso-suguha or chū-suguha, undulating only very shallowly, mixing a little ko-gunome, with ko-ashi, saka-ashi and yō entering. The nioiguchi is tight, carries a light ko-nie, and of one slender tachi the judges write that "both ji and ha are bright and brilliantly clear"[[c:6]]. The school's slanting habit rides in him on this quiet line rather than on a chōji-midare: saka-ashi recur from the Ryakuō tantō, where the rare nezumi-ashi also enters, to the monouchi of the broad den-Sahyōe-no-jō tachi, whose wide suguha admits gunome, ko-chōji and slanting, squarish elements. He holds to the narrow bright suguha more constantly than Tsugunao, the school's other great Nanbokuchō name. Activity beyond the line is sparing but fine: kinsuji on the Jōwa-dated tachi, and on the Gentoku 2 tachi fine sunagashi with uchinoke and yubashiri along the yakigashira, a deeply tasteful scenery at the edge.
The jigane is Bitchū's own. He forges a tightly knit ko-itame mixed with mokume, ji-nie thick and extremely fine, chikei entering minutely; jifu (地斑) mixes in again and again, the clear sumihada (澄肌) patches of the school appear, and a faint utsuri rises, sometimes a midare-utsuri, sometimes a thin straight utsuri close to the ha, and on the broadest tachi a jifu-utsuri forming dark bands. Of one two-character-signed tantō the NBTHK writes that the well-refined, tightly packed forging, ji-nie laid thickly and minutely, is exceptional[[c:7]]. The bōshi runs straight to a ko-maru return or tends to a point, at times lightly brushed with hakikake; the published sources warn that the shallow bōshi with its tip tending to point "must not be overlooked"[[c:8]], one of the important viewing points[[c:9]] of Aoe work in this period.
The signed and dated core of his work is remarkably consistent. His tantō are hira-zukuri with mitsu-mune, the kasane firm, the curvature absent or slightly inward; the Kenmu 2 (1335) tantō grows broad and slightly extended, the invocation Namu Kanzeon[[c:10]] on its ura, and the Ryakuō tantō is judged in both of its records an outstanding work within his oeuvre[[c:11]]. On ubu tantō the nakago takes the furisode form, and the steep ō-sujikai filing remains, "the viewing point of the school, vividly remaining"[[c:12]]; down the center runs a long mei struck deep with a thick chisel (太鏨), its reverse-chisel work so sharp that it, the published sources say, "carries on the Ko-Aoe tradition"[[c:13]]. Two tachi write the signature down the tang in a single line, and the den-Sahyōe-no-jō tachi is cut, unusually for this smith, in katana-mei, as both of its records note. The generation question stands as the sources leave it: the Jōwa-dated tachi is laden with ko-nie where Nanbokuchō Aoe work is generally nioi-deki, and so stands "close to the Kamakura-period work of the school"[[c:14]]; the Meikan, the same record adds, reads the Ryakuō and Enbun dates as a second generation[[c:15]], by which the Jōwa tachi would likewise fall to the second, while the designation records otherwise treat one representative Naotsugu across the passage.
A second register stands on Hon'ami authority. Three ō-suriage mumei katana, certified Jūyō Bijutsuhin between 1939 and 1947, carry the grand Nanbokuchō build, "broad in width and large in point, a bold and powerful figure"[[c:16]], their hamon turning gunome-predominant with saka-chōji and ko-midare: Hon'ami Kōon set his judgment in gold inlay, "Naotsugu, suriage kore, Hon'a"[[c:17]], and Hon'ami Kōshitsu attributed the katana of the Owari Tokugawa house. At the same edge stands the Shōhei 18 (1363) wakizashi made for one Murahashi Chōgo, its florid saka-chōji praised[[c:18]], its corroded signature transmitted as Naotsugu. Set against the school's arc, his place is the bridge. Ko-Aoe worked a ko-nie suguha with the nioiguchi slightly subdued; at the Nanbokuchō peak the nioiguchi tightens into bright, clear suguha and the characteristic saka-chōji-midare; and Naotsugu's quiet keen line, still carrying its ko-nie, stands immediately before that peak, the manner his mumei-attributed grand works adjoin.
Fifteen designated works stand on the official record: two Important Cultural Properties, a tachi and a naginata; three Tokubetsu Jūyō; seven Jūyō; and the three Jūyō Bijutsuhin katana, so that ten blades sit in the Tokubetsu Jūyō and Jūyō tiers. Twelve of the fifteen carry a mei; his name is anchored on those signed, dated pieces. The provenance recorded against his blades runs through the Tokugawa: the Reimeikai katana was the personal sword of Munechika (宗睦), ninth lord of the Owari Tokugawa, and remains with the Tokugawa Reimeikai; the gold-inlaid katana was held by Tokugawa Iesato at its certification; the third, once with Hon'ami Sumio, now belongs to the Sano Art Museum. Of recorded whereabouts they rest with the Tokugawa Art Museum, the Kyoto National Museum and the Sano Art Museum. The two Important Cultural Properties are preserved as cultural patrimony and will never trade; what a collector may realistically encounter is the Tokubetsu Jūyō and Jūyō tier, ten blades in all, and a signed, dated Naotsugu comes to the open market only rarely, a small and quiet masterpiece of the late Aoe suguha when it does.
Yoshitsugu (吉次) — Mainline · 1326-1332. Jūbun, Jūbi, Tokujū, Jūyō. In the eleventh month of Karyaku 3 (1328) Yoshitsugu (吉次) of Bitchū signed an ubu tantō "Bitchū no kuni jū Uemon no jō Taira Yoshitsugu saku"[[c:1]], an inscription the NBTHK judges of high documentary value. He belongs to the Aoe school, which flourished along the lower Takahashi river in a province the early eleventh-century Shin Sarugakuki already names for "the swords of Bitchū"[[c:2]]; work to about mid-Kamakura is called Ko-Aoe, what follows simply Aoe. The records name him, "together with Suketsugu, Yoritsugu and Naotsugu, one of the representative smiths of the school in this era"[[c:3]], and an older record calls him outright "the representative smith of the chū-Aoe"[[c:4]]. His dated works carry Karyaku (1326-29) and Gentoku (1329-31), and the residence in his long signatures is written now "Bitchū no kuni Aoe jū"[[c:5]], now "Bishū Manju jū"[[c:6]], a divergence the records expressly point out.
His foundation, and his declared strength, is the suguha of this generation at its calmest. Of the Karyaku 3 kodachi the judges write that it is "a blade in which the true mettle of Yoshitsugu, a smith whose forte is suguha, is displayed without reserve"[[c:7]]. The line is a chū-suguha, undulating shallowly in places, mixing ko-gunome, ko-chōji and ko-midare; ko-ashi and yō enter with saka-ashi among them, yet the slanting habit that marks the Aoe ha shows in him only partially, here and there. The nioiguchi tightens, carries ko-nie, and is bright and clear; fine kinsuji and sunagashi run through, and intermittent yubashiri near the base raises a nijūba-like effect. On the tantō the line narrows to a hoso-suguha with fine hotsure, the temper carried down through the hamachi, a habit shared also by the Gentoku 1 tantō of Sahyōe no jō Naotsugu[[c:8]]; of the Karyaku 3 tantō the record writes that the quiet suguha yakiba "overflows with a deep savor"[[c:9]].
The jigane is Bitchū's own. He forges a well-knit ko-itame mixed with ko-mokume and flowing hada, the ji-nie thick and extremely fine, minute chikei entering; jifu (地斑) recurs blade after blade, the clear sumihada (澄肌) of the school appears, and on the gold-inlaid Nabeshima katana the finely standing ko-itame takes on a crepe-like complexion[[c:10]]. Over this a faint midare-utsuri rises, and on the small works the utsuri divides, "a midare-utsuri toward the mune and a linear utsuri toward the ha"[[c:11]], the so-called dan-utsuri (段映り). The bōshi runs straight to a ko-maru return, at times tending to a point or lightly brushed with hakikake. Of the niji-mei tantō the judges write that the scenery of the utsuri and the tight, bright nioiguchi of the suguha are "Aoe through and through"[[c:12]].
The signed and dated core of his work is anchored on the title. He often cut long signatures headed Uemon no jō with the Taira clan name; among the signed reference works the published sources name a tachi in the Tokyo National Museum dated Gentoku 2 and a katana-mei blade at Hie Shrine, both Important Cultural Properties. His small works are rare survivals, "surviving examples of Yoshitsugu's tantō are exceedingly rare"[[c:13]], and the signed kodachi is likewise a form seldom seen in the school. A two-character mei cut on the haki-ura of one slender tachi is read as his earlier work, predating the long-signature pieces. At the far edge of the name stands a generation question: the Jūyō Bijutsuhin record matches the folded-signature katana of the Owari Tokugawa, a wide work in gunome-deki, to the Yoshitsugu the Meikan places in Nanbokuchō around Jōwa (1345-50), and calls the smith of the Karyaku tantō "presumably his predecessor"[[c:14]]; Honma adds the caveat that "appraisals to individual names within Aoe will always invite both assent and dissent"[[c:15]]. The designation records meanwhile draw the line by manner, noting of his quiet suguha tantō that "they differ in feeling from the works of the school of the Nanbokuchō period"[[c:16]].
A second register stands on kiwame. Ō-suriage mumei katana of deep curvature and ample hiraniku carry his attribution. The Nabeshima katana bears a gold-inlaid attribution, not a signature, recording its shortening in Genna 5 (1619), and its workmanship is judged "the typical late-Kamakura make of the Aoe school in both ji and ha"[[c:17]]. The mumei katana under a Kyōhō 9 (1724) origami of Hon'ami Kōchū, valued at 150 kan, is judged "an outstanding piece even among the Yoshitsugu attributions"[[c:18]], "a robust figure, heavy in the hand"[[c:19]]. The kiwame are honest: of the katana descended in the Naitō family the judges write that at a glance it might also be appraised as Bizen Motoshige or the like, "and it is difficult to assert Yoshitsugu definitively"[[c:20]], while holding it a late-Kamakura Aoe blade. Within the school his place is the quiet pole of the generation: where Naotsugu signs Sahyōe no jō, Yoshitsugu answers with Uemon no jō (右衛門尉) and the Taira name, and where the slanting chōji of Aoe comes out in force elsewhere, his blades keep the calm bright line, the saka element only glimpsed.
He is rated Jō-jō saku by Fujishiro, and seventeen designated works stand on the official record: two Tokubetsu Jūyō and ten Jūyō, twelve blades in those two tiers; three Jūyō Bijutsuhin; one Important Cultural Property, a signed blade preserved at Fujishima Jinja; and a signed blade, once of the Imperial Family and the Mōri family, now in the Kyoto National Museum. Eleven of the seventeen carry a mei, five are mumei under kiwame, and the Nabeshima katana carries its attribution in gold inlay. The provenance runs through great houses: the gold-inlaid katana descended in the Hizen Ogi branch of the Nabeshima family, recorded in the Tsuchiya Oshigata as "an ancestral sword worn at the first assault on Hara castle"[[c:21]], the blade of the Shimabara rising; the Naitō katana of Murakami carries the family tradition "Aoe Yoshitsugu bestowed by the Taikō"[[c:22]], received from Hideyoshi at the Odawara campaign of 1590; the folded-signature katana descended in the Owari Tokugawa and remains with the Tokugawa Reimeikai; the Karyaku-dated Jūyō Bijutsuhin tantō now belongs to the Sano Art Museum. The Important Cultural Property and the shrine and museum pieces are preserved as cultural patrimony and will not trade; a collector may realistically encounter the Tokubetsu Jūyō and Jūyō tier, twelve blades among them the dated tantō and tachi and the quiet suguha katana under kiwame, and one comes to the open market only rarely, a quiet masterpiece of the Aoe suguha at its calmest when it does.
Moritsugu (守次) — Mainline · 1356-1361. Jūbun, Jūbi, Tokujū, Jūyō. Moritsugu is an Aoe smith of Bitchū, his name traditionally derived from Yasutsugu, the founder of the Aoe lineage, and carried by several hands from the Ko-Aoe period down into the Nanbokuchō. The published sources are careful with the name: the Meikan lists more than one smith called Moritsugu even within Ko-Aoe, and the name passed on afterward, so that surviving works range from blades judged to the end of Kamakura through dated pieces of the Bunwa and Enbun years in the middle of the Nanbokuchō. His record falls into two faces, an early powerful tachi and a group of dated late tantō, and of the latter the commentary on one Enbun piece says plainly that this is the work of the last bearer of the name, 'the Moritsugu who brought that tradition to its close'[[c:1]].
The hand that runs through both faces is a calm, bright *suguha*. On the late tantō the temper is *nioi*-dominant and clear, the *nioiguchi* drawn tight, *ko-nie* gathered along it; one Bunwa tantō the published record calls a textbook of Nanbokuchō Aoe *suguha* work. On the early tachi the same line is a *suguha* base into which *ko-gunome* and *ko-chōji* are set, *ko-ashi* entering, fine *kinsuji* running, the *nioiguchi* bright. The judges single out this quality above all: the way a tight, bright *suguha* is tempered to produce a deep *shio-ai*, a salt-like depth in the hardened edge, they call 'superb'[[c:2]], and from it 'the high technical level of Moritsugu can be perceived'[[c:3]].
The *jigane* is the Aoe steel at two strengths. On the early two-character tachi it is a *ko-itame* mixed with *ko-mokume*, the grain finely standing, *ji-nie* adhering throughout in fine particles, *chikei* entering, and from the *hamon* boundary a somewhat faint *midare-utsuri* rising, the most refined *jigane* in his record. On the dated tantō the forging stands a little more, an *itame* that at times flows, mixed with *jifu* and *chihan*-like mottling, with a clear *utsuri* over it. The *bōshi* on both is essentially straight, turning back in a *ko-maru*, sometimes with *hakikake*, and on the tachi a *bō-hi* is carved through into the tang.
Within the dated work the published sources draw the period's central observation. The Aoe of this generation, they note, shows little conspicuous *nie* and becomes for the most part *nioi-deki*, and in it 'there are two manners, the traditional *suguha* and a splendid *saka-chōji* not seen before'[[c:4]]. Moritsugu's own work belongs to the first of these, the traditional *suguha*; the second, the reverse-slanting line, touches his hand only in the *saka*-inclined *gunome* of his Jūyō Bijutsuhin tantō, where the temper is a moist *nioi-deki* with reverse-leaning *gunome* mixed in. His shapes are of their moment: the early tachi wide and powerful with high *koshizori*, thick *kasane* and *funbari* in the Kenmu manner, the tantō *hira-zukuri* with a *sun-nobi* feeling or a faint *uchizori*, and one rare *shōbu-zukuri* piece the sources note as unusual for the smith and the school alike. Several of the tantō carry a *sankō-ken* or *goma-bashi* devotional carving in the groove.
What sets him within the school is the very thing the judges name. Against the flamboyant *saka-chōji* the late Aoe was then inventing, Moritsugu keeps the school's older line, a bright *midare-utsuri* over a fine *ko-itame* and a tight, luminous *suguha*. His powerful early tachi belongs to the classic Aoe manner of *suguha* and *utsuri*, while the dated tantō bring the long Moritsugu name to its end; one of his blades is judged so close in workmanship to the school's standard that its claim rests on era and lineage as much as on a personal tell. The strongest external anchor is documentary: the published sources find that the manner of cutting the signature on his finest tachi matches exactly the hand of the tachi long held by the Uesugi family, the Important Cultural Property known as the Rinpō Tachi, differing only in that his *bō-hi* carried through the tang forced the signature onto the *hira-ji* rather than toward the *mune*.
For the collector he is a rare and quiet name. Fujishiro grades him Jō saku; the Tōkō Taikan values his work in the upper-middle range. He has no National Treasures. His record runs instead through the Important Cultural Property tier, three blades among them, one Special Jūyō tachi and four Jūyō, with a single prewar Jūyō Bijutsuhin tantō, so that nine designated works stand on record. The most storied of them, the Rinpō Tachi descended through Uesugi Kenshin and his house, is preserved in the Tokyo National Museum, patrimony rather than property; the Jūyō Bijutsuhin tantō was certified in the Suzuki collection of Yamagata. Of the remainder the Special Jūyō and Jūyō tachi are the pieces that survive in private and recorded hands, and even these come to light only seldom, since extant Moritsugu of this period are few. A signed Aoe Moritsugu reaching a collector is an uncommon event, and a document of how the Aoe school carried its old *suguha* down to the close of its line.
Tsuguyoshi (次吉) — Mainline · 1338-1358. Jūbun, Tokujū, Jūyō. Tsuguyoshi is an Aoe smith of Bitchū Province, working in the Nanbokuchō period, whom the published sources rank alongside Tsugunao and Moritsugu as "one of the representative smiths of the Aoe school in the mid-Nanbokuchō period." The blades gathered under his name are signed and dated across the 1340s and 1350s, the years of Ryakuō, Jōwa, Kōō and Enbun, and the published commentary treats these dated, *ubu* pieces as valuable documentary material for the study of the smith and his school. He stands at a turning point in the long Bitchū story the same sources recall, in which the early-eleventh-century travel miscellany *Shin Sarugakki* already named "the swords of Bitchū" among the noted products of the provinces, and the Aoe smiths who flourished along the lower Takahashi River two centuries later inherited that reputation. Where their late-Kamakura work calmed and the Nanbokuchō work tightened, Tsuguyoshi is one of the hands in whom the school's clear, bright temper reaches its height.
His characteristic manner is the *suguha*, and the sources make the point as a plain rule of kantei: broadly "Tsuguyoshi tends to produce *suguha*, while Tsugunao more frequently shows reverse *chōji-midare*"[[c:1]], with a tight, bright *nioiguchi* shared between the two. His is a *chū-suguha* or a slender *hoso-suguha*, shallowly *notare*, into which small *ko-gunome*, occasional *ko-chōji* and angular elements enter, carried by *ko-ashi*, *yō* and a faint reverse-slanting tendency. The temper is *nioi*-dominant with *ko-nie*, fine *kinsuji* and *sunagashi* running within, and above all the *nioiguchi* is bright and clear. One Aoe wakizashi is called a typical example of the *suguha* associated with him, and of his signed *naginata-naoshi* the published sources say it shows "the working range of *suguha* in which the smith fully demonstrates his forte"[[c:2]], the *chikei* entering more conspicuously than in his usual production. The *bōshi* runs straight into a *ko-maru*, at times rising above the *yokote*, occasionally finishing in *hakikake* or *yakitsume*.
The *jigane* is the constant. He forges a well-packed *ko-itame* mixed with *mokume*, the grain at times finely standing, with very fine *ji-nie* set thickly in *mijin* and delicate *chikei* entering well; in places a *jifu*-like complexion and patches of *sumihada* appear, the speckled tells of the Aoe *jigane*. Over it a *midare-utsuri* stands toward the *mune*, and on his finest blades parallel streaks of *suji-utsuri* rise near the edge as well, the two layering into a banded *dan-utsuri*. The published sources name this their distinctive mark: of one dated Jōwa tachi they write that "the *midare-utsuri* appearing close to the cutting edge is a hallmark peculiar to this tradition"[[c:3]]. It is the *utsuri*, more than any flourish in the temper, that carries the eye on his blades.
Within his record the sources draw two further faces. One is a small group of pieces judged not from the school's Nanbokuchō height but from the very end of Kamakura into the early Nanbokuchō: of standard *mihaba* with little taper, the curvature high with *koshizori* and added *saki-zori*, the *chū-kissaki* not yet greatly extended, a form read as marking the entry into the new age, the same tight *suguha* and *dan-utsuri* over a closely packed *ko-itame*. The other is the reverse-leaning touch. The flamboyant *saka-chōji-midare* the sources hold more characteristic of Tsugunao is largely absent from his own blades, yet a reverse tendency enters his *suguha* as *saka-ashi* and a *gyaku-chōji* flavor: one *ō-suriage mumei* katana attributed to him widens into a *suguha* with reverse-slanting *ashi* and *gyaku-chōji* and a *midare-komi bōshi* that rises to a pointed turn, and the Important Cultural Property tachi recorded under his name, a long signed and dated blade, is described with a *ko-midare* and *gyaku-chōji* temper, the most pronounced of its kind on his record.
What sets him within the school is exactly what the judges name. His tang is filed in the *ō-sujikai* of the Aoe convention, the long signature often cut on the *haki-omote* toward the *mune* with the date written descending, a habit the sources call typical of Nanbokuchō Aoe work. Against Tsugunao he is the *suguha* hand; against Ko-Aoe, whose *suguha* is *ko-nie-deki* with a somewhat subdued, *shizumi nioiguchi*, his is the brighter, tighter, clearer temper of the later school. The published sources gather him with Tsugunao and Moritsugu as "one of the representative smiths of the mid-Nanbokuchō Aoe school"[[c:4]], and praise the broad, unhurried temper of one Jūyō tachi as full of commanding spirit, a work in which "the highlights of this smith, who excelled in *suguha*, are shown without omission"[[c:5]].
For the collector he is a documented Nanbokuchō name whose signed, dated blades survive in fair number. Fujishiro's rating is not recorded; the *Tōkō Taikan* values him in the upper-middle range. He has no National Treasures. His record runs instead through one Important Cultural Property, a long signed and dated tachi, and the higher modern tiers, one blade papered to the Tokubetsu Jūyō and some eighteen to Jūyō. His provenance is sparing and honestly so: an *ō-suriage mumei* katana attributed to him was transmitted in the Mito Tokugawa family, and the rest are held in private and institutional collections of recorded but partial whereabouts. Of the blades that can change hands, most are held rather than traded, so a signed Tsuguyoshi comes to market only from time to time and a dated, *ubu* example is a notable thing to encounter, valued, as the sources repeat, as reference material for understanding the range of his work.
Yoshitsugu (吉次) — Mainline · 1329-1331. Jūbun. Yoshitsugu is identified as the first generation of the Naka-Aoe school, one of the representative smiths of the Aoe group in Bitchu Province during the late Kamakura period. His full signature reads "Bitchu no Kuni Aoe-ju Uemon no Jo Taira Yoshitsugu saku," and he is known to have frequently cut long inscriptions accompanied by date markings. Dated works survive from the Gentoku (1329--1331), Karyaku (1326--1329), and Kenmu (1334--1338) eras, establishing his active period with unusual documentary precision. Among his most notable pieces are a *tachi* in the Tokyo National Museum designated as an Important Cultural Property and another Important Cultural Property at Hie Shrine, the former bearing a *tachi-mei* and the latter a *katana-mei*.
Yoshitsugu's forging characteristically shows a tight *ko-itame* mixed with *ko-mokume*, forming a dense, standing texture with fine *ji-nie* and delicate *chikei*; *jifu* are intermingled, and a deep *kanairo* tone pervades the clear steel, occasionally with *sumi-hada* and a tendency toward *nagare-gokoro*. His *hamon* is fundamentally *suguha*-based, mixed with small *midare* and, in certain works, a hint of *gunome-choji*; the temper is laid with *nioi* and deeply adhering *ko-nie*, with *ashi* and *yo* entering abundantly. In the upper portions of certain blades, *yubashiri* and *tobiyaki* appear, giving rise to a *nijuba*-like tendency, while above the *monouchi* the temper may become *choji-gakari* and somewhat gorgeous. The *boshi* ranges from deeply tempered with a *kaen*-like tendency to *midare-komi* turning in *ko-maru*.
The NBTHK assessments consistently praise the excellence of Yoshitsugu's forging, noting that even among his own works certain examples are conspicuous for the quality of the *jigane*. His blades are said to "excellently demonstrate the characteristics of this school," and their remarkably healthy condition is repeatedly commended. The preservation of *ubu nakago* with long *mei* in fine chisel work is noted as valuable reference material. With pieces held in the Imperial Collection presented to Emperor Meiji by the Mori family, Yoshitsugu occupies a distinguished position within the Aoe tradition as a smith whose dated, fully signed works anchor the chronology of the Naka-Aoe school.
Sadatsugu (貞次) — Mainline · 1346-1376. Jūbi, Tokujū, Jūyō. A wakizashi dated Shōhei 5 (1350), signed in full as Ōsumi no Gon no Suke Taira Sadatsugu of Bitchū Province and long held in the Naitō house of Nobeoka, fixes the Sadatsugu of this entry in time: not the early-Kamakura Ko-Aoe smith of the same name, but the Nanbokuchō continuation of the Aoe line in Bitchū. The published sources treat Sadatsugu as one of the representative houses of Aoe, the name carried in unbroken succession from the close of the Heian period down through the Nanbokuchō era. Within that long descent they recognize several distinct smiths working in different generations under the single name, a point the NBTHK states outright when it observes that within the Bitchū Aoe line 'multiple smiths of the same name are recognized'[[c:1]]. The most individual of the Nanbokuchō hands is Ōsumi no Gon no Suke Taira Sadatsugu, whose dated works run from Genkō through Shōhei and whom the published sources call a smith who 'reflects a notably strong individuality in his workmanship even within his school'[[c:2]].
His recognized work is the *hira-zukuri* tantō and wakizashi, wide in body and *sun-nobi*, thin in *kasane* with shallow *sori*, the bold and powerful shape of the Nanbokuchō peak. Over a *ko-itame* mixed with *mokume* whose grain stands finely into the so-called *chirimen-hada*, with minute *ji-nie*, *chikei*, and patches of clear *sumi-hada*-toned *jifu*, he takes the *suguha* broad, mixing in slight *ko-chōji*. The *nioiguchi* is tight and somewhat subdued, with thick *ko-nie*; *ashi* and *yō* enter densely, carrying the inward-slanting *saka-ashi* of the school. The most striking thing his judges name is what happens inside the temper. The *nie* gathers and condenses into *shima-ba*, islands of hardening within the *ha*; *kinsuji* and *sunagashi* are active; and the *bōshi* turns back in a *ko-maru* tempered deeply and long down the side. It is this that the published sources mean when they write that 'a certain bold, uninhibited flavour overflowing with vigour is why he is said to be an atypical presence within his school'[[c:3]].
The *jigane* is the constant beneath that activity. The forging is a tightly worked *ko-itame* with *mokume*, the grain standing finely to a crêpe-like *chirimen* texture, into which enter fine *ji-nie* in minute particles, delicate *chikei*, and the *sumi-hada*-toned mottling that the published sources call the clear-steel patches of Aoe; over it a faint, *midare*-leaning *utsuri* rises. The carving program on the tantō is devotional and economical, a *bonji* seed-syllable with a *suken* or *gomabashi* cut beneath it and run off; the long signature sits centrally in somewhat thick chisel, and the file marks are the steep *ō-sujikai* of Bitchū. These last two, the *ō-sujikai* tang and the *ha-ura* reverse-chisel manner of the inscription, are the tang tells the published sources set against the Bizen file when they place a blade with Aoe rather than its near neighbour.
The Sadatsugu name in the Nanbokuchō does not resolve to one man. A second body of signed work, dated through Jōji, Eiwa, and Kōryaku, is by a different and slightly later smith whom the published sources connect with the title Saiga Tarōbyōe no Jō, a maker known for cutting comparatively small signatures and favouring a calm, low-tempered straight *hamon*. His tantō and *naginata-naoshi* run a narrow *hoso-suguha* over a *ko-itame* that flows toward the edge, the *nioiguchi* tight with *ko-nie*, the edge breaking into *hotsure*, the *bōshi* a small *maru* or a *yakizume* finish. One such wakizashi the judges read as sharing a common thread with neighbouring Ko-Mihara in its standing *nagare-itame* and the *hotsure* of its fine *suguha*, yet on close view deeper and more active in the *ha*, and so affirmed as Aoe. The third face of the record is the *ō-suriage mumei* or gold-inlaid *naginata-naoshi* judged Sadatsugu, and the NBTHK explains the practice plainly: because Aoe Sadatsugu has been held first-rank since the *Kanchiin-bon Meizukushi*, with the *Shinkan Hiden-shō* valuing Bitchū work at the supreme grade, there is an old habit of attributing a typical, finely made unsigned Aoe blade to him. On the *Ebi Kusari-giri* *naginata-naoshi* they make it explicit, that such a gold-inlaid 'Sadatsugu' does not point to the Ko-Aoe smith himself but uses the name 'in the sense of a representative superior work of the school'[[c:4]].
What sets this Nanbokuchō Aoe apart is exactly what the published sources name as its own. Where the work resembles its neighbours it is by tradition rather than by borrowing: the standing *itame* with *jifu* and *ji-nie* is the Aoe *jigane*, and the temper, the judges write, follows 'what may be called the Aoe tradition, a *suguha* into which *saka-ashi* enter'[[c:5]]. On the *ō-suriage* attributions a bright *midare-utsuri* stands clear, and over it a *suguha* mixed with *ko-chōji*, *ko-gunome*, and small *midare* takes a *saka-gakari* turn, *nioi*-dominant and bright, *kinsuji* and *sunagashi* fine. The inward-slanting feet and clusters, the clear *utsuri*, and the bright tight *nioiguchi* are the marks that hold a blade to Bitchū and away from the Bizen *chōji* it might otherwise be mistaken for; against the famed Ko-Aoe name the surviving signed and attributed work is read.
For the collector Sadatsugu is a scarce Nanbokuchō name rather than a common one. Fujishiro grades him Jō saku. He has no National Treasures and no Important Cultural Properties; his record runs instead through one Tokubetsu Jūyō and fourteen Jūyō, with one prewar Jūyō Bijutsuhin, sixteen designated works in all on record. The published sources call the Shōhei 5 Ōsumi no Gon no Suke wakizashi a *kessaku* and the very finest among his works, sound in both *ji* and *ha*, and note that as surviving examples by this smith are few the dated pieces carry high documentary value. His blades descend through documented houses: the Tokubetsu Jūyō wakizashi in the Naitō family, lords of the Nobeoka domain in Hyūga; a dated wakizashi held by the Onuki family, hereditary chief retainers of the Satake lords of Akita; and two of the gold-inlaid *naginata-naoshi*, bearing the names *Kitakaze* and *Ebi Kusari-giri*, owned by Miura Shōgen, a senior retainer of the Kishū Tokugawa, one of them received from the prelate Tenkai. With only a small number in the Tokubetsu Jūyō and Jūyō tiers, a signed Aoe Sadatsugu comes to market only seldom, and a privately held example is a notable thing for a collector to encounter, a document of how the celebrated Aoe name was carried into the Nanbokuchō age.
Yorizane (依眞) — Mainline · 1368-1375. Jūbun. Smith of the Bitchū Aoe School.
Naotsugu (直次) — Mainline · 1288-1329. Tokujū, Jūyō. In Gentoku 1 (1329), in the twelfth month, Naotsugu (直次) of Bitchū signed a small hira-zukuri tantō "Bitchū-shū jū Sahyōe-no-jō Naotsugu"[[c:1]] with the date cut on the reverse, and the NBTHK calls it a fine piece that demonstrates the smith's high technique[[c:2]]. He belongs to the Aoe school of Bitchū, which forged along the lower reaches of the Takahashi river. The published sources divide its production in two: work to about the middle of Kamakura is called Ko-Aoe, and what follows, on into Nanbokuchō, simply Aoe. The Meikan places Naotsugu's activity around the Karyaku era (1326-29); he styled himself Saemon-no-jō and Sahyōe-no-jō, and together with Yoshitsugu he is counted among the representative smiths of the school in the passage from the very end of Kamakura into the opening of Nanbokuchō. His base, as the published record says of the Aoe smiths of this time, is suguha, with many of his blades built fundamentally upon it.
What distinguishes the hand is a controlled chū-suguha rather than the flamboyant chōji of an earlier Bizen. The nioiguchi tightens and brightens, ko-gunome and small angular gunome enter the temper, and faint ashi run toward the base with the reverse slant the school is known for, the saka-ashi that the published sources read as the mark of so-called Sue-Aoe. On the widest of his katana the edge is a naka-suguha with a tight nioiguchi, saka-ashi, ko-ashi and yō, and the nioiguchi is bright and clear; the bōshi rises a little before its return, a slight tsukiage that ends in a pointed turn. He keeps the suguha quiet and lets the jigane and the slant carry the work, and on the Kitaguchi katana the judges find in all of these points the characteristic features of this craftsman and his school[[c:3]].
The jigane shows the Bitchū steel at full strength. A ko-itame mixed with mokume tightens into the so-called chirimen-hada, the crêpe-like surface texture of the school, and through it run the patchy jifu and the clear sumihada patches that are among Aoe's surest tells. On the tantō the forging packs down finely, thick ji-nie gathers, and a faint midare-utsuri rises across it; on the unsigned katana the grain stands more openly, with sumihada mixed in and a rather coarse nie on the edge. The temper on the Gentoku tantō is carried down into the ha-machi, a yakikomi the judges single out, and the bright, clear sharpness of its nioiguchi is what they note above all, the hardened edge keeping its line tight and luminous[[c:4]]. The bōshi runs straight or with a shallow notare and turns back in a ko-maru or, more characteristically, with the tip drawn to a point.
His surviving work falls into two registers by form. The signed and dated pieces are the documentary core: the Gentoku 1 tantō headed by the Sahyōe-no-jō title, ubu with the long mei cut by a slender chisel and the date on the reverse, and the wide-bodied katana signed "Bitchū no kuni jūnin Naotsugu saku," their long signatures preserved through shortening by being folded back into an orikaeshi-mei. The published sources note that among his works the signatures including the Sahyōe-no-jō title are rare[[c:5]], the surviving examples of that type carrying dates of Gentoku, Shōkei and Kenmu, so the office title and the year together fix both the man and the moment. The second register is the shortened tachi attributed to him by sight, ō-suriage and mumei or with only a fragment of the province inscription left at the tang tip; here the faint, reverse-slanting ko-ashi on a standard chū-suguha are read as the well-expressed mark of Sue-Aoe, the attribution and the period alike judged secure. The Meikan reads a first and a second generation under the name, the second dated Ryakuō into Enbun, a two-generation theory the judges cite without forcing a division of the surviving blades.
What sets him apart within the school is stated in his own work rather than borrowed from a comparison. The published sources call one tantō a clear expression of the characteristics of the late-Kamakura Aoe school, Naotsugu in particular[[c:6]], and another the very type of the late-Kamakura suguha Aoe blade[[c:7]], the ko-maru bōshi and the steep ō-sujikai filing named as the school's own viewing points. His chū-suguha with its quiet reverse slant stands just before the school's Nanbokuchō peak, where the suguha turns to nioi-deki and the characteristic saka-chōji-midare appears; his manner is the standard Sue-Aoe work that the peak would carry further. On the unsigned katana attributed to him the judges find the jigane good and the workmanship good[[c:8]], allowing only that the nioiguchi shows a slight cloudiness, and they note that the former tachi silhouette and the workmanship make both the period assessment and the attribution untroubled. The bare two-character mei and the ō-sujikai file marks of the Niigata tantō are called typical, the signature characters and the filing alike following the established conventions of the school[[c:9]].
The record that survives him is small and almost wholly in the designated tiers. Five of his blades carry an official designation, two of them Tokubetsu-Jūyō and three Jūyō, and Fujishiro rates him Jō-saku; the published sources praise the quality of execution repeatedly, the Kitaguchi katana judged thoroughly healthy in both ji and ha[[c:10]] and the Tokubetsu-Jūyō katana a piece that clearly expresses the style of the Aoe school of this period, of particularly excellent workmanship[[c:11]]. No National Treasure or Important Cultural Property stands among them, and his blades carry no recorded provenance in the daimyō houses, so what a collector may realistically encounter is one of the Tokubetsu-Jūyō or Jūyō pieces: a signed and dated tantō in which the late-Kamakura Aoe manner is set down whole, or a shortened katana whose folded-back signature still names the smith. They come to light only from time to time, and a signed and dated example, ubu and clear in both its characters and its file marks, is the kind of thing the published sources themselves treat as material of high documentary value.
Hidetsugu (秀次) — Mainline · 1312-1317. Tokujū, Jūyō. Saemon no Jo Hidetsugu was a swordsmith of the Aoe school active in Bitchu Province during the late Kamakura period, with dated works bearing era names such as Kagen, Enkyo, and Showa. Sword reference compendia record him as signing "Bitchu no Kuni Manju no Sho ju Saemon no Jo," and note that the name Hideji was transmitted in successive generations — one tradition holding that Hideji was a son of Tsugatada, another that he was a son of Tsuguhide. The Aoe lineage, flourishing chiefly in the lower basin of the Takahashi River, inherited a reputation for Bitchu swords noted as early as the eleventh-century *Shin Sarugaki-ki*. Works up through roughly the mid-Kamakura period are classified as Ko-Aoe, while those thereafter through the Nanbokucho period are grouped broadly under the name Aoe.
In forging and hardening, works by this smith display the hallmarks of the mature Aoe tradition. The *kitae* shows tightly forged *ko-itame-hada* with extremely fine *ji-nie* and distinct *midare-utsuri* standing in the ground. The *hamon* is fundamentally *suguha*, mixed with *gunome*, angular elements, *ko-choji*, and *ko-gunome*; *ashi* and *yo* enter abundantly, with *saka-ashi* interspersed and *ko-nie* attaching. Fine *kinsuji* and *sunagashi* run through the temper, and the *nioiguchi* is bright and clear. In certain works the *nie* presence becomes calmer and the *nioiguchi* tightens, reflecting the stylistic transition from the late Kamakura into the Nanbokucho period that characterizes this school's later output.
Extant signed works by smiths bearing the Saemon no Jo title within the Hideji line are rarely encountered, and those that survive in *ubu* condition with dated inscriptions hold particular documentary value. The *kaki-kudashi* style of date inscription seen on certain examples is a feature observed within the broader Aoe group and represents precious evidence for research into both the individual smith and the school. These blades demonstrate a markedly superior workmanship that plainly reveals the high technical level of Saemon no Jo Hidetsugu, and they serve as important reference material for the study of Bitchu Province sword production in the late Kamakura period.
Sadatsugu (貞次) — Mainline · 1334-1338. Tokujū, Jūyō. Sadatsugu is one of the most celebrated names of the Aoe school of Bitchu Province. Transmitted since the *Kanchiin-bon Meizukushi* as a smith selected among the *ban-kaji* appointed to serve Retired Emperor Go-Toba, Sadatsugu is accorded the highest valuation in the *Shinkan Hiden-sho*, recorded as "Bitchu objects, supreme: fifteen *kan*,"[[c:1]] and has thus long been regarded as first rank even among Aoe works. The name was carried on from the early Kamakura period through the Nanbokucho period, encompassing multiple generations. So great was the esteem attached to this lineage that the Hon'ami family developed a longstanding tendency, when encountering well-made unsigned Aoe works that display a typical manner and particularly fine workmanship, to render Sadatsugu appraisals in the sense of denoting an Aoe piece of superior quality.
The technical character of works attributed to Sadatsugu is firmly rooted in the Aoe idiom of the late Kamakura period. The forging presents *itame-hada* mixed with *mokume* in which the grain stands out finely; extremely fine *ji-nie* adheres, and vivid *midare-utsuri* appears conspicuously. The *hamon* is fundamentally *suguha*, mixed with *choji*, *ko-choji*, *ko-gunome*, and small *gunome*; a distinctive tendency toward *saka-ashi* can be observed throughout. In the lower half of the blade, the temper characteristically becomes irregular and lively, with *ashi* and *yo* entering vigorously, *nioi* predominating with *ko-nie*, and fine *kinsuji* and *sunagashi* running through a *nioiguchi* that is bright and clear. The *boshi* typically shows a shallow *notare* with an upward-tending rise, becoming pointed at the tip with a rather long *kaeri*, revealing a distinctive workmanship.
The scholarly significance of Sadatsugu attributions lies in their role as markers of the highest quality within the Aoe tradition. The NBTHK has repeatedly observed that the *jihada*, *hamon*, and *boshi* of these works "conspicuously manifest the distinctive characteristics of the Aoe group in the late Kamakura period," and that the reverse-slanting tendencies visible in the *yakiba* call to mind a precursor to the brilliant *saka-choji midare* that flourished in the subsequent Nanbokucho period. The internal scenery of the temper displays variety; the *nioiguchi* is bright and clear; and, combined with the robust form featuring thick *kasane* and abundant *nikuoki*, these works are consistently recognized as representative superior exemplars of the school.
Sadatsugu (貞次) — Mainline · 1319-1321. Tokujū, Jūyō. Sadatsugu (貞次) of the Bitchu Aoe school is one of the most historically revered names in the Japanese sword tradition. Ko-Aoe Sadatsugu has been transmitted since the *Kanchiin-bon Meizukushi* as a master selected among the smiths appointed to forge in attendance upon Retired Emperor Gotoba. In the *Shinkan Hiden-sho* he is accorded the highest valuation -- "Bitchu workmanship, supreme: fifteen *kan*" -- and thus has long been regarded as a foremost figure even among Aoe works. The name Sadatsugu was carried on through successive generations into the Nanbokucho period; the later Uemon Taro Sadatsugu, recorded as the son of Suketsugu, left dated works from the Karyaku, Gentoku, and Genko eras, though surviving examples by this smith are exceedingly rare.
Works attributed to Sadatsugu display the distinctive hallmarks of the late-Kamakura Aoe school. The forging typically presents *itame-hada* mixed with *mokume*, in which the grain stands out to produce a *chirimen-hada* (crepe-like) texture. Minute *ji-nie* adheres densely, fine *chikei* enter, and *midare-utsuri* rises prominently. The *hamon* takes *suguha* as its foundation, incorporating *ko-choji*, *ko-gunome*, and small *midare*-like elements, with *ashi* and *yo* appearing throughout. The temper is *nioi*-dominant with *ko-nie*, and fine *kinsuji* and *sunagashi* run well, yielding a *nioiguchi* that is bright and clear. In certain works a reverse-running tendency (*gyaku-gakari*) emerges in the lower half, prefiguring the flamboyant *gyaku-choji midare* of the subsequent Nanbokucho period.
Sadatsugu's significance extends beyond his personal accomplishment. From old times there has been a tendency to ascribe to Sadatsugu those unsigned Aoe blades that display a typical manner and are of particularly fine workmanship, making the name a benchmark for quality within the school. The imposing *sugata* seen in signed examples -- wide *mihaba* with little taper, *o-kissaki*, and pronounced *funbari* -- is chronologically noteworthy for anticipating forms more commonly associated with the Nanbokucho era. As both a historical figure of the highest rank and a touchstone for Aoe excellence, Sadatsugu remains indispensable to the study of the Bitchu sword-making tradition.
Suketsugu (助次) — Mainline · 1312-1318. Tokujū, Jūyō. Suketsugu is traditionally said to have been the son of Ko-Aoe Toshitsugu, and the succession of this name extends across a broad span from the early Kamakura period through the Nanbokucho period. According to reference works on signatures, there were at least three generations of smiths using the name, with activity recorded across the eras of Jokyu, Showa, Enbun, Eitoku, and Oei. The smith of the late Kamakura period, active around Showa 1 (1312), is identified as belonging to Naka-Aoe and is the most prominently represented in designated works. His signed pieces bear long inscriptions cut with a thick chisel in large, boldly formed characters, sometimes including the place-name designation "Ko'i Toshosho" and the notation "resident of Senoo," establishing that the Senoo smiths and the Aoe smiths, once thought distinct, had by the Kamakura period merged into a single tradition centered in the lower basin of the Takahashi River.
The technical hallmarks of Suketsugu's work are firmly grounded in the Aoe school's characteristic idiom. The forging presents *itame-hada* mixed with *mokume*, sometimes tending toward *nagare-gokoro*, with the grain standing out; fine *ji-nie* adheres densely, *chikei* appear, and *utsuri* emerges in forms ranging from faint streaks to *jifu-utsuri*. The *hamon* is *suguha*-based with a shallow *notare* tone, mixed with *ko-gunome*, *saka-choji*, and pointed *togari-gunome*; *saka-ashi* and *yo* enter, and *ko-nie* adheres well with *sunagashi* running through. The *boshi* is typically straight, turning back in *ko-maru* or *o-maru*, sometimes with *hakikake*. In certain works the *kasane* is rather thick and the construction bold and powerful, while later-period examples show the *chu-suguha* with reversed-slant *ko-ashi* that clearly exhibits the style of Sue-Aoe.
Works by Suketsugu occupy a position of particular documentary and scholarly importance within the Aoe tradition. The Showa 1 date appearing on multiple pieces represents the earliest known date among extant Aoe-made swords, and the long inscriptions, including the "Gyobu no Jo" title and age inscription on the Bunpo 2 (1318) tanto, constitute invaluable source material for the study of medieval Bitchu swordsmithing. The NBTHK has noted that although individual pieces may show a slight suggestion of *tsukare* in the *ji*, the works overall preserve an archaic and elegant taste while clearly expressing the characteristic features of Aoe workmanship, presenting a representative archetype of Aoe production of this period.
Tsunetsugu (恒次) — Mainline · 1310-1347. Tokujū, Jūyō. Tsunetsugu is one of the representative lineage names of the Aoe school of Bitchu Province, a tradition whose renown was already attested in the early eleventh-century compendium *Shin Sarugaki-ki*, which counted "the swords of Bitchu" among the notable products of the provinces. The earliest and most celebrated bearer of the name is the Ko-Aoe Tsunetsugu traditionally identified as one of Retired Emperor Go-Toba's *goban-kaji* — appointed swordsmiths of the highest standing — and recorded as a son of Ko-Aoe Moritsugu. From this distinguished origin the name was inherited across a long span, from the early Kamakura period through the Nanbokucho era, with multiple generations active in the Aoe heartland along the lower reaches of the Takahashi River. One later bearer, Saemon no Jo Tsunetsugu, is documented as residing at Manjusho in Bitchu and inscribed blades with his official title alongside a Enkyo 3 (1310) date, constituting valuable reference material for the school's chronology.
The technical character of late-Kamakura Tsunetsugu work is firmly established in NBTHK appraisals. The forging (*kitae*) shows compact *ko-itame* mixed with *ko-mokume*, the grain standing finely to produce a *chirimen-hada* — the distinctive crepe-like texture — with *jifu*-like tonal areas intermixed and fine *ji-nie* adhering closely. A hallmark of the school is the appearance of *utsuri* in various modes: reverse-leaning *midare-utsuri* in darker bands, mottled *jifu-utsuri*, and the distinctive *dan-utsuri* in which *sugu-utsuri* stands near the edge while *midare-utsuri* appears toward the *shinogi*. The *hamon* is fundamentally *chu-suguha*, into which *ko-gunome*, *gunome*, and reverse-slanting elements are mixed; *saka-ashi* — the so-called *nezumi-ashi* — enter plentifully alongside *ashi* and *yo*. The *nioiguchi* tends toward *shimarigokoro*, a tightened quality, yet remains bright and clear, with *nioi* predominating and *ko-nie* adhering.
NBTHK assessors consistently characterize Tsunetsugu's oeuvre as manifesting, without reservation, the aesthetic strengths and points of interest characteristic of bright, clear Aoe work. Compared with contemporary Bizen productions, these blades present a quieter, more restrained and astringent character. Appraisals recurrently note ample *nikuoki* — excellent retention of flesh — conferring a substantial and forceful presence, and praise the dense, precise forging and the sound condition of both *ji* and *ha* as hallmarks of robust and stalwart workmanship. In these qualities the Tsunetsugu lineage stands as a pillar of the Aoe tradition at its late-Kamakura zenith.
Yoshitsugu (吉次) — Mainline · 1345-1350. Tokujū. Yoshitsugu was a smith of the Aoe school working in Bitchu Province, a region long renowned as a source of iron. Sword compendia record him as active around the Jowa era (1345--1350) of the Nanbokucho period, placing him within the mature phase of the school's development. The Aoe group is conventionally divided into two periods: works up to around the mid-Kamakura period are distinguished as Ko-Aoe, while those thereafter through the Nanbokucho period are broadly termed Aoe. The NBTHK notes, however, that appraisals assigning specific individual names to Aoe works "are subject to both approval and dissent," underscoring the difficulty of firm personal attribution within this prolific school.
The Aoe style exhibits two principal modes: one consists of *suguha* tempered with a tightly formed *nioiguchi*; the other is the distinctive *saka-choji-midare*, "whose characteristic form was brought to completion by around Enbun, during the high point of Nanbokucho swordmaking." Yoshitsugu's work reflects the first mode. His forging is a densely compacted *ko-itame-hada* with minute *ji-nie* and fine *chikei*. The *hamon* is fundamentally suguha, mixed with *gunome*, angular elements (*kaku-gakari*), and *ko-gunome*, at times showing a reverse tendency with *ko-ashi* and *yo*. The nioiguchi is tight, with *ko-nie*, and "bright and clear." A hallmark of his *jihada* is the vivid *midare-utsuri* that, near the edge, forms double and triple band-like layers known as *dan-utsuri*, accompanied by the dark mottled texture called *sumihada* -- features identified as "major highlights of this school." His blades present a wide *mihaba* with little taper, shallow *sori*, and an imposing *o-kissaki*; the *boshi* tends toward *tsukiage* with a pointed inclination.
Designated examples have been praised as "superlative" and "outstanding" among Aoe works, with the NBTHK further commending their *kenzen* -- sound and well-preserved -- condition. His output exemplifies the commanding, robust *taihai* associated with Aoe at its Nanbokucho-period zenith, and his blades remain touchstones for the school's tradition of tight forging and luminous temper.
Other smiths
Ietsugu (家次) — Mainline · 1356-1357. Ietsugu belonged to the Aoe school of Bitchu Province, a lineage whose activity spanned from the mid-Kamakura period through the late Nanbokucho era. He is recorded in the *Meikan* as a son of Moritsugu, and his works are appraised across two distinct periods: a tachi bearing a *tachi*-style signature is attributed to the Naka-Aoe group of the middle to late Kamakura period, while dated works inscribed Enbun 2 (1357) and Shitoku 3 (1386) place him firmly in the Nanbokucho era. This range suggests either a long working life or, more likely, successive generations operating under the same name.
The Naka-Aoe tachi displays the school's hallmark qualities: a dense *ko-itame-hada* with *ji-nie* and *utsuri* standing out, paired with a *suguha-cho* temper where the *nioiguchi* tends toward tightness with abundant *ko-ashi* and adhering *ko-nie*. The NBTHK notes that "the characteristic features of this lineage are well expressed in both the *jihada* and the *hamon*." The later tachi dated Shitoku 3 is especially significant, as signed works of the Aoe school from this period are described as "extremely rare — not only those by Ietsugu, but in general." Despite workmanship the NBTHK candidly assesses as not rising to a high level, the piece is valued as "exceedingly precious as documentary material."
What emerges from the designated corpus is an artisan of considerable documentary importance to the study of the Aoe tradition. His tanto dated Enbun 2 differs in form from the large, elongated examples of contemporaries such as Tsuguyoshi and Tsugunao, making it "useful for research on the Aoe school." Across his surviving works, Ietsugu preserves the essential vocabulary of Bitchu craftsmanship while documenting the school's evolution through its final active centuries.
Moritsugu (盛次) — Mainline · 1332-1334. Smith of the Bitchū Aoe School.
Sanenaga (眞長) — Mainline · 1308-1311. Smith of the Bitchū Aoe School.
Naganao (長直) — Mainline · 1288-1293. Smith of the Bitchū Aoe School.
Sanetsune (眞恒) — Mainline · 1303-1306. Smith of the Bitchū Aoe School.
Suetsugu (末次) — Mainline · 1288-1293. Smith of the Bitchū Aoe School.
Chikatsugu (親次) — Mainline · 1303-1306. Smith of the Bitchū Aoe School.
Chikatsugu (親次) — Mainline · 1331-1336. Smith of the Bitchū Aoe School.
Harutsugu (春次) — Mainline · 1352-1356. Smith of the Bitchū Aoe School.
Hisatsugu (久次) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Masatsugu (正次) — Mainline · 1338-1342. Smith of the Bitchū Aoe School.
Naganao (永直) — Mainline · 1293-1299. Smith of the Bitchū Aoe School.
Nagatsugu (長次) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Nagatsugu (長次) — Mainline · 1352-1356. Smith of the Bitchū Aoe School.
Nobutsugu (延次) — Mainline · 1331-1336. Smith of the Bitchū Aoe School.
Norimitsu (則光) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Suetsugu (末次) — Mainline · 1338-1342. Smith of the Bitchū Aoe School.
Suetsugu (末次) — Mainline · 1362-1368. Smith of the Bitchū Aoe School.
Suketsugu (助次) — Mainline · 1293-1299. Smith of the Bitchū Aoe School.
Sukeyoshi (助吉) — Mainline · 1338-1342. Smith of the Bitchū Aoe School.
Toshitsugu (俊次) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Tsuguhisa (次久) — Mainline · 1342-1345. Smith of the Bitchū Aoe School.
Tsuguyori (次頼) — Mainline · 1306-1308. Smith of the Bitchū Aoe School.
Tsuguyoshi (次吉) — Mainline · 1306-1308. Smith of the Bitchū Aoe School.
Tsunetsugu (恒次) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Yoritsugu (頼次) — Mainline · 1317-1319. Smith of the Bitchū Aoe School.
Yukizane (行眞) — Mainline · 1317-1319. Smith of the Bitchū Aoe School.
Arihiro (有弘) — Mainline · 1352-1356. Smith of the Bitchū Aoe School.
Arihiro (在弘) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Arinobu (有信) — Mainline · 1288-1293. Smith of the Bitchū Aoe School.
Arisue (有末) — Mainline · 1299-1302. Smith of the Bitchū Aoe School.
Aritsugu (有次) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Ariyuki (有行) — Mainline · 1345-1350. Smith of the Bitchū Aoe School.
Ariyuki (有行) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Chikanori (親則) — Mainline · 1324-1326. Smith of the Bitchū Aoe School.
Chikatsugu (近次) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Chikatsugu (近次) — Mainline · 1308-1311. Smith of the Bitchū Aoe School.
Chikayori (親依) — Mainline · 1361-1362. Smith of the Bitchū Aoe School.
Chikayori (近依) — Mainline · 1317-1319. Smith of the Bitchū Aoe School.
Haruhisa (春久) — Mainline · 1346-1370. Smith of the Bitchū Aoe School.
Harutsugu (玄次) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Harutsugu (春次) — Mainline · 1308-1311. Smith of the Bitchū Aoe School.
Hidetoshi (秀利) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Hisatsugu (久次) — Mainline · 1329-1331. Smith of the Bitchū Aoe School.
Hisatsugu (久次) — Mainline · 1317-1319. Smith of the Bitchū Aoe School.
Hisayoshi (久吉) — Mainline · 1303-1306. Smith of the Bitchū Aoe School.
Kagenaga (景長) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Kageshige (晩重) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Kageyoshi (景良) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Kanenaga (包永) — Mainline · 1321-1324. Smith of the Bitchū Aoe School.
Kanenaga (包永) — Mainline · 1342-1345. Smith of the Bitchū Aoe School.
Kanenobu (兼宣) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Kanetsugu (金次) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Kanetsugu (包次) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Kiyotsugu (清次) — Mainline · 1260-1261. Smith of the Bitchū Aoe School.
Koreshige (是重) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Koreshige (是重) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Kunimune (國宗) — Mainline · 1329-1331. Smith of the Bitchū Aoe School.
Mareto (希遠) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Masatsune (正恒) — Mainline · 1311-1312. Smith of the Bitchū Aoe School.
Masatsune (正恒) — Mainline · 1361-1362. Smith of the Bitchū Aoe School.
Moritsugu (守次) — Mainline · 1308-1311. Smith of the Bitchū Aoe School.
Moritsugu (守次) — Mainline · 1345-1350. Smith of the Bitchū Aoe School.
Moritsune (守恒) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Morotsugu (師次) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Morotsugu (師次) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Munesada (宗貞) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Munesue (宗末) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Munetsugu (宗次) — Mainline · 1324-1326. Smith of the Bitchū Aoe School.
Munetsugu (宗次) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Munetsune (宗恒) — Mainline · 1293-1299. Smith of the Bitchū Aoe School.
Nagahisa (長久) — Mainline · 1352-1356. Smith of the Bitchū Aoe School.
Nagamitsu (永光) — Mainline · 1345-1350. Smith of the Bitchū Aoe School.
Nagatsugu (長次) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Nagatsugu (永次) — Mainline · 1324-1326. Smith of the Bitchū Aoe School.
Naonaga (直長) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Naonobu (直信) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Naonobu (直信) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Nariie (成家) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Nariie (成家) — Mainline · 1331-1336. Smith of the Bitchū Aoe School.
Naritaka (業高) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Naritsuna (成綱) — Mainline · 1319-1321. Smith of the Bitchū Aoe School.
Nobukuni (信國) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Nobusada (延貞) — Mainline · 1345-1350. Smith of the Bitchū Aoe School.
Nobutsugu (信次) — Mainline · 1321-1324. Smith of the Bitchū Aoe School.
Nobutsugu (信次) — Mainline · 1293-1299. Smith of the Bitchū Aoe School.
Nobutsugu (信次) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Sadatsugu (貞次) — Mainline · 1326-1329. Ko-Aoe Sadatsugu (青江貞次) has been transmitted since the *Kanchiin-bon Meizukushi* as a celebrated master said to have been selected among the smiths in attendance upon Retired Emperor Go-Toba. The *Shinkan Hiden-sho* accords him the very highest valuation -- "Bicchu objects, supreme: fifteen *kan*" -- and thus from antiquity he has been regarded as first rank even among Aoe works. The same name continued to be carried on down into the Nanbokucho period; perhaps for this reason, from old times the Hon'ami family shows a tendency, in the case of unsigned Aoe works, to render Sadatsugu appraisals for pieces that display a typical manner and are of particularly fine workmanship.
The works attributed to Sadatsugu exhibit a forging of *itame-hada* mixed with *mokume*, in which the grain stands out finely; *ji-nie* adheres in extremely fine particles, and vivid *midare-utsuri* is clearly visible. The *hamon* is fundamentally *suguha*, mixed with *choji*, *ko-choji*, and *ko-gunome*; in the lower half the temper becomes especially irregular and lively, with *ashi* and *yo* entering vigorously. *Nioi* predominates with *ko-nie*; fine *kinsuji* and *sunagashi* run through; and the *nioiguchi* is bright and clear. In certain examples, a tightly forged *ko-itame* with *dan-utsuri* appears, and the suguha shows a tight nioiguchi mixing *saka-ashi*. The *boshi* characteristically shows a shallow *notare* that tends to rise upward and become pointed, with a rather long *kaeri* -- features that together reveal the workmanship style. A reverse-slanting tendency observed in the *yakiba*, and the increasingly lively irregularity in the lower half, call to mind a precursor to the brilliant *saka-choji midare* of the subsequent Nanbokucho period.
The blades attributed to Sadatsugu conspicuously manifest the distinctive characteristics of the Aoe group in the late Kamakura period. They typically retain thick *kasane* with abundant *hiraniku* and robust form, even when greatly shortened. The internal scenery of the temper displays variety; the nioiguchi is bright and clear; and the jihada, hamon, and boshi described above collectively represent "a superior exemplar of that school" -- the standard by which the Hon'ami Sadatsugu attribution has been conferred for generations.
Sadatsugu (貞次) — Mainline · 1293-1299. Smith of the Bitchū Aoe School.
Sadatsugu (貞次) — Mainline · 1345-1350. Smith of the Bitchū Aoe School.
Saia (西阿) — Mainline · 1288-1333. Smith of the Bitchū Aoe School.
Sanesada (眞貞) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Shigetsugu (重次) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Shigetsugu (重次) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Sueyoshi (末吉) — Mainline · 1352-1356. Smith of the Bitchū Aoe School.
Sukechika (助近) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Sukechika (助近) — Mainline · 1332-1334. Smith of the Bitchū Aoe School.
Sukenobu (助延) — Mainline · 1362-1368. Smith of the Bitchū Aoe School.
Suketane (助植) — Mainline · 1317-1319. Smith of the Bitchū Aoe School.
Tadatsugu (忠次) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Tadatsugu (忠次) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Tamenaga (爲長) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Tameto (爲遠) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Tameuji (爲氏) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Tameyasu (爲康) — Mainline · 1288-1293. Smith of the Bitchū Aoe School.
Tameyoshi (爲吉) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Tokitsugu (時次) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Tokitsugu (時次) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Tokizane (時眞) — Mainline · 1303-1306. Smith of the Bitchū Aoe School.
Tokizane (時眞) — Mainline · 1362-1368. Smith of the Bitchū Aoe School.
Tomotsugu (友次) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Tomotsugu (友次) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Tomotsugu (朝次) — Mainline · 1338-1342. Smith of the Bitchū Aoe School.
Toshitsugu (利次) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Toshitsugu (利次) — Mainline · 1362-1368. Smith of the Bitchū Aoe School.
Toshitsugu (年次) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Toshitsugu (俊次) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Totsugu (遠次) — Mainline · 1288-1293. Smith of the Bitchū Aoe School.
Tsuguhide (次秀) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Tsuguhide (次秀) — Mainline · 1299-1302. Smith of the Bitchū Aoe School.
Tsuguhide (次秀) — Mainline · 1362-1368. Smith of the Bitchū Aoe School.
Tsuguhiro (次弘) — Mainline · 1308-1311. Smith of the Bitchū Aoe School.
Tsuguhiro (次弘) — Mainline · 1342-1345. Smith of the Bitchū Aoe School.
Tsuguhiro (次廣) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Tsugumasa (次正) — Mainline · 1362-1368. Smith of the Bitchū Aoe School.
Tsugunao (次直) — Mainline · 1293-1299. Smith of the Bitchū Aoe School.
Tsugusada (次定) — Mainline · 1317-1319. Smith of the Bitchū Aoe School.
Tsugusue (次末) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Tsugusuke (次助) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Tsugutane (次植) — Mainline · 1288-1293. Smith of the Bitchū Aoe School.
Tsugutane (次植) — Mainline · 1326-1329. Smith of the Bitchū Aoe School.
Tsugutoshi (次利) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Tsugutsune (次恒) — Mainline · 1324-1326. Smith of the Bitchū Aoe School.
Tsugutsune (次恒) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Tsuguyori (次依) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Tsuguyuki (次行) — Mainline · 1326-1329. Smith of the Bitchū Aoe School.
Tsune (恒) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Tsuneie (恒家) — Mainline · 1331-1336. Smith of the Bitchū Aoe School.
Tsunenaga (恒永) — Mainline · 1317-1319. Smith of the Bitchū Aoe School.
Tsunenori (恒則) — Mainline · 1293-1299. Smith of the Bitchū Aoe School.
Tsunesue (恒末) — Mainline · 1331-1336. Smith of the Bitchū Aoe School.
Tsunetsugu (恒次) — Mainline · 1350-1352. Smith of the Bitchū Aoe School.
Tsunetsugu (恒次) — Mainline · 1312-1317. Tsunetsugu of the Bitchu Aoe group stands among the most enduring names in the school's history. The most celebrated bearer of this name is the Ko-Aoe Tsunetsugu, famed as one of the *goban kaji* appointed by Emperor Go-Toba, and the name was inherited continuously from the early Kamakura period into the Nanbokucho era. Within the Aoe lineage, smiths descending from Masatsune as progenitor signed in *tachi-mei* fashion, while the line of Sadaji and related smiths characteristically cut their signatures on the *hakiura*. The later Aoe smiths bearing the title "Saemon no Jo" represent a distinct branch, as evidenced by extant works with Gen'toku-era dates.
The Juyo setsumei describe a forging style grounded in tightly packed *ko-itame-hada*, with *mokume* and *sumi-hada* mixed in, and fine *ji-nie* adhering closely. *Utsuri* appears in varied forms: *nie-utsuri*, *midare-fu* patterning toward the *mune*, and the distinctive *dan-utsuri* -- a linear form standing out toward the edge that is a recognized hallmark of late Kamakura Aoe work. The *hamon* is typically *suguha*-based with *ko-gunome* or *ko-midare* mixed in; the *nioiguchi* tends toward *shimarigokoro*, tight yet bright and clear, with fine *nie-suji* and *sunagashi* appearing. One work (Juyo 46) is praised as possessing ample *nikuoki* with a *nioiguchi* that is "bright and clear, with finely active *ashi* and *yo*," and is singled out as "a superior example among works appraised as Tsunetsugu." File marks are characteristically *o-sujikai*, and the signature placement toward the *mune* side conforms to the conventions of the later Aoe group.
With works spanning from the mid-Kamakura through late Kamakura period, the Tsunetsugu name encompasses several generations of accomplished Aoe smiths whose tight, *nie*-laden forging and restrained *suguha* tempering represent the Bitchu tradition at its most refined.
Tsuneyasu (恒康) — Mainline · 1319-1321. Smith of the Bitchū Aoe School.
Tsunezane (恒眞) — Mainline · 1293-1299. Smith of the Bitchū Aoe School.
Tsunezane (恒眞) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Yasuhiro (安弘) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Yasuhiro (安弘) — Mainline · 1317-1319. Smith of the Bitchū Aoe School.
Yasuhiro (安弘) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Yasuie (安家) — Mainline · 1352-1356. Smith of the Bitchū Aoe School.
Yasuie (安家) — Mainline · 1293-1299. Smith of the Bitchū Aoe School.
Yasutsugu (康次) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Yasutsugu (安次) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Yasutsugu (康次) — Mainline · 1299-1302. Smith of the Bitchū Aoe School.
Yoritsugu (依次) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Yoritsugu (依次) — Mainline · 1311-1312. Smith of the Bitchū Aoe School.
Yoshifusa (吉房) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Yukinobu (行信) — Mainline · 1362-1368. Smith of the Bitchū Aoe School.
Yukinobu (行信) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Yukitoshi (行利) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Yukitsugu (行次) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Yukitsugu (行次) — Mainline · 1303-1306. Smith of the Bitchū Aoe School.
Yukitsugu (幸次) — Mainline · 1311-1312. Smith of the Bitchū Aoe School.
Yukiyasu (行安) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Yukiyasu (行安) — Mainline · 1345-1350. Smith of the Bitchū Aoe School.
Yukizane (行眞) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Yukizane (行眞) — Mainline · 1362-1368. Smith of the Bitchū Aoe School.
Phase 3 · Sue-Aoe (末青江) · 1334 – 1500
Sue-Aoe names the closing chapter of the Bitchū tradition, the work made after the Aoe smiths reached the height of their powers in the Nanbokuchō era and then carried the lineage forward into Muromachi decline. The window is anchored by the hands the NBTHK repeatedly groups together as the representative smiths of the period: Tsuguyoshi (次吉), Tsugunao or Tsuginao (次直), and Moritsugu (守次), with Naotsugu (直次), Yoshitsugu (吉次), and a Sadatsugu (貞次) name carried down from the late Kamakura masters into this later age. Dated blades fix the chronology firmly, from a Moritsugu tantō of Enbun 3 (1358) and a Naotsugu in the Ryakuō years through Tsuguyoshi pieces of Teiji 2 (1363) and Kōan 2 (1362). These men succeeded the late-Kamakura-into-early-Nanbokuchō generation that produced Sadatsugu and the earlier Moritsugu, and they worked at the moment the Southern Court's fortunes were turning, after which the school thinned out. The very tail of the line surfaces in obscure later Bitchū hands such as Munesada and Sōtei of Kasaoka, dated Bunmei 13 (1481), whose lineage the records leave unknown and whose work the setsumei describe as nearly indistinguishable from late Bizen.
Sugata is the first tell. Setsumei after setsumei records a wide *mihaba* with little taper from base to tip, thin *kasane*, *sun-nobi* proportion in the tantō and an extended *chū-kissaki* or outright *ō-kissaki* in the larger blades, the broad Nanbokuchō build that the earlier Aoe never carried. The *jihada* keeps the school signature of *ko-itame* mixed with *mokume*, finely standing, with mottled *jifu* and patches of *sumihada* drifting through the steel. Above all the period is read in its *utsuri*: streak-like *suji-utsuri* rises near the edge and stacks into the layered *dan-utsuri* the catalogues prize, seen plainly on the Tsugiyoshi tachi of Tokuju 21 and the dated Tsuguyoshi tantō of Juyo 58. Two tempers divide the leading hands. Tsuguyoshi favors a tight, bright *suguha* with *ko-ashi* and *saka-ashi*; Tsugunao favors the flamboyant *saka-chōji-midare* with its reverse slant, *ashi* and *yō* pouring in, that matured around Enbun. Against this the Ko-Aoe of the mid-Kamakura ran *ko-nie-deki* with a subdued, *shizumi* *nioiguchi* over a refined *chirimen-hada*, while the late-Kamakura Chū-Aoe of Sadatsugu and Moritsugu stood between, the *nie* growing calmer and the reverse-slanting *yakiba* only beginning to foreshadow the later drama. Crucially the period remained *nioi-deki* where other provinces took up Sōshū *nie*, a holding distinction the setsumei mark out by name.
For kantei the cluster reads together. A broad Nanbokuchō sugata, *dan-utsuri* over *sumihada*, *ō-sujikai* file marks on the tang, and a *nioiguchi* that is tight and clear point to this window rather than to Bizen of the same age; the choice between bright *suguha* and reverse *saka-chōji* then separates Tsuguyoshi from Tsugunao, while Naotsugu's forceful reverse-chisel *mei* and *nezumi-ashi*, and Moritsugu's *kinsuji* in a tight *suguha*, mark their own hands. The named masters carry strong provenance: a Tsugiyoshi wakizashi dated Enbun 2 descended in the Maeda family, a Yoshitsugu tantō passed to the Sakai of Himeji by gift of Tokugawa Ietsuna, and an *ō-suriage* *den* Tsuguyoshi katana ran through the Yanagisawa house with Hon'ami origami from Mitsuatsu. Honma's own remark singling out Tsugiyoshi and Tsuginao as the makers of the clearest *chōji* in tantō fixes their standing at the close of the Aoe story.
Tsuguyoshi (次吉) — Mainline · 1357-1368. Jūbi, Tokujū, Jūyō. The early eleventh-century travel-text *Shin Sarugakki*, listing the famous products of the provinces, already names "the swords of Bitchū," and it was the Aoe smiths, flourishing along the lower reaches of the Takahashi River, who inherited that reputation. Tsuguyoshi works at the Nanbokuchō height of the line, and the published sources count him, together with Tsugunao and Moritsugu, among the representative Aoe smiths of the mid-fourteenth century. His dated, signed blades run across the Enbun, Jōji and Kōan years of the 1350s and 1360s, almost all of them *tantō* and *sun-nobi* wakizashi: wide in body, thin in *kasane*, shallow in *sori*, the period shape stated without ornament. Several are still *ubu*, carrying a long signature on the *omote* and a date on the reverse, so his hand can be followed year by year.
His manner is the one the published sources draw most carefully, because it divides cleanly in two. He works in a tight, bright *suguha* and in a flamboyant *saka-chōji-midare*, and the judges return again and again to the same distinction between the two Aoe masters: "as a rule Tsuguyoshi runs to *suguha*, Tsugunao to *saka-chōji-midare*,[[c:1]]" while in either temper the *nioiguchi* is tight and clear. The *suguha* is by far his own register. On these blades he tempers a *chū-suguha* or a narrow *hoso-suguha*, in places a shallow *notare*, into which small *ko-ashi*, *yō* and a reversed *saka-ashi* tendency enter, the temper *nioi*-dominant with *ko-nie*, fine *kinsuji* running within, the *nioiguchi* tight and notably bright. It is this clarity that the published sources name his and the school's chief point of appreciation, the *nioiguchi* that "is tight, and bright and clear.[[c:2]]"
The *jigane* carries the rest of the Aoe signature. Over a well-packed *ko-itame*, at times mixed with *ko-mokume* and standing a little, lie fine *ji-nie* set in minute density and delicate *chikei*, with the speckled *ji-madara* the sources also call *chirimen-hada* and patches of clear *sumihada*. A *midare-utsuri* stands toward the *mune*, and on his finest blades a further linear *utsuri* runs along the edge so that the two layer into a banded *dan-utsuri*, the steel left clear. The *bōshi* runs straight to a *ko-maru*, frequently with a pointed turn, sometimes with a long *kaeri* or a little *hakikake*; and the tang is filed, by the school's rule, in *ō-sujikai*. On one Kōan *tantō* the judges single out a *kaeri* "boldly tempered down deep to the *machi*,[[c:3]]" an unusual flourish in a *suguha* work that they hold sharpens rather than coarsens the blade.
The second register is the rarer face. On a small number of pieces the temper opens into a showy *saka-chōji-midare* mixed with *gunome*, the *ashi* reversed and *yō* entering, *nioi*-dominant with *ko-nie* and fine *kinsuji*, the *bōshi* entering as *midare* and turning with a pointed flavor; the *midare-utsuri* on the same blades stands conspicuously. The judges call one such *wakizashi* a representative work whose *saka-chōji* and *utsuri* together show the school plainly, and on a dated *tantō* of this kind they record an oral remark of Honma's that, within this Nanbokuchō line, "the smith who tempers the clove pattern in a *tantō* with the clearest *nioiguchi* is this craftsman, or else Tsugunao.[[c:4]]" Beyond the signed work stands a third record, the *ō-suriage mumei* katana attributed to him, a wide blade of imposing shape that keeps a 1657 Hon'ami origami naming Tsuguyoshi; its *itame* *jigane* with emerging *jifu* and its *nioi*-deki *suguha* with *saka-ashi* let the judges affirm it as his from the *jihada* and *hamon* rather than from any personal tell.
What sets Tsuguyoshi apart within his own school is exactly this balance. Against Tsugunao, whose hand leans to the brilliant reverse clove pattern, his work is read as the *suguha* master of the pair, the *nioiguchi* tight and bright on both their hands but the quiet temper his by preference. Against the earlier Ko-Aoe, whose *suguha* the published sources describe as *ko-nie-deki* with a somewhat subdued *nioiguchi*, his is the Nanbokuchō clarity, the line tightened and brightened. The judges call the *suguha* his family specialty, the manner in which "he displays his true capabilities," and name his best blades the outstanding examples among his surviving work.
For the collector he is a Nanbokuchō name of real standing rather than a rarity beyond reach. Fujishiro grades him Jō-jō saku. He has no National Treasures and no Important Cultural Properties; his record runs instead through the modern designations, fourteen of his blades falling in the Tokubetsu Jūyō and Jūyō tiers, two of them at Tokubetsu Jūyō. The published sources prize his *ubu*, dated, signed pieces as reference material for the study of the smith, and name one Tokubetsu Jūyō wakizashi outstanding among his works. His provenance runs through the daimyō houses: a Tokubetsu Jūyō wakizashi transmitted in the Maeda family with a black-lacquer *aikuchi koshirae* bearing eight gold *umebachi* crests, a *tantō* held in the Kan'in-no-miya princely house with its Hon'ami origami and crested storage box, and further blades recorded with the Maeda and Arima families. A signed Tsuguyoshi is not often offered, and most designated examples are held rather than traded, but a Jūyō tantō or wakizashi of his does appear from time to time, and a dated, signed one is among the more knowable things a collector of Bitchū Aoe could hope to encounter.
Munesada (宗貞) — Mainline · 1469-1487. Smith of the Bitchū Aoe School.
Hiratada (平忠) — Mainline · 1352-1368. Jūbun. Smith of the Bitchū Aoe School.
Ietsugu (家次) — Mainline · 1367-1386. Jūbun, Jūyō. Smith of the Bitchū Aoe School.
Nagatsugu (長次) — Mainline · 1394-1428. Jūyō. Smith of the Bitchū Aoe School.
Sadatsugu (貞次) — Mainline · 1380-1394. Jūyō. Smith of the Bitchū Aoe School.
Other smiths
Kagetsugu (景次) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Kunitsugu (国次) — Mainline · 1394-1466. Smith of the Bitchū Aoe School.
Yoshitsugu (吉次) — Mainline · 1380-1428. Smith of the Bitchū Aoe School.
Arihiro (有弘) — Mainline · 1381-1384. Smith of the Bitchū Aoe School.
Arisue (有末) — Mainline · 1489-1492. Smith of the Bitchū Aoe School.
Ariyuki (有行) — Mainline · 1384-1387. Smith of the Bitchū Aoe School.
Hisatsugu (久次) — Mainline · 1381-1384. Smith of the Bitchū Aoe School.
Kagenaga (景長) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Kageshige (晩重) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Kageshige (景重) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Kagetsugu (景次) — Mainline · 1379-1381. Smith of the Bitchū Aoe School.
Koreshige (是重) — Mainline · 1460-1466. Smith of the Bitchū Aoe School.
Moritsugu (盛次) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Munesada (宗貞) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Munetsugu (宗次) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Naosada (直貞) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Naotsugu (直次) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Nobusada (延貞) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Nobusada (延貞) — Mainline · 1375-1379. Smith of the Bitchū Aoe School.
Noritaka (則高) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Sanesada (眞貞) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Sukenari (助成) — Mainline · 1460-1466. Smith of the Bitchū Aoe School.
Takasue (高末) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tamekiyo (爲清) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Tametsune (爲恒) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Toshitsugu (年次) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Tsuguchika (次近) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tsuguie (次家) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Tsugunari (次成) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tsugusada (次貞) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Tsugutoshi (次利) — Mainline · 1379-1381. Smith of the Bitchū Aoe School.
Tsunekiyo (恒清) — Mainline · 1381-1384. Smith of the Bitchū Aoe School.
Tsunetsugu (常次) — Mainline · 1428-1429. Smith of the Bitchū Aoe School.
Tsunetsugu (恒次) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Yoshimura (吉村) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Yoshitsugu (吉次) — Mainline · 1441-1444. Smith of the Bitchū Aoe School.
Yukiyasu (行安) — Mainline · 1429-1441. Smith of the Bitchū Aoe School.
Live·Aoe lineage
青江
The Bitchū Aoe School
On the Bitchū coast, apart from neighbouring Bizen, the Aoe smiths forged a tradition of their own — known for a distinctive dark sumihada jigane and slender, elegant tachi. Across three phases the line ran from the founding Ko-Aoe masters through the peak of Chū-Aoe and into the long Sue-Aoe twilight.
The The Bitchū Aoe School (青江), active 1100–1500 in Bitchū Province across 413 documented smiths: 5 Kokuhō (National Treasures), 38 Jūbun, 43 Jūbi, 55 Tokubetsu Jūyō, 223 Jūyō.
Phase 1 · Ko-Aoe (古青江) · 1100 – 1235
The Ko-Aoe school flourished in the lower basin of the Takahashi River in Bitchu Province, forging swords at the districts of Koi and Manju in a region long renowned as a source of iron. The school is traditionally held to have begun with Yasutsugu around the Joan era (1171-1175), and works produced from the end of the Heian period through approximately the mid-Kamakura period are distinguished as Ko-Aoe, with production continuing under the broader Aoe designation through the late Nanbokucho era. The representative smiths of this early lineage -- Yasutsugu, Moritsugu, Sadatsugu, Tsunetsugu, Kanetsugu, Toshitsugu, Suketsugu, Tametsugu, Shigetsugu, and Tsugutada among them -- share the character "tsugu" as a common element in their names, forming an unusually cohesive dynastic identity. A distinct sub-lineage, the Senoo group, stood apart from this main line: led by Masatsune and Yukizane, the Senoo smiths forged to the east toward Bizen and rarely incorporated the "tsugu" character. Sadatsugu was counted among the *goban-kaji* serving Retired Emperor Go-Toba, and the *Shinkan Hiden-sho* assigns the name the highest valuation among Aoe works: "Bitchu workmanship, the finest, fifteen kan."
The Ko-Aoe technical vocabulary is remarkably consistent across its many smiths. The *kitae* is built on *itame-hada* intermixed with *mokume*, the grain standing conspicuously to produce *chirimen-hada* -- the tightly compressed, crepe-like surface texture that is the school's most recognizable trait. Patches of *jifu* and *ji-madara* mottle the ground steel, while fine *ji-nie* adheres thickly with *chikei* interwoven; a dark-toned *sumi-hada* may appear amid the standing grain. *Utsuri* manifests in several forms across the school's corpus: *midare-utsuri*, *jifu-utsuri*, and in certain works by Tsunetsugu, tiered bands suggestive of *dan-utsuri*. The *hamon* is predominantly *suguha*-based, mixed with *ko-midare*, *ko-choji*, and *ko-gunome*; *ko-nie* adheres well, and fine *kinsuji* and *sunagashi* run through the hardened edge, while the *nioiguchi* characteristically tends toward *shizumi* -- a subdued, sinking quality -- or in certain smiths appears bright and clear. The *boshi* typically turns in *ko-maru*, sometimes with *hakikake*. Tang conventions provide critical diagnostic markers distinguishing Ko-Aoe from contemporary Ko-Bizen: bold *o-sujikai* file marks, deeply cut *machi*, and signatures placed on the *haki-ura* side in characteristically thick chisel work. The NBTHK consistently observes that compared with Bizen works of the same era, Ko-Aoe productions "convey a somewhat quieter and more subdued taste" -- the restrained, astringent *shibui* character that defines the school's aesthetic.
Yet within this disciplined restraint, individual members demonstrated striking range. Yasutsugu's most celebrated tachi -- transmitted as an heirloom of the Shimazu family and counted among the legendary *Tenka Goken* -- displays a flamboyant *midare-ba* of extraordinary vitality that rivals anything produced in the Bizen tradition, while Sadatsugu's finest works invite comparison with National Treasure-class examples. The later Osumi no Gon no Suke Sadatsugu developed a bold personal manner, broadening the *yakihaba*, concentrating nie to produce *shima-ba*-like scenery, and tempering the boshi with deep *kaeri* -- features that overflow with vigor. Kanetsugu is praised for almost no unevenness of workmanship across his corpus, while Moritoshi's forging is singled out as tighter and better refined than is typical even within this exacting school. The Senoo branch, represented by Masatsune and Yukizane, carried a flavor somewhat resembling Bizen work while maintaining the characteristic chirimen-hada and o-sujikai file marks that identify the hand as unmistakably Bitchu. Across its full productive span, the Ko-Aoe school stands as one of the foundational pillars of the Japanese sword tradition: a lineage whose refined *suguha* aesthetic, distinguished crepe-textured forging, and quietly astringent taste secured Bitchu swords their ancient reputation and continue to command the deepest respect in the study of classical swordsmithing.
Masatsune (正恒) — Mainline · 1213-1219. Kokuhō, Jūbi, Tokujū, Jūyō. Masatsune is a Ko-Aoe smith of Bicchū Province, working from the end of the Heian period into the early Kamakura, and the published sources name him the foremost figure of the Senoo smiths. They divide the old swordsmiths of Bicchū into two lineages, the Senoo smiths and the Aoe smiths, and place Masatsune at the head of the first. He descends from Noritaka and forged at Senoo, in a line the commentary holds apart from the main Aoe stream: he "formed a lineage separate from the main Ko-Aoe line, which frequently used the character Tsugu" (「次」の字を多く用いる古青江の主流派とは別に一派をなした). The *Meikan* enters the first-generation Ko-Aoe Masatsune in the Ken'ei era, yet extant blades descend no later than the close of the Heian period, so close in date to the Ko-Bizen Masatsune of the neighbouring province that the two are easily confused. A Tokubetsu Jūyō tachi states the point plainly, that this Masatsune belongs to a line distinct from the Ko-Aoe smiths who sign with Tsugu and that his workmanship differs from theirs.
His recognized hand is the quiet one. Over a slender tachi of high *koshizori* and pronounced *funbari* he tempers not the showy clove-flower expected of the mainstream Aoe but a calm *chū-suguha* or narrow *suguha*, into which *ko-midare* and small *ko-chōji* are mixed, with *ashi* and *yō* entering well and the *nioiguchi* drawn tight in *ko-nie*. The *bōshi* runs straight and turns back in a small *ko-maru*. This restraint is the whole character of the smith. The published sources read his work against the Ko-Bizen Masatsune it resembles and find his "somewhat plainer, with an astringent, subdued taste" (やや地味で渋さが感じられる). Where the school's later hands open into flamboyance, his stays close to the line, the activity carried in *ashi*, *yō*, and fine *sunagashi* and *kinsuji* rather than in towering heads of *chōji*.
The *jigane* is the other half of the recognition. He forges a *ko-itame* that stands a little and tends toward *masame*, with *ji-nie* and fine *chikei*, and through it run the speckled patches the published sources call *chirimen-hada*, the crepe-like Aoe *jigane*, often with areas of clear *sumihada* and a *jifu*-style or quiet irregular *utsuri*. It is this *jigane*, more than the temper, that separates him from his Bizen namesake, whose steel carries no such crepe of *jifu*. On one Jūyō tachi the commentary singles the *chirimen-hada* out as distinctive and the *bōshi* as splendid, and on another the grain rises in a fine, *chirichiri* manner, mixing clear steel into a crepe-like surface in the most characteristic Ko-Aoe way. The *ō-sujikai* file marks on his tangs are named, with the placement of his signature and the narrow *suguha*, among the notable points of his work, and they carry the attribution even where the *mei* has worn down to a single legible character.
His record divides cleanly in two. There are the signed tachi, several still *ubu* with the two-character *mei* near the tip of the tang, others shortened yet keeping the high curvature and *funbari* of an old blade, and there are the *ō-suriage mumei* katana attributed to him, originally slender tachi, judged by the same *chirimen* *jigane*, quiet *suguha* and *ko-maru* turnback. On one *mumei* katana the published sources name precisely the straight *bōshi* turning to *ko-maru* as the feature that marks Masatsune. The dating, though, the commentary leaves open: because several smiths within the line itself used the name and their signing manner differs blade to blade, and because extant works run earlier than the *Meikan*'s Ken'ei date, one signed tachi was designated as a blade merely "bearing a signature," the question deferred to future study.
What sets him apart, the judges name in his own terms. He is held back from the Ko-Bizen Masatsune by the crepe of his *jifu* and the clear *sumihada* of his *jigane*, and from the later, flamboyant Aoe by the deliberate calm of his *suguha*. The published sources call his work "archaic and deeply flavored" (古雅で味わい深い), preserving the refined elegance of the transitional late-Fujiwara to early-Kamakura form, and on one *ubu* signed tachi judge it "the most archaic in character among works of this name" (同名中でも就中、古調である). Beside Koreshige, Yasuiye, Hirotsune, Tsunemasa, Moritsune and Yukimasa of the same Senoo line, he stands as its representative, the one whose surviving works are not few and whose hand is the most clearly read.
For the collector he is a rare and quiet early name. His presence runs through the prewar Jūyō Bijutsuhin and the modern Jūyō and Tokubetsu Jūyō tiers, twenty blades in the two highest tiers and four of them Tokubetsu Jūyō, one a tachi that carries an early-Meiji *handachi* mounting fitted by Fuchikawa Kazunori. Fujishiro records no grade for him, and his blades survive in small number, several signed in original tang, which the published sources call "especially valuable for remaining *ubu* and signed" (生ぶ茎、有銘であることは特に貴重である), and one of which they name "one representative work of Ko-Aoe Masatsune" (古青江正恒の代表作の一本). His provenance reaches the imperial house: one *kodachi* was formerly held by the Arisugawa-no-miya princely family, and his other blades are preserved in long-held private hands and institutional collections of recorded whereabouts. Most are held rather than traded, and a signed Ko-Aoe Masatsune in original tang comes to light only seldom, so a privately held example is a notable thing for a collector to encounter, a document of how the old Bicchū tradition kept its quiet, archaic voice.
Yasutsugu (康次) — Mainline · 1211-1213. Kokuhō, Jūbun, Jūbi, Tokujū, Jūyō. Yasutsugu (康次) of Bitchū worked in the Ko-Aoe group in the early Kamakura period, around the Kenryaku era (about 1211 to 1213), and is transmitted in the *meikan* records as a son of Moritsugu. He is not the later Echizen Shintō Yasutsugu, whose name is written with different characters; he belongs instead to the old Aoe smiths who forged along the lower Takahashi river in the districts of Ko'i and Manju, the group the published sources count, from the late Heian period to about the middle of Kamakura, as Ko-Aoe. Among that group the NBTHK names him a representative smith, together with Moritsugu, Sadatsugu and Tsunetsugu. His standing rests on two very different kinds of work under one hand. The everyday Yasutsugu is restrained, what the published commentary on his usual manner calls "a small *midare-ba* in which the *ko-nie* adheres well"[[c:1]]. The famous Yasutsugu is the broad, flamboyant exception, of which the National Treasure tachi long held in the Shimazu family is the type.
His characteristic hand is the quiet one. Over a *shinogi-zukuri* tachi of high *koshizori* with strong *funbari* at the base, he tempers a *chū-suguha* very shallowly broken by *ko-midare*, *ko-chōji* and a little *ko-gunome*. The *nioiguchi* tends subdued and sunk, with fine *ko-nie* well attached, *ashi* and *yō* entering frequently and *kinsuji* playing here and there. The published sources describe this register as having, even within its plainness, a deep quiet elegance that shows the Ko-Aoe character, "a deep refinement within the subdued tone, presenting the characteristic Ko-Aoe flavor"[[c:2]]. Against the contemporary Bizen blades, the same commentary adds, the Aoe work reads "somewhat more restrained and austere in taste"[[c:3]]. A distinct sub-manner runs the *suguha* narrow, a *hoso-suguha* repeatedly overlaid with *yubashiri* in a *nijūba*-like effect, with the *ko-nie* again well attached.
The *jigane* is read first, for it carries the school. He forges *itame* mixed with *mokume*, the grain standing a little, taking on the crepe-silk *chirimen-hada* that is the Aoe *jigane*, with patchy *jifu* mixed in and clear *sumi-hada* appearing, the *ji-nie* fine and a faint *utsuri* sometimes rising. On the more worked blades the reflection clarifies into a distinct *midare-utsuri*. The *bōshi* runs *sugu* or *midare-komi* with a *ko-maru* return, sometimes almost *yakizume*. The signature is itself a kantei point and a school marker. Yasutsugu cuts a two-character *mei* low on the *haki-ura* of an *ō-sujikai* filed *nakago*, below the *mekugi-ana* and set toward the *mune*; the published record notes that placing the signature on the *haki-ura* is one of the things that "differs from Ko-Bizen and the like"[[c:4]]. The chisel is generally fine. As Honma observed of the school, "for Ko-Aoe, the chisel of Yasutsugu's signature is not excessively thick"[[c:5]], though on at least one shortened tachi the two characters are cut large with a thick chisel at the *nakago-jiri*, on the *haki-omote*.
The two registers sit within essentially one Ko-Aoe manner. The signed pieces are the restrained suguha and ko-midare, kept on *ubu* tangs with the two-character *mei*; the published commentary calls an *ubu*, signed tachi by this smith precious, since most of what survives is shortened. The mumei attributions hang on the second, flamboyant register: a wide *ko-midare* worked with *ko-chōji*, *ko-gunome* and small *tobiyaki*, the *habuchi* widening toward the *monouchi*, the *ha* full of *nie* with *kinsuji* and *sunagashi* running freely. The published sources are explicit that this is where his name is anchored, that as the Shimazu National Treasure exemplifies, "unusually for Ko-Aoe work, Yasutsugu can at times be seen producing flamboyant workmanship rich in activity"[[c:6]]に代表されるように古青江物としては珍らしく華やかで働きの多い出来), so that a mumei blade carrying that brilliance is reasonably specified to him. One Jūyō *katana*, greatly shortened, is attributed on exactly this reasoning, its broad notare-based temper rich in *tobiyaki* and reflection. The school itself the published sources place to about the middle of Kamakura as Ko-Aoe, after which it turns toward the *nioi*-based suguha and *saka-chōji* of its Nanbokuchō masters; Yasutsugu sits at the early core of that line, read in the same generation as Tsunetsugu, Tsugunao, Suketsugu and Kanetsugu.
What distinguishes him within his own group is read off his grounded traits, not by borrowing another smith's. The crepe-silk *chirimen-hada* with its *jifu* and *sumi-hada* is the Aoe ji that the published commentary names a principal point of interest of the tradition, and Yasutsugu shows it conspicuously; the subdued, sunk *nioiguchi* over fine *ko-nie* is his calm temper; and the *haki-ura* two-character signature in a fine chisel is the placement and hand by which his own blades are told. His masterwork sets the upper bound of the whole group. Of the Shimazu tachi the published sources write that its *midare-ba* is "of a workmanship without parallel as Ko-Aoe, flamboyant"[[c:7]], a blade "ranked among the Tenka Go-ken, the long heirloom tachi of the Shimazu family"[[c:8]] alongside the Dōjigiri Yasutsuna and the Ō-Denta. That a single early Aoe smith stands at once for the quiet base of the group and for its most celebrated exception is the whole of his standing.
Yasutsugu is *Jō saku* in Fujishiro's grading, with a *Tōkō Taikan* valuation near the top of the old smiths. The weight of designation behind his name is real but narrow: one National Treasure, one Important Cultural Property, one Important Art Object alongside a second of the same, one Tokubetsu Jūyō and four Jūyō, five blades across the Tokubetsu Jūyō and Jūyō tiers. The provenance recorded against his work is distinguished, seven blades carrying a history through the Shimazu of the National Treasure tachi, the Kuroda of Chikuzen who held the imposing Tokubetsu Jūyō *ubu* tachi, the Kikkawa and Yamauchi houses, the Imperial Family, and the Ōkura collections, his Important Art Object passing from the Ōkura Shūkokan to the Ōkura Cultural Foundation. Of recorded whereabouts two of his blades are held by public institutions, the Tokyo National Museum and the Ōkura Museum of Art, the rest in long-held private hands. His National Treasure and Important Cultural Property are patrimony, preserved and never traded; the few designated blades in private hands come to market only rarely, and a signed, *ubu* tachi by him is among the scarcer things an early-Kamakura collector could encounter.
Kanetsugu (包次) — Mainline · 1211-1213. Jūbun, Jūbi, Tokujū, Jūyō. Kanetsugu (包次) is one of the best-known smiths of Ko-Aoe, the early stratum of the Aoe school of Bitchu Province, which the published sources trace to Yasutsugu around the Joan era (1171-1175). Works no later than roughly the middle of Kamakura are set apart under the name Ko-Aoe, and Kanetsugu is counted among its representative hands beside Moritsugu, Tametsugu, Tsugie, Tsugatada, Sadatsugu, Yasutsugu, Tsunetsugu, Toshitsugu, Suketsugu and Shigetsugu, most of whom carry the character 'tsugu'[[c:1]] as the common element of their names. The reference works place him in the line descending from Sadatsugu[[c:2]]; the older compendia name him a son of Moritsugu or of Sadatsugu[[c:3]]. He worked from the end of Heian into the early to middle Kamakura, before the slanting saka-choji idiom that would later define the flamboyant Aoe of Nanbokucho. Among Ko-Aoe smiths a comparatively large number of his works survive[[c:4]], so that his is one of the clearest signed records of the school's quiet early manner.
His is the restrained pole of Aoe. The temper is a suguha base carrying small undulations and small clove (直刃 with 小乱れ and 小丁子), with ko-nie well-adhering, hada-karami within the ha and sunagashi (砂流し) interwoven, the boshi straight turning back in ko-maru (小丸). The published descriptions praise the consistency of his hand above its drama: in his swordmaking there is, they write, almost no unevenness, and many examples are of fine quality[[c:5]]. The Tokubetsu Juyo tachi, deep in curvature, carries small midare with ko-choji over a chirimen forging mixed with sumi-hada and a kijimomo tang with bold o-sujikai file marks; in all respects, the notes conclude, it fully manifests the characteristic features of this school and smith, leaving nothing to be desired[[c:6]]. On a slender, ko-kissaki tachi of archaic and elegant form[[c:7]] the suguha runs narrow, tending to hotsure (ほつれ), with nijuba-like yubashiri (二重刃) and kinsuji (金筋) crossing both ji and ha.
The jigane is the school's own: itame mixed with mokume (板目 with 杢), standing somewhat in a fine, granular texture the references call chirimen (縮緬肌), with ji-nie applied and clear patches of sumi-hada (澄肌) in the ji. The published commentary makes this the school's tell, the mokume prominent and the surface slightly standing, often called crepe-like, with patches of jifu (地斑) mixed in, the tempering ranging from quiet suguha to small irregularity. Against the Bizen tradition the judges draw the distinction by feel: compared with contemporary Bizen work the overall impression, they write, is somewhat more subdued and astringent in savor[[c:8]]. The reflection in the ji is the quiet Bizen-kindred utsuri rather than the bright midare-utsuri of Ichimonji: on the Owari Tokugawa tachi the itame stands, mixed with mokume and sumi-hada, with a suggestion of utsuri[[c:9]], while on his finest pieces the reflection rises vivid.
One coherent Ko-Aoe hand is read across two registers rather than across periods, the default the quiet signed tachi above, a suguha to ko-midare. On the connoisseur pieces the ji speaks louder: the Juyo tachi of 2003 is forged in ko-itame with ko-mokume, overall fine yet standing, with dust-fine ji-nie thickly applied, fine chikei (地景) interwoven, patch-like jifu in places and a vivid midare reflection (乱れ映り) standing out, its temper a suguha base with a small gunome feeling (小互の目), the nioiguchi (匂口) tight and tending to subdue. The judges single this blade out as more thoroughly refined in its forging than is usual even within the school[[c:10]], and, since it signs on the omote like the Itsukushima tachi, hold it of high documentary value for the study of the smith[[c:11]]. The kinzogan-attributed katana shows the same register from the other side: clear patchy reflection (地斑映り), a bright nioiguchi, ko-gunome with small notare (小のたれ). Here the attribution is upheld from the work itself, the published commentary noting that the small notare in the hardened edge is a trait found in Kanetsugu's signed pieces[[c:12]], so that the tradition of attribution to this smith is entirely appropriate[[c:13]]. Aoe signatures, the references add, are cut boldly even on tachi as two-character mei (二字銘) on the ura in the manner of katana-mei.
Kanetsugu's place within Aoe is defined as much by what he is not as by what he is. He stands at the early, quiet pole of the school, before the slanting saka-choji and saka-ashi the later Aoe masters of Nanbokucho made their signature; that slant is absent from his work, and the calm small midare on a suguha base is the early register it would later displace. His sumi-hada and chirimen jihada are the school ji shared with the wider Aoe line, while his quiet suguha and the consistency of his hand mark him within it. The judges set Ko-Aoe apart from Ko-Bizen by feel and by craft, the bold two-character mei on the ura and the o-sujikai file marks among the points of difference they name[[c:14]]. No individual pupil is recorded. The compendia treat the Kanetsugu name as transmitted from the early through the late Kamakura period, so the signed mei spans more than one generation, the surviving signed and gold-inlaid work treated as one transmitted hand rather than split among them.
He is graded Jo-jo saku by Fujishiro and rated 1,500 in the Toko Taikan. The weight of designation behind his name far exceeds the size of his surviving record: four of his blades are Important Cultural Properties, with one at Tokubetsu Juyo and three at Juyo beneath them, so that the Tokubetsu Juyo and Juyo tiers together hold four. Eight of the surviving blades are signed, none unsigned, an unusually clean record for so early a smith. The traceable holders run to long-held patrimony rather than the market. A signed tachi at Itsukushima Shrine (厳島神社) is an Important Cultural Property, the rare exception in carrying its mei on the omote where Ko-Aoe generally signs on the ura. Another signed tachi descended in the Owari Tokugawa house, was certified Juyo Bijutsuhin in 1939, and is held by the Tokugawa Reimeikai Foundation and the Tokugawa Art Museum. The gold-inlaid katana survives with two large kirikomi (切り込み) struck into its edge, by which the published commentary recalls its martial use[[c:15]]. For a private collector the Important Cultural Properties are heritage, held in shrine and long-private collections and never to trade; of his Tokubetsu Juyo and Juyo blades a handful are on record, and one comes to open hands only rarely, a landmark of early Bitchu work when it does.
Tsunetsugu (恒次) — Mainline · 1207-1211. Jūbun, Jūbi, Tokujū, Jūyō. Tsunetsugu is one of the representative smiths of the Ko-Aoe school of Bitchu, the older Aoe that forged along the lower Takahashi river in a province the records praise for its swords from the close of the Heian period. The published sources name him plainly: "Tsunetsugu is a representative smith of Ko-Aoe"[[c:1]], held by one tradition to be the son of Moritsugu and the younger brother of Sadatsugu, and counted, the same commentary writes, "together with Sadatsugu and Tsugiie among the ban-kaji of the Retired Emperor Go-Toba"[[c:2]]. The name is not that of a single hand. Judging from the manner of signing, the NBTHK reckons there were "two or three of the same name within Ko-Aoe"[[c:3]], and elsewhere that "several smiths worked through the Kamakura period"[[c:4]] under it, so the published record treats Tsunetsugu as a representative name carried as a mainstay of the Aoe forge from the opening of Kamakura down into the Nanbokucho, rather than as one biography. Among the Tsunetsugu-name *meibutsu* stands the Juzumaru, one of the Tenka-Goken, famous as the protective *tachi* of the priest Nichiren, and the published commentary notes that this raises the name higher still.
His is the calmest *suguha* of the early Aoe hands. The signed *tachi* read on one consistent manner: a *suguha*-based *ha* that the published sources describe as "a suguha tone running shallow with a moist tendency"[[c:5]], faintly undulating, with *ko-midare* and at times *ko-choji* mixed in. *Ashi* and *yo* run into it constantly, and the *nie* is strong and well laid, with *sunagashi* sweeping through and *kinsuji* appearing in places. The *boshi* answers the temper, going straight and turning back in a small *ko-maru*. It is a quiet, even temper, the least flamboyant of the Aoe quartet, and its discipline is the first thing that marks his hand: where the Aoe brethren let the *midare* run, his stays close to the line, the activity carried inside it as *ashi*, *yo* and the occasional *ko-choji* rather than along its crest.
The *jigane* is the Bitchu steel, and the published record dwells on it: of one signed *tachi* the NBTHK writes that, the activity within the *ha* aside, "the jigane in particular is splendid"[[c:6]]. It is a *ko-itame* that stands a little, mixed with *mokume*, working up to the crepe-like surface the sources call *chirimen* (the same *tachi* is recorded as "showing a chirimen tendency", 縮緬風を呈し). Fine *ji-nie* gathers across it and *chikei* enter. On many blades the iron is broken by *jifu* and the clear patches the school knew as *sumihada*, and a faint *utsuri* rises in it, on the *o-suriage* pieces a *nie-utsuri* and, on the broader late work, *utsuri* standing in streaks toward the *shinogi*. A reverse tendency surfaces on a minority of blades, *saka-ashi* and even *saka-choji* mixed on the *ura*, a within-school tell that runs quieter in him than in his Aoe brethren. The whole is the speckled, deeply flavored *jigane* the NBTHK calls Aoe character, "quiet in tone, yet possessed of deep interest and savor"[[c:7]].
The work falls into two registers that the published descriptions keep distinct. The first is the signed core: comparatively small *ubu* or lightly shortened *tachi* in *shinogi-zukuri* with *koshizori* and a *ko-kissaki*, carrying a thick-chiseled two-character signature, the chisel-work so heavy the NBTHK calls strokes of this boldness rare. The placement is itself a kantei point, for the published commentary records that the signature falls now on the *haki-omote*, now on the *haki-ura*, and observes by way of reference that within Ko-Aoe the line descending from Masatsune signs *tachi-mei* on the front while the Sadatsugu group cuts to the back. The second register is the *o-suriage mumei* and *shu-mei* work attributed to the name, read as later Tsunetsugu: a *katana* bearing a red-lacquer "Aoe Tsunetsugu" attribution beside a Kanbun-era Hon'ami Kotsune *origami*, and the two unsigned *Juyo Bijutsuhin* blades, one judged late Kamakura, one Nanbokucho Aoe, which mark the later end of the line. Against this the NBTHK is candid that the multiplicity of hands leaves questions: of one signed *tachi* it allows that there is "some doubt regarding the inscription, leaving room for further study".
The published sources are equally careful to keep him apart from his homonyms. The same commentary that praises his *jigane* notes that "the name is found among the Ko-Bizen group as well"[[c:8]], both reckoned skilled, and the appraisal of the Ko-Aoe pieces is steadied by their own evidence rather than by the name alone: the *o-sujikai* file marks the NBTHK calls the prescribed Aoe convention, the bold thick-chiseled two characters, the speckled *jifu* and *sumihada* in the *ji*, and the disciplined *suguha* with its reverse-tending *ashi*. His tachi are placed against the wider Aoe field by these grounded marks, not by contrast with another school: the calm of his temper, the crepe-like Bitchu *jigane* and the bold signature set his Ko-Aoe work apart, and the records read the same hand across the early Kamakura to Nanbokucho span the name covers.
Fujishiro grades Tsunetsugu *Jo-jo saku*, and the Toko Taikan values his work among the upper rank of the early Aoe names. The designations behind the name sit high: one of his *tachi* is Tokubetsu Juyo, with seven at Juyo, three Important Cultural Properties, and two prewar Juyo Bijutsuhin among the unsigned work. No blade under the code is a National Treasure, so the patrimony preserved in trust is the three Important Cultural Properties, while the tradeable standing rests on that Tokubetsu Juyo and the Juyo tier. The provenance roll is notable for so old a name: blades carry histories through the Kishu Tokugawa family, the Uesugi family, the Tsuchiya family, the Arima family, and the Imperial Family down to the Emperor Meiji, and the Hon'ami Kotsune *origami* of Kanbun 8 fixes the *shu-mei* katana's appraisal in the seventeenth century. Of recorded whereabouts a handful are held in public institutions and a shrine, with others in long-private hands. A signed Ko-Aoe Tsunetsugu reaches the market only rarely; when one of the Tokubetsu Juyo or Juyo blades does appear it is a landmark for the collector of the older Bitchu schools, encountered with patience rather than sought, and the Juzumaru itself, a designated cultural property held in trust, is never among them.
Moritoshi (守利) — Mainline · 1224-1225. Kokuhō, Jūbun, Tokujū, Jūyō. Moritoshi is a smith of the Ko-Aoe, the early Bicchū line that forged along the lower Takahashi River around the estates of Koi and Manju, working from the end of the Heian period into the early Kamakura, dated by the swordbooks to about the Gen'nin era of 1224. The published sources give him a leading place in that line, naming him "together with Yasutsugu, Sadatsugu and Tsunetsugu one of the representative smiths of Ko-Aoe"[[c:1]]. A National Treasure tachi carries his two-character signature, and the Important Cultural Properties and the higher modern ranks carry it again, yet extant signed works are few; his record is almost wholly the signed tachi, several still in their original tang, and the foundation of what is known about him.
His characteristic hand is a quiet one. Over an *itame* mixed with *mokume*, often a *ko-itame* that stands a little so the published sources call it finely *hada-dachi*, he lays a *suguha* base into which *ko-midare*, *ko-chōji* and small *gunome* enter, with occasional angular *ha*; *ashi* and *yō* enter well, *ko-nie* adheres, and fine *kinsuji* and *sunagashi* run through. The temper is not the flamboyant clove-flower of the contemporary Bizen but a calm, small irregular line, and on the plainer pieces the *nioiguchi* tends toward *shizumi*, a subdued, settled feeling. The published sources read the whole as resembling the neighbouring Ko-Bizen and yet, "compared with Ko-Bizen, somewhat more restrained, yet possessing a distinctive, astringent flavor"[[c:2]].
The *jigane* is where his school speaks most clearly. The forging stands a little and turns blackish in tone, taking on the crepe-like *chirimen-hada* of the old Bicchū steel; dense fine *ji-nie* adheres, *chikei* enter frequently, and through the surface run the speckled *jifu* and patches of clear *sumihada*. In the darker bands an irregular *jifu-utsuri* stands out, and on the finest blades a *mizukage* rises at the *machi*. His is the speckled, sober reflection of Aoe rather than a clear bright one, and the published sources treat this *jigane*, standing and crepe-like, as the very thing that separates his work from the Ko-Bizen it otherwise recalls. The *bōshi* runs straight to a small *ko-maru*, at times with a little *hakikake*.
His work survives in essentially one register, the signed tachi, in width from slender to broad and finishing in a *ko-kissaki* or compact *chū-kissaki*, with high *koshizori* and strong *funbari*; one *ubu kodachi* survives, signed and carrying a *bonji* at the *koshimoto*. Within that one manner the published sources mark a top group. On the finest signed tachi and the *kodachi* the forging is, in their words, "more refined than is ordinary for the school"[[c:3]], the *ji-nie* densely and thickly applied, both *ji* and *ha* richly worked, the *suguha* deep in *nioi* and thick in *nie* rather than subdued; one such Tokubetsu Jūyō tachi is called a work of outstanding (*shushoku*) level, broad and bold in shape and sound in condition. The tang preserves the school's habits: *ō-sujikai* file marks, the signature cut on the *ha-ura*, and the smith's own chisel tell, the character 利 set a little closer to the *mune* than 守.
What sets him apart from his neighbours the judges name directly. A Bizen line also signed Moritoshi, but a Kanagawa tachi is appraised thus: "although there are smiths in Bizen who used the same signature, this work is judged the Moritoshi of Ko-Aoe"[[c:4]], and the basis is exactly his own traits, the standing *chirimen-hada*, the quiet *suguha* with its *shizumi*-toned *nioiguchi*, the *ō-sujikai* file marks and the *ha-ura* signature. His bright *chikei* and speckled *jifu-utsuri* over a subdued *suguha* place him within Ko-Aoe beside Yasutsugu, Sadatsugu and Tsunetsugu, and his quiet manner marks him out from the showier Bizen of the same years; the published sources hold his blades to demonstrate the points of appreciation of the school plainly, one Tokubetsu Jūyō tachi singled out as a piece in which "the characteristic features of Ko-Aoe are well shown."
For the collector he is a rare early name, graded Jō saku by Fujishiro. His finest blade is a National Treasure, held with the Important Cultural Properties and the Tokubetsu Jūyō and Jūyō ranks as patrimony rather than as anything that trades; the National Treasure tachi descends through the Kitsuka, Ōkōchi and Kikkawa families, and his blades are preserved in long-held collections and institutions with their own documented provenance, among them Atsuta Jingū and the Seikadō Bunko, with one tachi carrying a temple provenance to Rendaiji. Only a small number fall in the Tokubetsu Jūyō and Jūyō tiers, perhaps eight designated works on record beyond the protected pieces, and the published sources call surviving signed examples rare, an *ubu* and signed blade "valuable as reference material even among this smith's now-scarce works." A privately held signed Ko-Aoe Moritoshi comes to light only seldom, and to encounter one is a notable thing, a quiet document of how Bicchū forged beside the more brilliant Bizen.
Tametsugu (爲次) — Mainline · 1243-1247. Kokuhō, Jūbi, Jūyō. Tametsugu is a Ko-Aoe smith of Bicchu working in the early Kamakura period, and his name carries one of the celebrated objects of the whole tradition: the National Treasure tachi known as Kitsunegasaki, transmitted in the Kikkawa family. He is the maker the published sources reach for when they describe the early Bicchu manner, the steel of the province before the main Aoe line settled into the look the later centuries made famous. The records place him close in time to the Ko-Bizen smiths of the same generation, the *meikan* transmitting him as a son of Moritsugu active around the Jogen era, his extant work descending no later than the end of the Heian period into the early Kamakura. With Hira-Aoe and the great mid-Kamakura Aoe still ahead of him, he stands among the first hands whose blades let the school be recognized at all.
His recognized work is the slender signed tachi, several still in their original tang with the two-character mei cut on the *ha-ura*, high in *koshizori* with strong *funbari* and a small or medium point, one keeping the *kiji-momo* tang of an old blade. The tell of the hand is the *jigane*. Over an *itame* mixed with *mokume* that stands a little and carries *ji-nie*, the published sources find the speckled *chirimen-hada* of the Aoe *jigane*, patches of clear *sumihada*, and a quiet suggestion of *utsuri*. On more than one blade the description runs almost word for word, the forging becoming *chirimen-hada*, *sumihada* mixed in, an impression of reflection across the surface, and it is this crepe-like, clear-steeled *jigane*, rather than the temper, that the judges name as the school's mark on his blades.
Upon that *jigane* the temper divides in two, and the division is the spine of his record. The earliest blade, the one the sources call the oldest of the group and the nearest to the Kitsunegasaki, wears a deliberately calm hand: a *ko-nie suguha* into which *ko-midare* is mixed, *ashi* entering, the *nioiguchi* on a companion piece overall subdued, the *boshi* running straight to a *ko-maru* above a tang filed in *o-sujikai*. The later group, set a little after the National Treasure because the signature is cut in larger characters, is broader in the body and more vigorous in the *ha*: a *nie-deki ko-midare* gathering *choji*, in one Juyo blade returning in places to a *suguha* base with *ashi* well in and the edge full of *nie*, *hotsure*, *sunagashi* and *kinsuji*, in a Jubi blade widening at the center into a large *midare*. The published commentary calls this manner forceful and full of spirit, and the *boshi* there finishes not in a round but in *yakizume*.
The central question around him is one the sources refuse to close, and it is more interesting than any single feature. Examining the three Important Art Object tachi together, the judges hold all three to be Ko-Aoe yet write that 'they cannot at once be declared the work of the same hand'[[c:1]], that the oldest of them is the most archaic, and even of that one that 'it cannot be decisively identified with the celebrated National Treasure Kitsunegasaki Tametsugu'[[c:2]]. The manner of the signature differs blade to blade; the workmanship shades from the quiet early *suguha* to the later, showier *ko-midare*. Whether one smith changed across a working life or several smiths shared the name is left, in the institution's own words, to further study, which is exactly why the *ubu*, signed pieces are prized as documentary material for the school.
What sets him apart he shares with no neighbour in quite the same combination. Against the plainer *itame* of the Ko-Bizen smiths of the same years, his is the *chirimen-hada* *jigane* with *sumihada* and a suggestion of *utsuri*; against the flamboyant *choji-midare* the main Aoe line would later make its signature, his earliest hand is a quiet *suguha*. The published sources affirm his blades from precisely these two things, writing that 'the *jigane* and *hamon* clearly display the characteristic features of the Ko-Aoe group'[[c:3]] and that 'the archaic manner of workmanship is not later than the early Kamakura period'[[c:4]]. He is read, in short, by the old Bicchu steel and the calm of the early edge, the school caught at its beginning.
For the collector he is, before anything else, the maker of a National Treasure, and that fixes the terms. Fujishiro grades him Jo-jo saku. The Kitsunegasaki, the *go* tachi long held by the Kikkawa house and now in the Kikkawa Historical Museum, is patrimony preserved, not a thing that trades; the published sources call it a sword that predates Shoji 2. Beyond it his record is small and largely held: signed tachi reaching the prewar Juyo Bijutsuhin and, in the modern era, only a pair at Juyo, one passing through Iwasaki Koyata to the Seikado Bunko, one through Ninomiya Kojun to the Sano Art Museum, another formerly with Matsumoto Kenjiro. With a single locked National Treasure and only a handful of designated blades on record, a signed Ko-Aoe Tametsugu of recorded whereabouts is a rare thing to meet; one comes to light only seldom, and a privately held example would be, for a collector of early work, among the more memorable things to encounter, a document of how the Bicchu school began.
Suketsugu (助次) — Mainline · 1261-1264. Jūbi, Tokujū, Jūyō. Suketsugu of the Ko-Aoe school in Bitchū worked in the early Kamakura period and is transmitted as the son of Toshitsugu, one of the representative smiths of the Aoe group in its old phase. The name then ran through several generations to the end of Kamakura, a later bearer leaving a Shōwa-era date and the long signature reading Bitchū-no-kuni Masu-no-Higashi-no-shō Aoe Suketsugu saku[[c:1]]. Against that descent, the published sources fix the surviving works of this signature manner as the earliest of the name: by the *Meikan* there were three Suketsugu active in the Kamakura period, and of the works extant 「現存するものの中では最も時代の古いもの」[[c:2]] is what the judges call this hand. He works the quiet Ko-Aoe suguha, his tachi slender to standard in build with a high *koshizori*, *funbari* standing and a *ko-kissaki* or *chū-kissaki*; a *kodachi* and a *ken* survive in his hand, and one *ō-suriage mumei katana* is attributed to him.
His characteristic hand is a *chū-* or *hoso-suguha*, very shallowly undulating in *notare*, broken by a little *ko-gunome* with *ko-chōji* and *ko-midare* mixed in. *Ko-ashi*, *saka-ashi* and *yō* enter, *ko-nie* adheres well and the *nioiguchi* draws tight, with fine *kinsuji* and *sunagashi* playing and *kuichigaiba* or *hotsure* at the edge here and there. The *bōshi* runs straight and turns in a small *ko-maru*, at times lightly brushed with *hakikake* or tending faintly to point. The suguha base is the constant of his work, and what distinguishes him within the school is the degree to which that base is interrupted by *ko-gunome*, a little *ko-chōji* and *ko-midare* mixing with it. The *Aoe* slant, the *saka-ashi* and *saka*-tending elements that mark his fellows, is the muted side of him: where *saka* enters at all, it rides quietly on the *ko-gunome*. His is the calmest and least slanting of the named Ko-Aoe suguha.
The forging is a *ko-itame* mixing *mokume*, here and there running into *masame* and standing a little overall, with *ji-nie* attached and fine *chikei* entering. *Jifu* mixes into it and clear *sumihada* shows, the steel taking on the crepe-silk *chirimen-hada* the school is known for, the color tending slightly dark, and a faint, sometimes *dan*-like *utsuri* rising. The published sources generalize this base for the whole group and for him in turn: the smiths of this Ko-Aoe generation worked a forging in which *mokume* stands out and the *hada* tends to rise into 「いわゆる縮緬状の肌合」[[c:3]], with *jifu* often mixing in, over which they tempered either a calm suguha or a suguha broken by small *midare*, the *nie* generally well attached, the whole conveying, against the Bizen work of the same period, a quieter and more subdued flavor. *Horimono*, where present, are *bō-hi* run *kaki-nagashi* or carried through *kaki-tōshi*.
The signature is the school's own and the point the judges name. On the *haura*, the worn-inward face of the *nakago*, below the *mekugi-ana* and near the tang tip, he cuts a bold, large two-character *mei* with a thick chisel, the strokes deeply struck, paired with the steep *ō-sujikai* filing. The published sources read the date off the cutting: 「助次は同名数代あるが、この銘振のものが古い」[[c:4]], the bolder cursive forms being the earlier, while later hands keep the thick chisel but square the calligraphy toward *kaisho*. Within his work the judges set two registers. The rule is the quiet suguha above, the calm composition that 「同派の典型的且つ代表的な太刀」[[c:5]] displays. Against it stands a single flamboyant outlier: a Tokubetsu-Jūyō tachi on which, 「同派の常と相違して焼幅広く」[[c:6]], the temper hardens wide with *chōji*, *gunome* and *togariba*, *tobiyaki* and *hotsure* entering, the *bōshi* running wet and brushing into a flame. For this manner the judges point to 「国宝に指定されている島津家伝来の康次の太刀」[[c:7]], the Yasutsugu tachi handed down in the Shimazu house and designated a kokuhō, and call the blade a precious work showing one stylistic mode within Ko-Aoe.
What the published sources note plainly is that the individuality of the man himself is slight, the manner of the school standing forward more than the hand: even a representative tachi is praised yet marked as 「助次の個性に乏しい憾がある」[[c:8]]. The same restraint they read as a virtue, calling the work old and elegant, the quiet suguha showing well over a dignified stance, the *ji* and *ha* healthy and rich in quiet flavor. He sits at the early-Kamakura core of Ko-Aoe, named together with Moritsugu, Tametsugu, Tsuguie, Tsugutada, Sadatsugu, Yasutsugu, Kanetsugu, Tsunetsugu and his father Toshitsugu, most of them sharing the character *tsugu* as the family element. His quiet ko-gunome-broken suguha stands just upstream of the school's later turn toward the nioi-based suguha and slanting chōji-midare of its Nanbokuchō masters such as Naotsugu and Yoshitsugu. The judges name the school's tang evidence as the proof of the place: that the Ko-Aoe smiths cut the *mei* on the *haura* and file in steep *ō-sujikai* is a point of difference from Ko-Bizen and the like, and on his tang it is kept sharp and plain.
Fujishiro grades him *Jō-saku*. The weight of designation behind his name is substantial for so quiet a Ko-Aoe hand: four of his blades reach the Tokubetsu-Jūyō tier and a further nine the Jūyō, thirteen in the Tokubetsu-Jūyō and Jūyō tiers together, with two more on the prewar Jūyō-Bijutsuhin roll. Almost all are signed tachi; the surviving *ken* in his hand the published sources call 「古青江助次の現存稀な剣の作例は貴重であり、資料的価値も頗る高い」[[c:9]], the school's old steel showing fine *masame* near the edge with *ji-nie* thickly attached, *kuichigaiba* and *yubashiri* giving the *ji* and *ha* conspicuous activity. The recorded provenance is thin but real. One *kodachi* on the Jūyō-Bijutsuhin roll passed through Sugiyama Shigemaru, who held it with a Jūyō-Bunkazai Moritsugu tachi and *daishō* mountings before presenting it to Amiya, and was recorded with Ogura Yōkichi of Tokyo; the *ō-suriage mumei* attribution was recorded with Maeda Toshinari. Current whereabouts are partial: of those on record his blades are held by the Tokugawa Art Museum, the Hayashibara Museum of Art and Itsukushima Jinja, with the rest in private hands. A signed Ko-Aoe Suketsugu is not wholly beyond reach, since his blades trade within the Jūyō and Tokubetsu-Jūyō tiers; but most designated work is held rather than offered, and an example of the calmest old Aoe suguha comes to a private collector only rarely, and with patience.
Sadatsugu (貞次) — Mainline · 1184-1185. Kokuhō, Jūbun, Tokujū, Jūyō. Sadatsugu worked in Bitchū from the early Kamakura period, one of the representative smiths of the Ko-Aoe school that forged along the lower Takahashi River in the districts of Ko'i and Manju, where the province's iron had long been worked. The published sources name him beside Moritsugu, Yasutsugu and Tsunetsugu among the leading Ko-Aoe hands, all of them sharing the character *tsugu* that runs through the line. He is remembered, too, in an older tradition: since the *Kanchiin-bon Meizukushi* he has been counted, in the published record's words, among the swordsmiths in monthly attendance on the retired sovereign Go-Toba In, one of the *ban-kaji* (「後鳥羽院番鍛冶の一人に」)[[c:1]]. Which Sadatsugu of the several who bore the name was that earliest smith is a question the sources leave open, but the standing of the name is not in doubt: the published commentary holds him to be, in its phrase, particularly skilled within the school (「一派の中でも特に技量の高いことで知られている」)[[c:2]], and notes in the same breath that his signed work survives only in a handful, a few pieces that can be counted on the fingers.
His recognized hand is the slender tachi, *shinogi-zukuri* with *iori-mune*, mostly shortened in later centuries yet keeping a high *koshizori* and a compact *ko-kissaki*, the archaic dignity of an old court tachi. The *jigane* is the constant and the tell. Over a well-packed *ko-itame* mixed with *mokume*, the steel stands a little into the crepe-like texture the school is known for, the so-called *chirimen-hada*, with *ji-nie* adhering well, fine *chikei*, and patches of *jifu* in the *ji*. The published sources fix on exactly this, calling the *chirimen-hada* the mark of the school on his work (「縮緬肌にこの派の特色を見せ」)[[c:3]]. It is the feature that separates him from the Ko-Bizen smiths whose work his otherwise resembles, the Bitchū steel showing its own grain where the neighbouring province runs cleaner.
Over that *jigane* the temper stays comparatively calm. A *suguha*-toned base carries a *ko-midare* into which *ko-chōji*, *ko-gunome*, *gunome* and a touch of *chōji* enter, with *ashi* and *yō* well in, *ko-nie* gathering thickly, and *sunagashi* and *kinsuji* running through. On the finest of his Jūyō tachi the *nioiguchi* turns bright, *nijūba* and *yubashiri* spilling into the *ji*, while another keeps the line low and quiet. The *bōshi* runs straight and turns back in a round or large-round on the *omote* and a small-round on the *ura*, often with a little *hakikake*. This is the Aoe character the published sources describe at length: set against contemporary Bizen, the work shows, in their words, a somewhat plain and astringent taste (「同時代の備前物に比べると幾分地味で渋い味わい」)[[c:4]], the *nie* well formed but the whole register held back from the open clove-flower flamboyance of the great Bizen ateliers.
The nakago carries the rest of the signature. Sadatsugu and the Ko-Aoe smiths cut the *mei* on the *ha-ura*, the side worn inward, and finish the tang in steeply slanted *ō-sujikai* file marks, both points by which, the published sources note, the school differs from Ko-Bizen and its kin (「銘を佩裏に切るのも古備前などとは相違」)[[c:5]]. His own two-character signatures are cut with a fine or a thick chisel and carry the reverse-chisel strokes the commentary singles out as characteristic. The convention is firm enough that its exceptions are worth recording: one Jūyō tachi is, in the published record's phrase, an exceptionally rare example in which Sadatsugu cut his authentic signature on the obverse (「佩表に銘をきった極めて珍しい作例」)[[c:6]], differing a little in nuance from his usual hand. Such variation, and the differing signatures across the few surviving blades, belong to the larger problem of how many smiths bore the name and over how long, a matter the sources hand on to further study.
What sets the Ko-Aoe Sadatsugu apart from his neighbours is exactly what the judges name. He is held apart from the Bizen mainstream by the quiet of his temper and the crepe of his *jigane*, his *ko-midare* and *ko-chōji* riding a *suguha* base rather than mounting into the towering clove clusters of Ichimonji or Osafune. He is held apart from the plainer old Bitchū work, in turn, by the level of his skill and the brightness of the *nie* his best blades carry. The published sources place his finest signed tachi in direct relation to the summit of the name, observing that it closely resembles the National Treasure Sadatsugu (「国宝貞次の太刀に類似」)[[c:7]], the tachi long transmitted in the Sō family of Tsushima. He stands, in short, at the high end of his own line, the calm and astringent answer that Bitchū gave to the splendour of Kamakura Bizen.
For the collector he is a rare early name, graded Jō-jō saku by Fujishiro. His record is crowned by that National Treasure tachi and includes work designated Important Cultural Property, with several signed pieces papered to the Tokubetsu Jūyō and Jūyō ranks. These higher blades are patrimony, held in museums and long-kept collections grounded in their own provenance, among them the Sano Art Museum and the Aomori City Museum, with one tachi recorded in the Taigarasu family. Of the surviving signed Sadatsugu, the published commentary speaks plainly: extant works are extremely few, and one Jūyō tachi is called, within so rare a signed corpus, valuable also as reference material (「在銘稀な同作中」), one of them indeed the most precious single key (「最も貴重な一本」) to the unresolved question of the *ban-kaji* smith. Only a small number fall in the Tokubetsu Jūyō and Jūyō tiers, so a signed Ko-Aoe Sadatsugu comes to light only seldom, with patience and at the very top of the market; a privately held example is a notable thing for a collector to encounter, a document of how Bitchū answered Bizen in the first age of the Japanese sword.
Sadatsugu (貞次) — Mainline · 1225-1227. Jūbun, Jūyō. Sadatsugu is an Aoe smith of Bicchu, working in the lower basin of the Takahashi River whose iron had been famous since the early-eleventh-century *Shin Sarugakki* listed "the swords of Bicchu" among the notable products of the provinces. The published sources call him "a representative smith of the Aoe forges"[[c:1]], placing him with the *tsugu*-signing masters of the line, a name that was carried on within the school down into the Nanbokuchō period. They are equally clear about the difficulty he presents: among works bearing the name there are signatures cut in a small manner, in an ordinary proportion, and in a somewhat later hand, so that "Sadatsugu is thought not to have been one man"[[c:2]]. His surviving signed blades are the spine of the record, and the one in the present catalogue is read, even within Ko-Aoe, as a work "of a somewhat later date"[[c:3]].
His characteristic hand is the *tachi*, *shinogi-zukuri* with *iori-mune*, deep in *sori* and finished with a *chū-kissaki*, the signature cut in two characters on the *ha-ura* near the *nakago-jiri* and toward the *mune*, the *yasurime* the steeply slanted *ō-sujikai* that marks a Bicchū tang. What distinguishes the work is not flamboyance but restraint: over the steel he sets a narrow *suguha*, the *nioiguchi* drawn tight and carrying *ko-nie*, into which only a measured *ko-gunome* and a little *ashi* enter, with *tobiyaki* appearing here and there toward the *monouchi*. It is the calm opposite of the towering clove-flower of mainstream Bizen, and the published sources name the orderly *suguha* with its suitably blended *ko-gunome*, set against the quality of the steel and a gentle bearing, "a piece that conveys the dignity of the Aoe school"[[c:4]].
The *jigane* is where the school speaks. On the signed *tachi* it is an *itame* mixed with *mokume*, inclining toward *masame* nearer the edge, with *ji-nie* adhering and *jifu* mixed through; on the shortened blade it tightens into a well-packed *ko-itame* with abundant *ji-nie* and *chikei*. Across both rises the Aoe *jigane* the published sources call "a *jifu*-toned *utsuri*"[[c:5]], the patchy reflection that stands in place of the clear *midare-utsuri* of Bizen and is the surest mark separating his steel from the otherwise comparable Bizen work. The *bōshi* runs straight to a small round, on the *ura* basically straight with *hakikake* and a somewhat long *kaeri*, and on the later blade a *bō-hi* is carved through.
What survives shows him in two registers of the one hand. The *ubu*, two-character signed *tachi*, with its small-style *mei* and *ō-sujikai* file marks, is his recognized type, quiet and orderly. Against it stands an *ō-suriage* blade whose long folded-back signature was, at some shortening, repaired and remade into an affixed inscription reading "Sadatsugu, resident of Bicchū Province"[[c:6]]; its multiple peg-holes show the blade was reduced more than once, yet the *suguha* and the fine *ko-itame* still carry the school's dignity. The variation in the manner of the signature across these works is exactly the evidence on which the published sources rest the conclusion that more than one smith used the name.
Within the Aoe line his hand sits beside the other *tsugu*-signing smiths, more subdued and astringent than the contemporary Bizen *chōji*. His own grounded tells set him apart: the *jifu*-toned *utsuri* in the steel, the narrow tight-*nioiguchi* *suguha* rather than a flamboyant *midare*, and the *ō-sujikai* file marks with the *ha-ura* two-character signature that the school cuts where Ko-Bizen would not. These, rather than any borrowed comparison, are what the published sources name as the basis of the Aoe attribution.
For the collector he is a scarce early Bicchū name. The Tōkō Taikan places him high, and his record is led not by the open market but by designated heritage: three of his blades are Important Cultural Properties, among them the signed *tachi* held by the Tokyo National Museum, a further signed *tachi* preserved in Toyama, and the *kinzogan*-attributed *katana* known as "Ō-Aoe," shortened and gold-inlaid with a Hon'ami appraisal. These are patrimony, held in museums and long-kept collections, and never come to market; one signed *tachi* of recorded whereabouts descended through the Kuroda house. Below them only a small number reach the Tokubetsu Jūyō and Jūyō tiers, so a signed Sadatsugu in private hands is among the rarer things a student of Ko-Aoe could hope to encounter, and one appears, when it does, only with patience.
Toshitsugu (俊次) — Mainline · 1211-1213. Jūbun, Jūbi, Tokujū, Jūyō. Toshitsugu is a Ko-Aoe smith of Bicchū, working in the early Kamakura period and transmitted in the reference works as a son either of Ko-Aoe Moritsugu or of Tsuguiye, with the Meikan placing his activity about the Kenryaku era. The Aoe school grew up in the iron country of the lower Takahashi river, around the villages of Aoe and Manju, and the published sources reserve the name Ko-Aoe for the work of the school that does not descend later than roughly the middle of the Kamakura period. Within that early body Toshitsugu stands as one of the names by which the manner is recognized, though the published commentary returns again and again to a single fact about him: that his signed work scarcely survives. The NBTHK states plainly that of this smith "extant signed works are exceedingly few"[[c:1]], and it is against that scarcity that each surviving blade is weighed.
His characteristic hand is the tachi, several still bearing a bold two-character signature cut on the ha-ura, one of them ubu with high koshizori and a small kissaki, the rest shortened yet keeping the old tachi carriage with marked funbari, one running to an ikubi-leaning point. Over the steel he sets a deliberately quiet temper. The base is a chū-suguha or a plain suguha into which ko-midare, ko-chōji and small gunome enter, ashi and yō coming in well, the nioiguchi deep in nioi with thick ko-nie, kinsuji and sunagashi running through it. It is not the flamboyant clove-flower of the great Bizen schools but a calm irregular line, and on one broad late tachi a kuichigai-ba breaks the temper near the koshimoto while the nioiguchi turns bright and clear. The bōshi runs straight to a small ko-maru, and on the finest signed tachi turns back from suguha into a fuller ō-maru sweep.
The jigane is where the school speaks. Toshitsugu forges a ko-itame, in places an itame mixed with mokume that flows and stands a little, with ji-nie adhering and chikei entering, and through it run the patchy jifu and the crepe-like surface the published sources name a chirimen jihada, calling the texture in so many words a "crepe-like grain"[[c:2]]. A faint utsuri stands over that jigane on his signed pieces. On his most refined attributed work the reflection becomes his particular note: a suji-utsuri gathers near the edge while a midare-utsuri rises toward the back, and the two together give the layered, stepped dan-utsuri that sets those blades apart. The published sources read the whole of this Ko-Aoe manner as quieter than the Bizen work of the same day, "somewhat more subdued, with an astringent depth of flavor when compared with contemporary Bizen"[[c:3]].
His record divides into two faces. The first is the signed tachi already described, the foundation of any judgment of his hand. The second is the o-suriage mumei katana gold-inlaid Kōfū, broad in body with little taper from base to tip, thick in kasane, deeply curved, ending in a compact chū-kissaki, the jigane standing overall with minute ji-nie and the suji- and midare-utsuri that read as dan-utsuri. Because that powerful shape and those features bind it so closely to the signed Tokubetsu Jūyō tachi of the thirteenth session, the published sources judge it the work of the same smith. The file marks on the tang are a large ō-sujikai, named a point of appreciation for the school, and the commentary notes that many Ko-Aoe smiths, Toshitsugu among them, cut the signature on the ha-ura rather than the customary omote, calling the "large sujikai file marks a point of appreciation for this group"[[c:4]].
What separates Toshitsugu within his own province is exactly this calm. Where the wider Aoe stream and the Bizen schools beyond it carry a showier chōji-midare, his hand keeps to the suguha-based ko-midare over the chirimen jigane, the astringent register the judges treat as the old Bicchu taste. The thirteenth-session tachi is held up not merely as a good Toshitsugu but as a high point of the school as a whole, the NBTHK naming it "an outstanding piece not only among this smith's works but within the Aoe group itself"[[c:5]]; of an earlier Jūyō tachi the same body of commentary says that a piece of such quality "has no equal elsewhere"[[c:6]] among his surviving signed work. His standing rests less on volume than on the height of the few that remain.
For the collector Toshitsugu is a rare early name carried at a high rank. Fujishiro grades him Jō-jō saku. He has no National Treasures; his record runs instead through an Important Cultural Property, a tachi held at Dazaifu Tenmangū in Fukuoka, a prewar Jūyō Bijutsuhin now in the Sano Art Museum in Shizuoka, two Tokubetsu Jūyō and a small number of Jūyō, six designated works in all on the official record. The signed pieces are the precious ones, the published sources prizing the ubu tachi for keeping its original tang and signature; the o-suriage mumei katana, secured to him by its bond to the signed Tokubetsu Jūyō, is the other way his hand reaches a collection. With only a handful of blades across the Tokubetsu Jūyō and Jūyō tiers, and most of them held rather than traded, a signed Ko-Aoe Toshitsugu comes to light only seldom; a privately held example is a notable thing for a collector to encounter, and a document of how quietly, and how well, the old Bicchu smiths worked beside the brighter forges of Bizen.
Moritsugu (守次) — Mainline · 1264-1275. Jūbun, Jūbi, Jūyō. Ko-Aoe Moritsugu (守次) is traditionally recorded as the son of Yasutsugu, who is regarded as the founder of the Aoe school of Bitchu Province. The name Moritsugu was transmitted across multiple generations, from the early Kamakura period through the Nanbokucho era, and sword reference works acknowledge several craftsmen bearing the same name even within the Ko-Aoe lineage. Among extant signed works appraised as Ko-Aoe, the forms of the *mei* comprise distinct types: examples cut with a powerful stroke in thick chiseling and in an almost block-script style; examples in a semi-cursive style (*gyosho*) with strong chisel impressions incorporating *gyaku-tagane*; and examples in a flowing cursive script (*sosho*) cut with a smooth, glossy manner. The former type appears to go back slightly further in time.
The characteristic workmanship of Moritsugu centers on a well-forged *itame-hada* mixed with abundant *mokume*, in which the grain tends to stand. Exceedingly fine *ji-nie* adheres thickly, bold *chikei* appear profusely, and a *midare-utsuri*-like cast rises across the surface, sometimes developing into *chirimen-hada*. The presence of *jifu* is noted in several examples. The temper line is fundamentally *suguha*, at times carrying a shallow *notare* tendency, mixed with *ko-gunome* and *ko-choji*; the *nioiguchi* is tight in feeling with *ko-nie* attached, and fine *kinsuji* and *sunagashi* enter. One setsumei observes that the *nioiguchi* is notably bright. The *bosshi* typically runs straight, forming *ko-maru* or tending toward *yakitsume*. Importantly, while Ko-Aoe smiths as a rule signed on the *tachi-ura*, Moritsugu is an exception, signing on the *tachi-omote*.
The NBTHK consistently praises the deep, tide-like appearance (*shio-ai*) found in Moritsugu's work as especially admirable, a dense visual effect prized in Aoe production. Works preserving an *ubu* tachi form with classical *koshizori* and *funbari* are noted for possessing a high sense of dignity. Extant works from the earlier generations are acknowledged as rare, lending them exceptional documentary value as source material for the study of the Aoe school. The quiet refinement of the *suguha* temper, combined with a bright *nioiguchi* and richly varied internal activity, clearly demonstrates the high technical level maintained across this lineage.
Tsugutada (次忠) — Mainline · 1232-1233. Jūbun, Tokujū, Jūyō. Tsugutada is a Ko-Aoe smith of Bicchu, placed by the published sources at the close of the Heian period into the early Kamakura, traditionally about the Joei years, and named variously a son of Tsugie or of Yasutsugu. His blades are all tachi, and several survive ubu, the original tang carrying a boldly cut, thick-chiseled two-character signature on the haki-ura. Of one such piece a Tokubetsu Juyo entry says plainly that it is "a large-scale work by Ko-Aoe Tsugutada"[[c:1]]. He belongs to the oldest stratum of the Aoe school, the Bicchu smiths who forged at Ko-i and Manju in the lower basin of the Takahashi River and whose work down to about the middle of the Kamakura is set apart as Ko-Aoe, a manner the sources describe as resembling contemporary Bizen yet quieter and more astringent in flavor in the jigane.
The tell of his hand is its restraint. Where the Bizen smiths of his age tempered brightly, his is a quiet, suguha-toned line, the yakiba on his finer tachi narrow, into which small ko-midare, ko-gunome and at times ko-choji enter with some height variation and ashi running in. Over it the nie adheres well, sunagashi and kinsuji appear frequently, and hotsure, uchinoke and yubashiri gather along the habuchi. The nioiguchi inclines to the subdued shizumi the published sources name the Ko-Aoe character, the astringency that, set beside the livelier Bizen nioiguchi, gives his work its antique fragrance. The boshi runs essentially straight to a small round, or scatters its nie and sweeps a little in hakikake at the tip.
The jigane is the constant of his record. The forging is an itame mixed with mokume that stands a little, running to the crisp, crepe-like chirimen-hada that the sources hold a hallmark of the Aoe jigane, the grain standing rather than packing flat as in Bizen. Across the ji lie the speckled jifu and, on his finest blades, patches of the clear-band sumihada, with ji-nie well set, chikei entering, and a faint utsuri rising. On the Naruse-family tachi the steel is at its most expressive: itame with mokume in a chirimen texture, sumihada mixed in, thick ji-nie, and a temper dropped above the machi in yakiotoshi, above which a fine suguha is the base, the lower half worked with hotsure, uchinoke and yubashiri, becoming ko-midare around the middle, the nioiguchi somewhat deep and falling, again, toward shizumi.
His record divides, as the judges themselves draw it, into two faces of one hand. The first is the dignified ubu signed tachi, high in koshizori with strong funbari and a compact point, the imposing period shape stated plainly, the temper comparatively calm over the speckled Aoe ji. The second is the austere, refined late manner, of which the published sources say his work has "a plain and somewhat rustic feeling"[[c:2]] and that "a deep and astringent, quietly resonant workmanship seems to be his hallmark"[[c:3]]. The tang on every blade is filed in the o-sujikai of the Bitchu convention, the signature set on the haki-ura, and on one piece the sources note that its placement above the mekugi-ana is unusual.
What sets Tsugutada apart from his Bizen neighbours is exactly that quietness. His faint utsuri and chirimen jigane, his small clove and gunome carried on a suguha base, and his sinking nioiguchi give him the astringent, antique character the published sources read across his oeuvre, against the brighter clove-flower of Bizen. Within Ko-Aoe he stands among its representative early hands, a smith whose work is plain and rustic, the quiet root from which the school's later Nanbokucho generations would grow. Several of his blades carry battle cuts and an arrow wound in the upper monouchi which, as one entry observes, speak of martial exploits in ages past.
For the collector he is a rare early name. Fujishiro grades him Jo saku, and the Toko Taikan values his work among the higher Ko-Aoe figures. The defining fact is scarcity: the published sources state that "extant signed tachi by Tsugutada number only two or three"[[c:4]], and call him a comparatively lesser-known figure within Ko-Aoe, so that each ubu, signed blade is a documentary source of exceptionally high value for the study of the smith. He has no National Treasures; his record runs through one Important Cultural Property, a single Tokubetsu Juyo and a few Juyo, with his blades preserved in long-held collections and institutions grounded in their own provenance, the Naruse family among the daimyo houses, and pieces held at the Tokyo National Museum and the Mori Shusui Museum of Art. The published commentary calls the Naruse tachi "a superior example in which Tsugutada's austere and deeply flavored style is well expressed"[[c:5]]. With so few signed examples on record and most of them held rather than traded, a signed Ko-Aoe Tsugutada comes to light only seldom, and a privately held example is a notable thing for a collector to encounter, a document of how the oldest Bicchu smiths worked their quiet, astringent steel.
Nobutsugu (延次) — Mainline · 1206-1207. Jūbi, Tokujū. Enji of Bicchu Province, Ko-Aoe[[c:1]], is the name the Tokubetsu Juyo tachi gives for this smith, and the published sources set him at the head of the line: he is held to be the first-generation Enji, traditionally the son of Ko-Aoe Moritsugu[[c:2]], with the name then carried down into the late Kamakura. He belongs to the Aoe group of Bicchu, the swordsmiths who appeared roughly two centuries after the early-eleventh-century reader Shin Sarugaku-ki listed "Bicchu swords" among the products of the provinces, and who worked the lower Takahashi River basin around Aoe and Manju. Within that group the works that do not descend later than the mid-Kamakura are called Ko-Aoe, the early Aoe, and it is to this earliest stratum that his blades are read. A question of generation comes with the name: the reference compilations record several smiths signing 延次 from the start of the Kamakura period onward, so the corpus carries a name borne by more than one hand, sorted out by date rather than by a difference of school.
His authenticated work is the signed tachi, slender and built with a high koshizori and funbari, the kissaki kept small, the tang on the least altered pieces remaining ubu in the kijimomo pheasant-thigh shape. The hand that recognises him reads first in the steel. Over a tightly forged ko-itame with fine ji-nie and chikei, the grain stands up across the whole blade and takes on the crepe-silk chirimen-hada of the school, the published sources writing that overall the grain rises into that crepe-like jigane[[c:3]]. Clear sumi-hada patches surface in the ji, ji-madara intermingles, and a midare-utsuri stands over it, the faint sumi-hada and reflection together the marks that hold his jigane to Aoe and away from a plain Bizen tachi. Over this he tempers a suguha base, shallowly notare, into which small gunome and small choji are mixed and ko-ashi enter well; the nioiguchi tends tight and shows bright and clear, and the boshi turns back in ko-maru. The published sources single out that brightly clear nioiguchi as the superb point of the work, judging on the Tokubetsu Juyo piece that the way it grows bright and clear is splendid[[c:4]].
The register is the quiet one of the early Aoe, and that is the point of him. His is a suguha-toned manner, not the saka-gunome flamboyance toward which the later Aoe smiths of the Nanbokucho would move, and the small clove and small gunome ride on the straight base as activity rather than govern it. The interest lies in the pairing of a calm temper with a busy ji: the standing grain, the crepe of the chirimen-hada, the patches of sumi-hada, the midare-utsuri laid faintly over all of it. The published sources read this whole as the school speaking through one of its founders, holding of the Tokubetsu Juyo tachi that in both jigane and hamon it well displays the distinctive features of the group and that its workmanship is excellent[[c:5]], and of the Juyo tachi that it clearly displays the features of the Ko-Aoe school in both ji and ha[[c:6]]. What separates his blades from a Bizen suguha tachi is therefore not the temper, which they share, but the jigane beneath it.
The corpus divides cleanly by date, and the division is one the published record itself draws. One of the two prewar Important Art Object tachi keeps an almost original kijimomo tang with a high koshizori and marked funbari, a faint sumi-hada appearing with ji-madara intermixed and a midare-utsuri standing out[[c:7]]; from its sugata and the work in ji and ha the published sources carry it back to the early Kamakura. The second is assigned instead to the mid-Kamakura, around the Bun'ei era of 1264 to 1274, its commentary opening by noting that several smiths signed Enji from the start of the Kamakura onward[[c:8]] and placing this piece with the later of them. It keeps the slender form and small kissaki, a tightly packed ko-itame with fine ji-nie and a tendency toward utsuri, the temper beginning in a gunome manner and resolving into a slightly ko-nie-laden suguha with ko-ashi. The signature itself is part of the recognition: a bare two-character mei is cut on the ha-ura near the tang tip, with a fine chisel yet in somewhat large characters, over a steeply slanted o-sujikai file pattern. The published sources note that within the Ko-Aoe tradition, not limited to Enji, it is standard to cut the signature on the ha-ura[[c:9]], and that the o-sujikai yasurime is a point not to be overlooked; on the Tokubetsu Juyo piece they add that the calligraphy of the mei precisely matches the example certified as an Important Art Object[[c:10]].
His standing is best taken from the school he opens rather than from a rivalry. Enji stands at the top of the Ko-Aoe genealogy as the son of Moritsugu, the name descending through the line to the late Kamakura. The published sources note that signed Enji tachi survive in relatively greater numbers than for most of his fellows, so the difficulty for the connoisseur is less one of authentication than of generation, of placing a given signed blade early or late within the run of the name. What recurs across his record as his own is consistent: the crepe jigane with its sumi-hada and faint reflection, the bright tight nioiguchi over a quiet suguha, the two-character ha-ura signature above steep file marks. These are not borrowed from a greater contemporary but are the early Aoe seen at its source, and unsigned attributions to the school rest on exactly this combination.
The Toko Taikan values his work in the middle range, and three of his blades stand on the official record as designated works. There are no National Treasures or Important Cultural Properties among them. The earliest are the two prewar Important Art Object tachi, one recorded in the Kozan Oshigata and the Imamura Oshigata, held by Konoe Fumimaro and now in the Yomei Bunko in Kyoto; the other owned at its designation by Seto Yasutaro of Hyogo. Above these stands a single tachi raised to Tokubetsu Juyo, with its Juyo record on the same blade. Enji is accordingly a smith of the early Aoe more approachable than the great Kamakura names yet still uncommon: his signed tachi appear from time to time and with patience, and most carry only the bare two characters of his name, so that placing the generation falls to the eye reading the crepe jigane and the bright suguha. A piece with secure provenance of the kind the Yomei Bunko tachi preserves, transmitted with its history and certified for its calligraphy, is the rarest among them and a landmark when one is encountered.
Yoshitsugu (吉次) — Mainline · 1288-1293. Jūbun, Jūyō. Yoshitsugu is counted among the representative smiths of the Bitchu Aoe school during the late Kamakura period. He bore the title Uemon no Jo and was a resident of Manju in Bitchu Province, belonging to the Naka-Aoe lineage. His long signatures — such as "Bishu Manjusho ju Uemon no Jo Yoshitsugu saku"[[c:1]] and "Bitchu no Kuni Aoe ju Uemon no Jo Taira Yoshitsugu saku"[[c:2]] — are the form most commonly encountered among his surviving works, with dated examples from the Gentoku and Kareki eras establishing his active period. Earlier works bearing shorter two-character signatures are also known and are thought to predate the long, dated inscriptions.
Yoshitsugu's workmanship conforms to the general manner shared by Aoe works of this period, with the characteristic features of the school well expressed. His tachi display deep curvature with a *chu-kissaki* that is somewhat compact. The *kitae* is *itame-hada* tending toward *hada-dachi*, with *ji-nie* adhering and areas of clear, refined steel mixed in. The *hamon* is typically *suguha*-based — whether *naka-suguha* toned with mixed *gunome*, or showing slight *notare* — with the *nioiguchi* tight and *saeru*, *ko-nie* attaching, and *ashi* entering frequently. The *boshi* is straight, forming *ko-maru* at the tip. The *yasurime* characteristically follow the *o-sujikai* pattern associated with the Aoe school.
Yoshitsugu occupies a position of importance as a representative figure of the Naka-Aoe lineage at its height. His works demonstrate the typical late-Kamakura style of the Aoe school, with forging and tempering of excellent quality[[c:3]]. Examples retaining *ubu* nakago are especially valued for the light they shed on the evolution of his signature practice, from early two-character *mei* to the long, dated inscriptions of his mature period. His finest blades are praised as being *kenzen* in both *ji* and *ha*.
Hirotsugu (弘次) — Mainline · 1184-1185. Jūbun, Tokujū, Jūyō. Hirotsugu is a Ko-Aoe smith of Bitchū province whose surviving signed work falls across the early to middle Kamakura period, the span under which the Aoe school's earliest and most archaic blades are gathered. The Aoe group worked at Ko'i and Manju in the lower Takahashi river basin, and is traditionally founded by Yasutsugu around the Jōan era of the early 1170s. The published sources place Hirotsugu within the *meikan* as a son of Kunitsugu, his period given as Kōan, the name continuing through several recorded generations from the Genryaku era down to a late appearance in the Bunwa era of the Nanbokuchō period. Against that documentary placement the workmanship of his surviving tachi reads older: the judges on the 24th-session Jūyō blade note that although the *meikan* gives a Kōan date, its two-character signature and archaic manner give it points in common with the early-Kamakura Aoe group[[c:1]]. His extant signed work is comparatively scarce, the commentary on the earliest of his Jūyō tachi noting only that he was an Aoe smith whose pieces are few[[c:2]], so his hand is read from a small but consistent body of slender tachi.
The forging is where his blades are first known, and it is the Aoe *jigane* in its clearest form. Over an *itame-hada* thick with *mokume* the grain stands and gathers into the crepe-like texture the school is named for, what the published sources call the so-called *chirimen* skin[[c:3]]. Through that crepe *ji* fine *ji-nie* attaches thickly and *chikei* enter, and into it is mixed *jifu*, the patchy mottling of old Bizen-related steel, out of which a faint *jifu-utsuri* rises rather than the bright *midare-utsuri* of contemporary Bizen work. This is the discriminating mark of his *jigane*: not a clear reflection read across the *ji*, but a speckled, quiet shadow gathered out of the mottling, the Aoe variant of the Bizen feature. It is a *jigane* of subdued depth, and the published sources, characterizing the school, say that compared with contemporaneous Bizen work it is somewhat plainer and carries a quietly astringent savor[[c:4]].
The temper sits over a *chū-suguha* base broken low into small *midare*, with a tendency toward small *gunome* and, on the more restrained blades, small *chōji*. *Ashi* and *yō* enter frequently, the work carried in *nie*, the *habuchi* showing *hotsure* with fine *sunagashi*; the *nioiguchi* runs deep and in places takes on an *urumi* softness. On the 60th-session Jūyō tachi, the richest of his extant *ha*, the activity opens further: *ashi* and *saka-ashi* together, the reverse-slanting feet that are the Aoe hallmark, with *ko-nie*, small *yubashiri* and *tobiyaki*-like spots, *hotsure*, *sunagashi* and *kinsuji* all entering. That *saka-ashi*, the feet slanting back toward the base, is the clearest point by which his *hamon* parts from the straight *ashi* of Bizen. The *bōshi* runs straight and turns back small, *ko-maru* on most blades and pointed on others, often touched by *hakikake*, and once ending in *yakitsume*. The signature is cut in two characters at the tip of the *nakago*, and four of the five surviving tachi are *suriage* with one preserved *ubu*.
Within that single coherent manner the published record draws one telling distinction, concerning the brightness of the *nioiguchi*. Many Ko-Aoe works tend to a *shizumi*, a sinking and subdued *nioiguchi*, part of what the sources mean in calling the school plainer than Bizen. Against this the Tokubetsu Jūyō tachi is singled out: whereas the usual Ko-Aoe blade sinks, this one is instead rather bright, a point the judges expressly draw attention to[[c:5]]. The same blade is read as expressing the features of the school with particular clarity, a crepe *ji* with *jifu* and a *jifu-utsuri*-like reflection, an archaic and well-*nie*'d *suguha* foundation mixed with small *midare* and a tendency to small *gunome*, the fine variation along the *habuchi* conveying an old flavor. The *ubu* 37th-session tachi shows the other side of his range, carrying *horimono*, a *suken* at the *koshimoto* and *bō-hi* with *soe-hi* run as *kaki-nagashi*, its two-character signature cut large with a thick chisel, the kind of confident original blade that anchors the reading of the *suriage* pieces.
Hirotsugu's place is among the early Ko-Aoe makers whose work the NBTHK gathers close to old Bizen, and his distinction is carried by his own attested traits rather than by the comparison: the crepe *itame* with its *jifu*, the faint *jifu-utsuri*, the *saka-ashi*-bearing *suguha* worked in *nie*. The published commentary on the 14th-session tachi reads the slender, shallow-*sori*, small-pointed build together with the small *itame* turning to *chirimen-hada* and the *suguha* base mixed with *ko-chōji midare* as clearly showing the characteristic features of the Aoe school of the Kamakura period[[c:6]], and finds it an excellent tachi in both *ji* and *ha*. His archaic, *nie*-worked *suguha* sets him apart from the later Aoe smiths, whose *saka-chōji* and *dan-utsuri* grew more pronounced into the Nanbokuchō period; he belongs to the quieter, earlier register of the school, the manner the sources repeatedly read as old-fragrant and classically elegant. The 60th-session tachi is judged a Ko-Aoe work rich in subdued savor whose activities in both *ji* and *ha* are full of nuance[[c:7]], valued besides as study material for an extant example by his hand.
The weight of designation behind his name is modest in number but high in tier. Of the works on official record, five are designated, reaching the Tokubetsu Jūyō and Jūyō ranks and one Important Cultural Property; there are no National Treasures. The Important Cultural Property tachi is held at the Akihasan Hongū Akiha Shrine, patrimony in shrine keeping rather than anything that moves, and one further blade is recorded as a Prefectural Cultural Property in private hands. None of his blades carries a recorded *denrai* lineage of owners, so the connoisseurship rests on the tier record and on the quality the judges read into individual pieces, foremost the Tokubetsu Jūyō tachi, whose original robust construction is described as well retained, a thick *kasane* and full *hiraniku* surviving the shortening into a *hamaguri-ba*, plainly a careful commission for a warrior house[[c:8]]. With his signed tachi few and the foremost held as cultural property, a Hirotsugu in open hands is among the rarer encounters in old Aoe work, the Tokubetsu Jūyō and Jūyō pieces reaching the market only seldom and a signed example a landmark when one does.
Aritsugu (有次) — Mainline · 1233-1234. Jūbun. Smith of the Bitchū Aoe School.
Koresuke (是介) — Mainline · 1190-1199. Jūbun, Jūyō. Smith of the Bitchū Aoe School.
Toshitada (俊忠) — Mainline · 1233-1234. Jūbun. Smith of the Bitchū Aoe School.
Tsuguie (次家) — Mainline · 1207-1211. Jūbun, Jūyō. Smith of the Bitchū Aoe School.
Suketsuna (助綱) — Mainline · 1247-1249. Tokujū, Jūyō. Suketsuna is a smith of the Ko-Aoe lineage, active in Bitchu Province from the late Heian through approximately the mid-Kamakura period. The swordsmiths of Bitchu are broadly divided into two groups: those of the Seno Kajishi line tracing their origin to Noritaka, and those of the Aoe Kajishi line whose signatures characteristically incorporate the character *tsugi*. Today, however, these are generally grouped together under the broad designation "Aoe smiths." While the name Suketsuna also appears among the Kamakura Ichimonji, Fukuoka Ichimonji, Osafune, and Kokubunji lineages, the works attributed to this maker belong specifically to the Ko-Aoe tradition, which flourished centered on Aoe along the basin of the Takahashi River. Extant signed works by this smith are comparatively rare, making each surviving example precious as documentary material.
In terms of workmanship, Suketsuna's blades display the hallmark characteristics of the Ko-Aoe school. The *jigane* tends toward *hada-dachi*, forming a *chirimen-hada* (crepe-like) texture[[c:2]], with *jifu* frequently appearing alongside well-adhering *ji-nie*. The *hamon* is consistently *suguha*-based[[c:3]], rendered in *ko-nie-deki*, often mixed with *ko-midare*, *gunome*, or *ko-choji*; *ashi* and *yo* enter within the temper, and *sunagashi* is sometimes applied. The *boshi* characteristically runs straight or in shallow *notare*, turning back in *ko-maru* with slight *kaeri*. *Bo-hi* are commonly carved through on both sides. The *nakago*, typically *suriage*, bears the distinctive Ko-Aoe practice of cutting the signature on the *ha-ura* side[[c:4]] with thick chisel strokes. Overall, when compared with contemporary Bizen works, the impression is more subdued and austere, with the *nioiguchi* tending toward *shizumi*.
Suketsuna's surviving tachi consistently exhibit a slender build with pronounced *koshizori* and *ko-kissaki*[[c:1]], preserving an archaic period character that does not descend later than the mid-Kamakura period. The combination of *jifu-utsuri* standing out clearly in the *ji*, the restrained *suguha*-toned temper with *ko-nie*, and the signature placement on the *ha-ura* side together constitute unmistakable hallmarks of the school. As works by this smith are few, each blade serves not only as an exemplar of Ko-Aoe craftsmanship but also as invaluable source material for the study of early Bitchu swordmaking traditions.
Moritsugu (守次) — Mainline · 1247-1249. Tokujū. Moritsugu (守次) was a smith of the Ko-Aoe school of Bitchū Province, traditionally regarded as the son of Yasutsugu, who is held to be the founder of the Aoe lineage. The name "Moritsugu" was inherited by successive smiths down into the Nanbokucho period, with extant works spanning from the early Kamakura period through the Bunwa and Enbun eras of the mid-Nanbokucho. Among signed works appraised as Ko-Aoe, scholarship distinguishes two signature types: a two-character *gyōsho* (semi-cursive) form, powerfully struck and incorporating *gyaku-tagane* (reverse chisel work), and a characteristically elongated, flowing *sōsho* (cursive) form. The former type appears to date slightly earlier. While Ko-Aoe works are typically signed on the *ha-ura*, Moritsugu is a noted exception, customarily signing on the *ha-omote*.
Moritsugu's forging characteristically shows *itame-hada* with vigorous *mokume* admixture that tends toward finely raised grain, frequently producing the distinctive *chirimen-hada* (crêpe-like texture) associated with the Ko-Aoe tradition. Dense *ji-nie* adheres thickly, with conspicuous *chikei* throughout, and a *midare-utsuri*-like reflection or faint mottled *utsuri* appears. His *hamon* is grounded in *suguha*, mixed with *ko-gunome* and *ko-chōji*; small *ashi* enter actively, and the *nioiguchi* shows a *shimarigokoro* (tightened tendency) with *ko-nie* adhering. Along the *habuchi*, features such as *hotsure*, *nijūba*, *yubashiri*, and *uchi-noke* appear, with *kinsuji* and *sunagashi* running through, yielding a bright *nioiguchi*.
The NBTHK characterizes Moritsugu's workmanship as displaying an archaic (*kochō*) manner that conveys a high level of dignity, combining grandeur with elegance. His blades are praised for richly varied workmanship and a "notably superior appearance." As rare extant examples from the Ko-Aoe group, works by Moritsugu are assessed as possessing extremely high documentary value for the study of the Aoe school, and those found *kenzen* in both *ji* and *ha* are termed "precious works."
Sukeyori (助依) — Mainline · 1288-1293. Tokujū. Sukeyori was a swordsmith of the Ko-Aoe school of Bitchu Province, active during the early Kamakura period. The Aoe lineage is traditionally traced to Yasutsugu of the Joan era (1171--1175) and thereafter produced many noted craftsmen through the late Nanbokucho period; works dating no later than approximately the mid-Kamakura period are especially distinguished as Ko-Aoe. Representative smiths of this early group include Moritsugu, Tametsugu, Tsugie, Tsugutada, Sadatsugu, Yasutsugu, Kanetsugu, Tsunetsugu, Toshitsugu, and Suketsugu, among others. In the *meikan*, Sukeyori is recorded with a Shoo-era dating[[c:1]] that is regarded as probably not greatly in error. All blades bearing the Sukeyori signature that have been confirmed in *shinsa* to date have been limited to *tachi*, and all share the consistent two-character *mei* and common features in both workmanship and manner of cutting the inscription.
Sukeyori's forging characteristically displays *itame* mixed with *mokume*, tending toward standing grain and producing the so-called *chirimen-hada* --- the crepe-like texture regarded as diagnostic of the Ko-Aoe group. The *jihada* is rich in *chikei* and *jifu*, with fine, thick *ji-nie* adhering throughout. A faint *utsuri* may stand up within the surface. The *hamon* is based on *suguha* with slight shallow *notare* or *ko-midare*, sometimes mixed with *ko-choji*; the *nioiguchi* shows a somewhat *shizumi* tendency, and thick *ko-nie* adheres, with *ashi*, *yo*, and occasional *nie*-streak-like activity producing a deep and resonant character. The *boshi* typically enters *ko-maru*, at times with *hakikake*. The *nakago* bears the distinctive *o-sujikai* filemarks and signature placement on the *ha-ura*, centered below the *mekugi-ana* --- conventions characteristic of the Aoe school as a whole and clearly distinguishing these works from contemporary Bizen production.
Compared with the forging usually encountered in this school, Sukeyori's finest works show a *ko-itame* that is uniformly tight, presenting a well-refined and notably elegant texture. The NBTHK has observed that both *ji* and *ha* clearly express the workmanship typical of this group, while conveying the subdued, austere flavor that sets Ko-Aoe apart from Ko-Bizen and related traditions. Extant works by Sukeyori are few, and *tachi* retaining an *ubu-nakago* are especially scarce, rendering authenticated examples exceedingly valuable as documentary material. His superior pieces are praised for a dignified form well complemented by an archaic *hamon*.
Kagetsugu (景次) — Mainline · 1190-1199. Tokujū. Smith of the Bitchū Aoe School.
Koretomo (是友) — Mainline · 1207-1211. Tokujū, Jūyō. Smith of the Bitchū Aoe School.
Moritsugu (守次) — Mainline · 1151-1154. Tokujū. Smith of the Bitchū Aoe School.
Sanetsugu (真次) — Mainline · Early Kamakura. Tokujū. Smith of the Bitchū Aoe School.
Takatsuna (高綱) — Mainline · 1204-1206. Tokujū. Takatsuna is a smith of the Ko-Aoe school in Bitchu Province, active from the late Heian period into the early Kamakura period. Although swordsmith reference works (*meikan*) list three smiths of Ko-Bizen named Takatsuna -- assigned respectively to around the Genkyū, Kangen, and Kōchō eras -- and further indicate the existence of several additional makers of the same name, the NBTHK has distinguished this Takatsuna as a separate figure within the Ko-Aoe lineage on the basis of forging characteristics, file marks, and the archaic character of the signature. Works attributed to him also appear in the Imperial Collection under the broader Yamashiro tradition, reflecting the overlapping classificatory frameworks applied to smiths of this early period.
Takatsuna's work is defined by an *itame-hada* forging mixed with *ko-mokume* that shows "a tendency toward *hada-dachi*" (standing grain), accompanied by thick *ji-nie*, fine *chikei*, and a prominent mottled *jifu-utsuri*. His *hamon* is fundamentally *suguha*-based, mixed with *ko-midare*, *ko-chōji*, and *ko-gunome*; *ashi* and *yō* enter frequently, with thick *nie* that in places becomes especially strong, producing *hotsure*, *yubashiri*, and a *nijūba*-like appearance. *Kinsuji* and *sunagashi* are described as "applied vigorously." In both *ji* and *ha*, "the characteristic features of Ko-Aoe are strongly expressed." The presence of old *ō-sujikai* file marks and the archaic manner of the signature characters further support the attribution.
The NBTHK describes Takatsuna's surviving work as revealing "the high technical level" and "high technical ability" of the smith, presenting "an excellent workmanship" and "an excellent *dekiba*." His blades are praised for their *kenzen* (sound and well-preserved) construction and for a "refined, well-worked forging with finely interwoven chikei." Beyond their artistic merit, they are regarded as "extremely valuable as documentary material" -- pieces that "help compensate for gaps in the meikan record," filling lacunae in the historical understanding of the Ko-Aoe school.
Other smiths
Tsuneyoshi (恒吉) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Chikatsugu (親次) — Mainline · 1278-1288. Chikatsugu was a swordsmith of the Aoe group (*Aoe-ha*) in Bitchu Province. Sword reference compendia (*meikan*) record smiths bearing the name Chikatsugu in both Bizen — at Osafune and in Nitta Manor (*Nitta-sho*) — as well as in Bitchu Aoe, and the name is further associated with a founder of the Hokke Ichijo lineage in Bingo Province. The Chikatsugu most prominently represented among designated works is recorded as the son of Sa-hyoe no Jo Chikatsugu, affiliated with the Kichiji group (*Kichiji-mon*), with dated works under the era names Genko and Ryakuo placing his activity in the late Kamakura to early Nanbokucho period, around Kagen (1303-1306). An earlier generation, attributed to the mid-Kamakura period around Koan (1278-1288), is associated with Ko-Aoe work and identified as the son of Aoe Suketsugu.
The forging of Chikatsugu's blades displays the Aoe school's distinctive traits in pronounced clarity. The *jigane* characteristically develops a *chirimen-hada* — the fine, crepe-like standing grain that is a hallmark of the group — while *ji-nie* adheres and *jifu* appears throughout. *Midare-utsuri* is observed on works of broader proportions. The *hamon* is fundamentally *suguha-cho*, a straight temper base into which small-pattern elements such as *ko-gunome*, *ko-choji*, and *ko-midare* are mixed, with *ko-ashi*, *yo*, *saka-ashi*, and *nezumi-ashi* entering the temper. The *nioiguchi* tends toward tightness with *ko-nie*, and on larger works the *ko-nie* deepens above the *monouchi*. Blades of the later generation present a commanding, dignified shape (*te-gara*) with wide *mihaba*, *funbari*, and *chu-kissaki*, while shortened earlier-generation works retain orthodox proportions and well-balanced form.
Chikatsugu's oeuvre illustrates the breadth of the Aoe tradition across the mid- to late Kamakura period and into the Nanbokucho era. The NBTHK examiners note that even where a blade shows a slight *tsukare-gokoro* — a somewhat fatigued tendency — the essential *tachi* shape of the Kamakura period has not collapsed, affirming these as good works. Works of the later generation are distinguished by their martial character; *kirikomi* on the *mune* stand as evidence of a blade's battlefield exploits. The transmission of individual pieces through eminent households, including the Kan'in-no-miya and the Sano Art Museum, attests to the enduring regard in which Aoe Chikatsugu's work has been held within the canon of Bitchu swordsmithing.
Hisatsugu (久次) — Mainline · 1243-1247. Smith of the Bitchū Aoe School.
Shigetsugu (重次) — Mainline · 1264-1275. A signed tachi designated at the 48th Jūyō session carries a two-character mei, Shigetsugu, cut boldly on the ura of a shortened tang filed in ō-sujikai, and the published commentary reads it as classic Ko-Aoe: "this tachi clearly displays the characteristics of Ko-Aoe.[[c:1]]" Shigetsugu is a smith of the Ko-Aoe, the early phase of the Aoe school of Bicchū Province. The published sources identify him with the craftsman recorded in the reference works as a son of Toshitsugu and placed in the mid-Kamakura period around Bun'ei (1264-1275); they note plainly that "this Shigetsugu corresponds to the smith transmitted in the meikan as the son of Toshitsugu, mid-Kamakura, around Bun'ei.[[c:2]]" The school itself is traced to Yasutsugu of the Jōan years, and works that do not descend past the mid-Kamakura are set apart as Ko-Aoe; among its representative hands the published record names Moritsugu, Tametsugu, Tsugie, Tsunetsugu, Toshitsugu, Suketsugu and this Shigetsugu, most of them carrying the character tsugu as a shared element of their names.
His surviving work is tachi, slender and well-shaped, with a deep koshi-zori and pronounced funbari, several still keeping their original tang. The hand that distinguishes him is a quiet one. Over an *itame* mixed with *mokume*, at times a closely packed *ko-itame* standing a little, he forges a steel somewhat dark in tone that tends toward *sumihada*, carrying the speckled *jihada-madara* and patchy *jifu* that are the Aoe *jigane*, with fine *ji-nie* and, on his most fully described blade, a clear *midare-utsuri* standing in the *ji*. The temper over that *jigane* is calm and archaic, a *suguha* base shallowly *notare* into which a small *ko-midare* of *ko-gunome* and *ko-chōji* enters. *Ashi* and *yō* are well present, the *nie* thick and in places particularly strong, and *kinsuji* and *sunagashi* run frequently along the edge. The *bōshi* runs straight to a *yakizume*-like finish with fine *hakikake*. The published sources call the effect old in feeling and rich in *nie*, the activity gathered not in towering clove clusters but in the small reversed-clove line and its internal work.
The *jigane* is where his school shows most plainly. The somewhat dark steel, the *sumihada* and *jifu*, and the crepe-like *chirimen* texture set the Aoe *jigane* against the brighter, cleaner *ko-itame* of contemporary Bizen, and the published commentary draws the contrast directly, judging Ko-Aoe work "on the whole somewhat subdued and quietly astringent in flavour compared with Bizen blades of the same period.[[c:3]]" Over that *jigane* the *hamon* stays comparatively restrained. The published sources praise the most fully described of his blades for being "archaic in the temper, well covered in *nie*,[[c:4]]" with *ashi*, *yō*, *kinsuji* and *sunagashi* showing within, a deeply nuanced and engaging manner rather than a flamboyant one.
Not all of his record is so quiet. One of his shortened, two-character-signed tachi opens instead into a dense, double-flower *jūka-chōji-midare* in *nioi-deki* with a tendency toward *ko-nie*, the *ji* an *itame* standing a little with *sumihada* and an *utsuri*-like reflection. The published sources note that, set beside his quieter *suguha*-toned work, the manner of the signature and the workmanship differ across his extant pieces, so the activity can open here into a richer clove-flower line. That blade carries a cut-in inscription recording its shortening in Tenbun 10 (1541) by Fukui Ukyō-no-suke Koremune Tadanō, a documented later history laid over an early hand.
What the judges single out separates him within his own school as much as from his neighbours. Compared with the brighter, cleaner steel of Ko-Bizen, his somewhat dark *jihada* with its *sumihada* and *jifu* reads as the Aoe *jigane*; and against the school's own conventions the published record notes a telling exception. The three prewar Important Art Object tachi are signed on the *omote*, which the commentary remarks is "although Ko-Aoe works, exceptionally bearing tachi-style signatures,[[c:5]]" whereas the Jūyō tachi places its signature on the *ura* in the usual Ko-Aoe manner, the tang filed in *ō-sujikai*; the placement of the signature and the file marks are exactly the points the published sources name as distinguishing the school from Ko-Bizen, and they cite them in support of the attribution. He stands among the named early hands of Aoe, the quiet Bicchū counterweight to the brilliance of Kamakura Bizen.
For the collector he is a rare early name, graded Jō saku by Fujishiro. He has no National Treasures and no Important Cultural Properties; his record runs instead through three blades designated Important Art Objects before the war and one tachi designated Jūyō, four designated works in all, and the published commentary calls the surviving examples precious, holding that "extant works by Shigetsugu are rare, and this one is precious[[c:6]]; moreover it has high value as reference material for the study of the smith.[[c:7]]" Their provenance runs through the great daimyō houses: the three-character Shigetsugu saku tachi was transmitted in the Kishū Tokugawa family before passing to Hon'ami Kōson, another descended through the Tokugawa house to Tokugawa Iesato, and a third was held by Miyazaki Tomijirō of Kanagawa. So few of his blades survive, and so seldom does a signed Ko-Aoe Shigetsugu come to light, that a privately held example is a notable thing for a collector to encounter, valued less as an ornament than as a document of how the Aoe school worked in its earliest age.
Yasuyuki (安行) — Mainline · 1256-1257. Smith of the Bitchū Aoe School.
Hidetsugu (秀次) — Mainline · 1260-1261. Smith of the Bitchū Aoe School.
Koreshige (是重) — Mainline · 1233-1234. Smith of the Bitchū Aoe School.
Kuniyuki (国行) — Mainline · 1199-1201. Smith of the Bitchū Aoe School.
Sadatsuna (貞綱) — Mainline · 1150-1185. Smith of the Bitchū Aoe School.
Sanemori (眞守) — Mainline · 1219-1222. Smith of the Bitchū Aoe School.
Tametsugu (爲次) — Mainline · 1184-1185. Smith of the Bitchū Aoe School.
Tsugutada (次忠) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Tsugutsune (次恒) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Tsuguyori (次依) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Tsuguyoshi (次吉) — Mainline · 1238-1239. Smith of the Bitchū Aoe School.
Tsunekiyo (恒清) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tsunetsugu (恒次) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Tsuneyoshi (經義) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Yasutsugu (安次) — Mainline · 1171-1175. Smith of the Bitchū Aoe School.
Yori (頼) — Mainline · 1222-1224. Smith of the Bitchū Aoe School.
Yoritsugu (頼次) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Yukitsugu (行次) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Arihiro (在弘) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Arisue (有末) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Aritada (有忠) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Aritada (有忠) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Ariyuki (有行) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Ariyuki (有行) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Ariyuki (有行) — Mainline · 1213-1219. Smith of the Bitchū Aoe School.
Ariyuki (有行) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Chikanori (親則) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Chikatoshi (親利) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Fujitsugu (藤次) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Harutsugu (張次) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Hiromichi (弘道) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Hirotsune (弘恒) — Mainline · 1222-1224. Smith of the Bitchū Aoe School.
Hisatsugu (久次) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Kanenaga (包永) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Kanetsugu (兼次) — Mainline · 1288-1293. Smith of the Bitchū Aoe School.
Kanetsugu (包次) — Mainline · 1185-1190. Smith of the Bitchū Aoe School.
Kanetsugu (包次) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Kanetsugu (兼次) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Kanetsugu (包次) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Koreshige (是重) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Moritoshi (守利) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Moritsugu (盛次) — Mainline · 1224-1225. Smith of the Bitchū Aoe School.
Moritsugu (盛次) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Moritsune (守恒) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Morotsugu (師次) — Mainline · 1185-1190. Smith of the Bitchū Aoe School.
Morotsugu (師次) — Mainline · 1225-1227. Smith of the Bitchū Aoe School.
Morotsugu (師次) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Morotsugu (師次) — Mainline · 1288-1293. Smith of the Bitchū Aoe School.
Muneto (宗遠) — Mainline · 1207-1211. Smith of the Bitchū Aoe School.
Munetsugu (宗次) — Mainline · 1243-1247. Smith of the Bitchū Aoe School.
Munetsune (宗恒) — Mainline · 1213-1219. Smith of the Bitchū Aoe School.
Nagahisa (永久) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Nagamune (長宗) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Naoie (直家) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Naokage (直景) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Naotaka (直高) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Nariie (成家) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Naritaka (業高) — Mainline · 1222-1224. Smith of the Bitchū Aoe School.
Naritaka (業高) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Naritsugu (成次) — Mainline · 1213-1219. Smith of the Bitchū Aoe School.
Naritsugu (成次) — Mainline · 1233-1234. Smith of the Bitchū Aoe School.
Naritsuna (成綱) — Mainline · 1219-1222. Smith of the Bitchū Aoe School.
Narizane (業實) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Nobutsugu (延次) — Mainline · 1261-1264. Enji (延次) is counted among the representative smiths of Ko-Aoe in Bicchu Province, where swordsmiths of the Aoe group flourished centering their activity around Aoe and Manju in the lower basin of the Takahashi River. Sword reference works list multiple smiths of the same name within Ko-Aoe; the first generation is traditionally regarded as the son of Ko-Aoe Moritsugu, and the line continued down into the late Kamakura period. A surviving *tanto* bearing the date Genko 3 (1333) confirms a smith of this name active at the end of the Kamakura era. As noted in the *Shin Sarugaku-ki* of the early eleventh century, Kibi Province had long been known as a region of iron production, and "the swords of Bicchu" were already counted among the notable products of the provinces.
Works by Enji display a forging of tightly compacted *ko-itame-hada* with extremely fine *ji-nie* adhering thickly; in places a mottled, *chihan*-like complexion appears, and *midare-utsuri* stands out. The grain rises overall, taking on a *chirimen-hada* (crepe-like) texture. The *hamon* is fundamentally *suguha*, carrying a shallow *notare*, with *ko-ashi* entering; the *nioiguchi* tends toward a tightened appearance, is *nioi*-predominant with *ko-nie*, and is bright and clear. The *boshi* typically shows a *sugu* tendency, ending in *ko-maru*. Signed examples characteristically bear the *mei* on the *ha-ura* and exhibit large *o-sujikai* file marks -- conventions standard within the Ko-Aoe tradition. Earlier works present a *nie*-based suguha with a slightly subdued nioiguchi, mixed with small irregularities, while later-period examples show a calmer nie presence and a nioiguchi that tightens and becomes bright in the manner characteristic of late Kamakura Aoe workmanship.
Enji's works consistently reveal refined forging of excellent quality; the tightened nioiguchi suguha is well executed, and both *ji* and *ha* show a high degree of completion. Surviving signed examples are of great documentary value, allowing one to appreciate the smith's high level of technical capability and providing essential reference material for the study of both the Aoe school and this smith in particular.
Nobutsugu (信次) — Mainline · 1219-1222. Smith of the Bitchū Aoe School.
Nobutsugu (延次) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Norinari (則成) — Mainline · 1260-1261. Smith of the Bitchū Aoe School.
Noritsugu (則次) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Noritsugu (則次) — Mainline · 1243-1247. Smith of the Bitchū Aoe School.
Norizane (則實) — Mainline · 1219-1222. Smith of the Bitchū Aoe School.
Shigetsugu (重次) — Mainline · 1240-1243. Smith of the Bitchū Aoe School.
Shigetsugu (重次) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Sukenari (助成) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Tadakuni (忠國) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tadatsugu (旦次) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tadatsugu (亘次) — Mainline · 1199-1201. Smith of the Bitchū Aoe School.
Tadatsugu (但次) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tadatsugu (忠次) — Mainline · 1234-1235. Smith of the Bitchū Aoe School.
Tadatsugu (忠次) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Tadayasu (但安) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tadayasu (但安) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tamenobu (爲信) — Mainline · 1225-1227. Smith of the Bitchū Aoe School.
Tamenobu (爲信) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Tamenori (爲則) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tamenori (爲則) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Tameto (爲遠) — Mainline · 1243-1247. Smith of the Bitchū Aoe School.
Tameto (爲遠) — Mainline · 987-989. Smith of the Bitchū Aoe School.
Tametoshi (爲利) — Mainline · 1260-1261. Smith of the Bitchū Aoe School.
Tametsugu (爲繼) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tameyasu (爲安) — Mainline · 1240-1243. Smith of the Bitchū Aoe School.
Tameyoshi (爲吉) — Mainline · 1222-1224. Smith of the Bitchū Aoe School.
Tokikuni (時國) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tokisada (時貞) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tokitsugu (時次) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Tokizane (時眞) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Tomoto (知遠) — Mainline · 1213-1219. Smith of the Bitchū Aoe School.
Tomoto (知遠) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Tomotsugu (朝次) — Mainline · 1219-1222. Smith of the Bitchū Aoe School.
Tomotsugu (朝次) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Tomotsugu (友次) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Tomotsugu (友次) — Mainline · 1243-1247. Smith of the Bitchū Aoe School.
Toshitsugu (年次) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Totsugu (遠次) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tsuguari (次有) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tsuguhide (次秀) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tsuguhiro (次弘) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Tsuguhiro (次廣) — Mainline · 1233-1234. Smith of the Bitchū Aoe School.
Tsuguhiro (次廣) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Tsugukiyo (次清) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Tsugumori (次守) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tsugumune (次宗) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tsugunao (次直) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Tsugunobu (次延) — Mainline · 1207-1211. Smith of the Bitchū Aoe School.
Tsugunori (次則) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tsugutoshi (次利) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Tsugutoshi (次俊) — Mainline · 1233-1234. Smith of the Bitchū Aoe School.
Tsuguyori (次頼) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Tsuguyori (次依) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Tsuguyoshi (次吉) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Tsuguzane (次眞) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Tsuguzane (次眞) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Tsuguzane (次眞) — Mainline · 1259-1260. Smith of the Bitchū Aoe School.
Tsuneie (恒家) — Mainline · 1227-1229. Smith of the Bitchū Aoe School.
Tsunekiyo (恒清) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Tsunemori (常森) — Mainline · 1222-1224. Smith of the Bitchū Aoe School.
Tsunemoto (恒元) — Mainline · 1259-1260. Smith of the Bitchū Aoe School.
Tsunemoto (恒元) — Mainline · 1243-1247. Smith of the Bitchū Aoe School.
Tsunenaga (恒永) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Tsunesada (恒貞) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tsunesue (恒末) — Mainline · 1238-1239. Smith of the Bitchū Aoe School.
Tsuneto (恒遠) — Mainline · 1257-1259. Smith of the Bitchū Aoe School.
Tsuneto (常遠) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Tsunetomo (常伴) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tsunetsugu (常次) — Mainline · 1207-1211. Smith of the Bitchū Aoe School.
Tsunetsugu (經次) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tsuneyori (常依) — Mainline · 1211-1213. Smith of the Bitchū Aoe School.
Tsuneyori (恒依) — Mainline · 1259-1260. Smith of the Bitchū Aoe School.
Tsuneyori (常依) — Mainline · 1213-1219. Smith of the Bitchū Aoe School.
Tsuneyori (常依) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Tsunezane (恒眞) — Mainline · 1225-1227. Smith of the Bitchū Aoe School.
Tsunezane (恒眞) — Mainline · 1233-1234. Smith of the Bitchū Aoe School.
Tsunezane (恒眞) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Tsunezane (恒眞) — Mainline · 1219-1222. Smith of the Bitchū Aoe School.
Yasuhiro (安弘) — Mainline · 1213-1219. Smith of the Bitchū Aoe School.
Yasutsugu (安次) — Mainline · 1199-1201. Smith of the Bitchū Aoe School.
Yasutsugu (康次) — Mainline · 1184-1185. Smith of the Bitchū Aoe School.
Yasutsugu (安次) — Mainline · 1211-1213. Smith of the Bitchū Aoe School.
Yasutsugu (安次) — Mainline · 1235-1238. Smith of the Bitchū Aoe School.
Yasutsugu (康次) — Mainline · 1233-1234. Smith of the Bitchū Aoe School.
Yasutsugu (康次) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Yoritsugu (依次) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Yorizane (依眞) — Mainline · 1234-1235. Smith of the Bitchū Aoe School.
Yoshitsugu (吉次) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Yoshitsugu (吉次) — Mainline · 1232-1233. Smith of the Bitchū Aoe School.
Yukitoshi (行利) — Mainline · 1247-1249. Smith of the Bitchū Aoe School.
Yukitoshi (行利) — Mainline · 1235-1238. Smith of the Bitchū Aoe School.
Yukitsugu (行次) — Mainline · 1199-1201. Smith of the Bitchū Aoe School.
Phase 2 · Chū-Aoe (中青江) · 1235 – 1334
The Chu-Aoe school represents the middle and culminating phase of the Aoe tradition of Bitchu Province, encompassing smiths active from the late Kamakura period through the Nanbokucho era. The lineage traces its origins to an ancient swordmaking heritage in the lower basin of the Takahashi River, a tradition already celebrated in the eleventh-century *Shin Sarugakki*, which counted "the swords of Bitchu" among the notable products of the provinces. Scholars conventionally distinguish earlier Ko-Aoe production, extending through the mid-Kamakura period, from the Chu-Aoe and later Sue-Aoe phases that carried the tradition forward. The name Sadatsugu -- transmitted since the *Kanchiin-bon Meizukushi* as one of the *goban-kaji* appointed to serve Retired Emperor Gotoba and accorded the highest valuation in the *Shinkan Hiden-sho* -- stands as the school's most prestigious lineage name, while Yoshitsugu, Naotsugu, Tsunetsugu, and Hidetsugu represent the principal working smiths whose signed and dated examples anchor the chronology of the late Kamakura Aoe group. With the transition into the Nanbokucho period, a second flowering emerged under Tsugunao, Tsuguyoshi, and Moritsugu, who are consistently identified by the NBTHK as the representative smiths of Aoe in that era.
The technical identity of Chu-Aoe is defined by a constellation of traits that recur with remarkable consistency across the school's members. The forging characteristically displays tightly packed *ko-itame-hada* mixed with *mokume*, upon which extremely fine *ji-nie* adheres thickly and delicate *chikei* are interwoven. A mottled, patch-like *jifu* texture frequently appears, and the distinctive crepe-like surface known as *chirimen-hada* is encountered among several smiths. Most diagnostic of all is the school's *utsuri*, which manifests in multiple forms: *midare-utsuri*, the stepped *dan-utsuri* in which linear utsuri near the edge transitions to midare-utsuri toward the *mune*, and the dark-toned *sumihada*. The *hamon* is fundamentally *suguha*-based, ranging from narrow *hoso-suguha* to medium *chu-suguha* with shallow *notare*, into which *ko-gunome*, *ko-choji*, and *saka-ashi* are mixed. The *nioiguchi* is universally described as tight, bright, and clear -- the single most defining quality of the school -- producing a deep *shio-ai* that is repeatedly praised in NBTHK assessments. The *boshi* characteristically runs straight, turning back in *ko-maru* with a tendency toward a pointed tip. A critical stylistic evolution occurred within the Nanbokucho period: while the late Kamakura smiths worked predominantly in suguha, the later generation developed a splendid, flamboyant *saka-choji-midare* that became the school's most celebrated mode. Tsugunao is recognized as "a master of saka-choji," producing tempering of such florid brilliance that the NBTHK characterizes it as "the exclusive forte of this group" -- an emblematic and highly individual domain. The reverse-slanting tendencies visible in earlier Kamakura-period works are understood as precursors to this splendid later development.
The Chu-Aoe school occupies a position of enduring prestige within the Japanese sword canon. The Hon'ami family developed a longstanding practice of rendering Sadatsugu appraisals for unsigned Aoe works of particularly fine workmanship, treating the name as a mark of the highest quality within the tradition. Naotsugu and Yoshitsugu, whose signed examples bearing official court titles and era dates from Gentoku through Kanno survive in exceptional condition, furnish irreplaceable documentary material for the study of Bitchu swordmaking. Works from the school have been transmitted through distinguished collections -- the Choshu Mori, the Nabeshima of Hizen, the Uesugi, and the Maeda of Kaga -- attesting to sustained appreciation across centuries. Naotsugu occupies a pivotal position at the transition from the *ko-nie-deki* manner of the Kamakura period to the tighter, brighter *nioi-deki* workmanship of the Nanbokucho era, while Moritsugu's rare surviving works bridge the late Kamakura and early Nanbokucho phases with tanto displaying both the traditional suguha and a saka-choji not previously encountered in the school. In both the quiet restraint of their suguha and the gorgeous brilliance of their saka-choji-midare, the smiths of Chu-Aoe demonstrate the Bitchu tradition at its most refined and accomplished -- a school whose tightly forged steel, luminous nioiguchi, and distinctive utsuri constitute an aesthetic achievement of the first order.
Tsugunao (次直) — Mainline · 1345-1361. Jūbun, Jūbi, Tokujū, Jūyō. Tsugunao of Bitchu stands with Tsuguyoshi and Moritsugu as a representative master of the Aoe school in the mid Nanbokucho period, and his record is unusually legible for that age: the published sources list extant dated works through the Jowa, Kan'o, Shohei, Bunna and Enbun eras (1345 to 1361), the center of his activity falling around Bunna and Enbun, and most pieces carry the long signature Bitchu no kuni ju Tsugunao saku[[c:1]] with the date cut on the reverse. The prewar designation record adds that this Tsugunao is said to have been a son of Yoshitsugu. Behind him the school divides in two. Ko-Aoe work, up to about the mid Kamakura period, is generally nie-based with a subdued nioiguchi and a large, standing hada; from the end of Kamakura the manner changes, and by the Nanbokucho period the published sources describe work that is nioi-based, with a vividly clear nioiguchi over a tightly packed ko-itame. Tsugunao belongs wholly to this later, clear-tempered Aoe, the line the sources call sue-Aoe, and he stands near its close.
The published sources state his work in a single recurring formula: two manners, one a flamboyant saka-choji-midare, the other a suguha with a tightened nioiguchi, both nioi-based and both executed at a high level. The first is the celebrated hand. One designation text speaks of "the saka-choji-midare that may be called Tsugunao's family art"[[c:2]], and another judges that this manner, its nioiguchi tight and so bright and clear, "was, within the Nanbokucho period, the sole domain of this school"[[c:3]] and its emblematic territory. In these blades saka-ashi and yo enter the ha frequently, the temper is nioi-dominant with ko-nie, fine kinsuji and sunagashi run through it, and the boshi comes in midare-komi, thrusts up, points and returns deeply. At its most flamboyant the midare can even leave the slant behind: an Enbun 6 naginata-naoshi, its choji lively in variation and rise and fall, is described as "a truly florid workmanship that recalls the Fukuoka Ichimonji", the single such comparison in his record.
The jigane beneath both manners is the school's own. Some blades retain what the published sources call the Aoe's original chirimen-hada, but most show a tightly packed ko-itame mixed with ko-mokume, ji-nie adhering thickly in fine particles, the peculiar mottled jifu the sources name namazu-hada, and clear patches of sumi-hada emerging here and there. On the finest pieces the reflection doubles: a midare-utsuri stands toward the mune while a straight band rises along the yakiba, together forming what the texts call dan-utsuri. The second manner rests on this steel. It is a chu-suguha, at times shading into shallow notare, mixed with ko-gunome and ko-choji, slanting here and there so that saka-ashi and yo enter even within the straight line; the nioiguchi is tight, bright and clear, and on a tachi dated Shohei 7 the sources note the fine nezumi-ashi. Famed though he is for the slanted midare, the designation texts repeat that "even when he tempers suguha he is skillful, and shows high technique", and one tanto in hoso-suguha is praised for a nioiguchi so crisply tightened and bright that it imparts a serene, restrained taste. Whichever manner he works, the sources observe, the boshi thrusts up with a pointed tip, a school tell that survives both hands.
The two manners divide largely by form. Of his tachi records nearly all, eleven of twelve, run to suguha, whether chu-suguha or hoso-suguha, while the flamboyant saka-choji is carried by the hira-zukuri blades, the sunnobi wakizashi and tanto of wide mihaba, thin kasane and shallow sori that wear the typical Nanbokucho silhouette, and by naginata-naoshi. His signing habits are themselves a study: the long mei with the date written down in one line, the kakikudashi-mei, is noted as not rare in the Aoe of this period, as is the rounded maru-mune construction; the southern court year Shohei 7 appears beside the northern Bunna and Enbun dates; and where most long blades of the period were later shortened into o-suriage mumei, his record preserves signed and dated tachi, among them an ubu blade of 89.8 centimeters dated Jowa 3. O-suriage mumei katana carry kinzogan attributions to Tsugunao by the Honami, Mitsutada or Kotsune, which the NBTHK upholds. The boundary of the name is drawn from the work itself: a tachi in gunome-dominant ha, unlike the choji-led temper of the Enbun-dated pieces, is read in Honma's recorded comment as "possibly later than the works with Enbun dates", and a hoso-suguha tachi is judged "probably a little later in date than the Enbun-dated works of Tsugunao", so the published record itself holds open the question of a later generation under the same name.
Within the school the manners divide between the masters: Tsugunao left more saka-choji-midare and Tsuguyoshi more suguha, and the sources write that "in this point he may be said to stand in contrast to Tsuguyoshi". What marks a blade as his are his own documented features in combination: the slanting set of the choji and ashi, the tight bright nioiguchi over a nioi-based ha, the sumi-hada and namazu-hada mottling in the packed ko-itame, the stepped dan-utsuri on the finest work, and the thrusting, pointed boshi. He stands at the close of the line the sources call sue-Aoe; no individual pupil is named in his record, but the blades judged later than his Enbun-dated work show the Tsugunao name carrying on past the prime master.
Fujishiro grades him Jo-jo saku, and twenty-seven designated works stand on record: three Important Cultural Properties, five Juyo Bijutsuhin, seven Tokubetsu Juyo and twelve Juyo. The provenance behind them runs through the great houses. The Maeda of Kaga held his Enbun 5 tanto as a treasure of the house, styled the Dai-Aoe (大青江) after the famous pair of Aoe meibutsu katana; a dated wakizashi formerly of the Yanagisawa is documented by the note on its old scabbard as the shogun Tsunayoshi's gift on his first visit to the Yanagisawa mansion in Genroku 4; a dated tachi descended in the Choshu Mori, a katana bears Mori Motoyasu's possession inscription in gold inlay beside the record of Umetada's shortening, another katana was transmitted in the Kishu Tokugawa house, and one tachi is accompanied by a letter of commendation of Tokugawa Hidetada together with its period uchigatana koshirae. The Important Cultural Property blades are patrimony, held by the Tokyo National Museum, the Tokugawa Art Museum and the NBTHK, and the Hayashibara Museum of Art holds one of the Juyo Bijutsuhin. For the private collector the realistic field is the nineteen blades of the Tokubetsu Juyo and Juyo tiers, most of recorded whereabouts in private hands; these are held rather than traded, and a signed, dated Tsugunao, of a kind the published sources themselves call rare among the survivors of this school and period, comes to market only seldom and is an occasion when it does.
Naotsugu (直次) — Mainline · 1335-1364. Jūbun, Jūbi, Tokujū, Jūyō. In Gentoku 2 (1330) Naotsugu (直次) of Bitchū signed a slender, high-koshizori tachi "Bitchū no kuni jū Sahyōe-no-jō Naotsugu saku"[[c:1]], the year cut in parallel on the shinogi-ji, and the NBTHK judges that title inscription with its date "valuable documentary material"[[c:2]] within his surviving work. He belongs to the Aoe school, which flourished along the lower reaches of the Takahashi river; the published sources open his records with the early eleventh-century Shin Sarugakuki (新猿楽記), which already lists "the swords of Bitchū"[[c:3]] among the famous products of the provinces. Work to about mid-Kamakura is called Ko-Aoe; what follows, into Nanbokuchō, simply Aoe. The Meikan places Naotsugu's activity around the Karyaku era (1326-29); he styled himself Saemon-no-jō and Sahyōe-no-jō, and with Yoshitsugu (吉次) he is counted among the representative smiths of the school from the very end of Kamakura into the opening of Nanbokuchō. His dated works begin with Gentoku, the oldest, and run across Jōwa and Kannō[[c:4]], Shōkei, Kenmu and Ryakuō standing between; the title heads the Gentoku and Kenmu pieces.
The foundation of his work is the suguha of this Aoe generation. Like the Aoe smiths of his time, the published sources note, his works are mostly built on a suguha basis[[c:5]], and in his hands that line is a hoso-suguha or chū-suguha, undulating only very shallowly, mixing a little ko-gunome, with ko-ashi, saka-ashi and yō entering. The nioiguchi is tight, carries a light ko-nie, and of one slender tachi the judges write that "both ji and ha are bright and brilliantly clear"[[c:6]]. The school's slanting habit rides in him on this quiet line rather than on a chōji-midare: saka-ashi recur from the Ryakuō tantō, where the rare nezumi-ashi also enters, to the monouchi of the broad den-Sahyōe-no-jō tachi, whose wide suguha admits gunome, ko-chōji and slanting, squarish elements. He holds to the narrow bright suguha more constantly than Tsugunao, the school's other great Nanbokuchō name. Activity beyond the line is sparing but fine: kinsuji on the Jōwa-dated tachi, and on the Gentoku 2 tachi fine sunagashi with uchinoke and yubashiri along the yakigashira, a deeply tasteful scenery at the edge.
The jigane is Bitchū's own. He forges a tightly knit ko-itame mixed with mokume, ji-nie thick and extremely fine, chikei entering minutely; jifu (地斑) mixes in again and again, the clear sumihada (澄肌) patches of the school appear, and a faint utsuri rises, sometimes a midare-utsuri, sometimes a thin straight utsuri close to the ha, and on the broadest tachi a jifu-utsuri forming dark bands. Of one two-character-signed tantō the NBTHK writes that the well-refined, tightly packed forging, ji-nie laid thickly and minutely, is exceptional[[c:7]]. The bōshi runs straight to a ko-maru return or tends to a point, at times lightly brushed with hakikake; the published sources warn that the shallow bōshi with its tip tending to point "must not be overlooked"[[c:8]], one of the important viewing points[[c:9]] of Aoe work in this period.
The signed and dated core of his work is remarkably consistent. His tantō are hira-zukuri with mitsu-mune, the kasane firm, the curvature absent or slightly inward; the Kenmu 2 (1335) tantō grows broad and slightly extended, the invocation Namu Kanzeon[[c:10]] on its ura, and the Ryakuō tantō is judged in both of its records an outstanding work within his oeuvre[[c:11]]. On ubu tantō the nakago takes the furisode form, and the steep ō-sujikai filing remains, "the viewing point of the school, vividly remaining"[[c:12]]; down the center runs a long mei struck deep with a thick chisel (太鏨), its reverse-chisel work so sharp that it, the published sources say, "carries on the Ko-Aoe tradition"[[c:13]]. Two tachi write the signature down the tang in a single line, and the den-Sahyōe-no-jō tachi is cut, unusually for this smith, in katana-mei, as both of its records note. The generation question stands as the sources leave it: the Jōwa-dated tachi is laden with ko-nie where Nanbokuchō Aoe work is generally nioi-deki, and so stands "close to the Kamakura-period work of the school"[[c:14]]; the Meikan, the same record adds, reads the Ryakuō and Enbun dates as a second generation[[c:15]], by which the Jōwa tachi would likewise fall to the second, while the designation records otherwise treat one representative Naotsugu across the passage.
A second register stands on Hon'ami authority. Three ō-suriage mumei katana, certified Jūyō Bijutsuhin between 1939 and 1947, carry the grand Nanbokuchō build, "broad in width and large in point, a bold and powerful figure"[[c:16]], their hamon turning gunome-predominant with saka-chōji and ko-midare: Hon'ami Kōon set his judgment in gold inlay, "Naotsugu, suriage kore, Hon'a"[[c:17]], and Hon'ami Kōshitsu attributed the katana of the Owari Tokugawa house. At the same edge stands the Shōhei 18 (1363) wakizashi made for one Murahashi Chōgo, its florid saka-chōji praised[[c:18]], its corroded signature transmitted as Naotsugu. Set against the school's arc, his place is the bridge. Ko-Aoe worked a ko-nie suguha with the nioiguchi slightly subdued; at the Nanbokuchō peak the nioiguchi tightens into bright, clear suguha and the characteristic saka-chōji-midare; and Naotsugu's quiet keen line, still carrying its ko-nie, stands immediately before that peak, the manner his mumei-attributed grand works adjoin.
Fifteen designated works stand on the official record: two Important Cultural Properties, a tachi and a naginata; three Tokubetsu Jūyō; seven Jūyō; and the three Jūyō Bijutsuhin katana, so that ten blades sit in the Tokubetsu Jūyō and Jūyō tiers. Twelve of the fifteen carry a mei; his name is anchored on those signed, dated pieces. The provenance recorded against his blades runs through the Tokugawa: the Reimeikai katana was the personal sword of Munechika (宗睦), ninth lord of the Owari Tokugawa, and remains with the Tokugawa Reimeikai; the gold-inlaid katana was held by Tokugawa Iesato at its certification; the third, once with Hon'ami Sumio, now belongs to the Sano Art Museum. Of recorded whereabouts they rest with the Tokugawa Art Museum, the Kyoto National Museum and the Sano Art Museum. The two Important Cultural Properties are preserved as cultural patrimony and will never trade; what a collector may realistically encounter is the Tokubetsu Jūyō and Jūyō tier, ten blades in all, and a signed, dated Naotsugu comes to the open market only rarely, a small and quiet masterpiece of the late Aoe suguha when it does.
Yoshitsugu (吉次) — Mainline · 1326-1332. Jūbun, Jūbi, Tokujū, Jūyō. In the eleventh month of Karyaku 3 (1328) Yoshitsugu (吉次) of Bitchū signed an ubu tantō "Bitchū no kuni jū Uemon no jō Taira Yoshitsugu saku"[[c:1]], an inscription the NBTHK judges of high documentary value. He belongs to the Aoe school, which flourished along the lower Takahashi river in a province the early eleventh-century Shin Sarugakuki already names for "the swords of Bitchū"[[c:2]]; work to about mid-Kamakura is called Ko-Aoe, what follows simply Aoe. The records name him, "together with Suketsugu, Yoritsugu and Naotsugu, one of the representative smiths of the school in this era"[[c:3]], and an older record calls him outright "the representative smith of the chū-Aoe"[[c:4]]. His dated works carry Karyaku (1326-29) and Gentoku (1329-31), and the residence in his long signatures is written now "Bitchū no kuni Aoe jū"[[c:5]], now "Bishū Manju jū"[[c:6]], a divergence the records expressly point out.
His foundation, and his declared strength, is the suguha of this generation at its calmest. Of the Karyaku 3 kodachi the judges write that it is "a blade in which the true mettle of Yoshitsugu, a smith whose forte is suguha, is displayed without reserve"[[c:7]]. The line is a chū-suguha, undulating shallowly in places, mixing ko-gunome, ko-chōji and ko-midare; ko-ashi and yō enter with saka-ashi among them, yet the slanting habit that marks the Aoe ha shows in him only partially, here and there. The nioiguchi tightens, carries ko-nie, and is bright and clear; fine kinsuji and sunagashi run through, and intermittent yubashiri near the base raises a nijūba-like effect. On the tantō the line narrows to a hoso-suguha with fine hotsure, the temper carried down through the hamachi, a habit shared also by the Gentoku 1 tantō of Sahyōe no jō Naotsugu[[c:8]]; of the Karyaku 3 tantō the record writes that the quiet suguha yakiba "overflows with a deep savor"[[c:9]].
The jigane is Bitchū's own. He forges a well-knit ko-itame mixed with ko-mokume and flowing hada, the ji-nie thick and extremely fine, minute chikei entering; jifu (地斑) recurs blade after blade, the clear sumihada (澄肌) of the school appears, and on the gold-inlaid Nabeshima katana the finely standing ko-itame takes on a crepe-like complexion[[c:10]]. Over this a faint midare-utsuri rises, and on the small works the utsuri divides, "a midare-utsuri toward the mune and a linear utsuri toward the ha"[[c:11]], the so-called dan-utsuri (段映り). The bōshi runs straight to a ko-maru return, at times tending to a point or lightly brushed with hakikake. Of the niji-mei tantō the judges write that the scenery of the utsuri and the tight, bright nioiguchi of the suguha are "Aoe through and through"[[c:12]].
The signed and dated core of his work is anchored on the title. He often cut long signatures headed Uemon no jō with the Taira clan name; among the signed reference works the published sources name a tachi in the Tokyo National Museum dated Gentoku 2 and a katana-mei blade at Hie Shrine, both Important Cultural Properties. His small works are rare survivals, "surviving examples of Yoshitsugu's tantō are exceedingly rare"[[c:13]], and the signed kodachi is likewise a form seldom seen in the school. A two-character mei cut on the haki-ura of one slender tachi is read as his earlier work, predating the long-signature pieces. At the far edge of the name stands a generation question: the Jūyō Bijutsuhin record matches the folded-signature katana of the Owari Tokugawa, a wide work in gunome-deki, to the Yoshitsugu the Meikan places in Nanbokuchō around Jōwa (1345-50), and calls the smith of the Karyaku tantō "presumably his predecessor"[[c:14]]; Honma adds the caveat that "appraisals to individual names within Aoe will always invite both assent and dissent"[[c:15]]. The designation records meanwhile draw the line by manner, noting of his quiet suguha tantō that "they differ in feeling from the works of the school of the Nanbokuchō period"[[c:16]].
A second register stands on kiwame. Ō-suriage mumei katana of deep curvature and ample hiraniku carry his attribution. The Nabeshima katana bears a gold-inlaid attribution, not a signature, recording its shortening in Genna 5 (1619), and its workmanship is judged "the typical late-Kamakura make of the Aoe school in both ji and ha"[[c:17]]. The mumei katana under a Kyōhō 9 (1724) origami of Hon'ami Kōchū, valued at 150 kan, is judged "an outstanding piece even among the Yoshitsugu attributions"[[c:18]], "a robust figure, heavy in the hand"[[c:19]]. The kiwame are honest: of the katana descended in the Naitō family the judges write that at a glance it might also be appraised as Bizen Motoshige or the like, "and it is difficult to assert Yoshitsugu definitively"[[c:20]], while holding it a late-Kamakura Aoe blade. Within the school his place is the quiet pole of the generation: where Naotsugu signs Sahyōe no jō, Yoshitsugu answers with Uemon no jō (右衛門尉) and the Taira name, and where the slanting chōji of Aoe comes out in force elsewhere, his blades keep the calm bright line, the saka element only glimpsed.
He is rated Jō-jō saku by Fujishiro, and seventeen designated works stand on the official record: two Tokubetsu Jūyō and ten Jūyō, twelve blades in those two tiers; three Jūyō Bijutsuhin; one Important Cultural Property, a signed blade preserved at Fujishima Jinja; and a signed blade, once of the Imperial Family and the Mōri family, now in the Kyoto National Museum. Eleven of the seventeen carry a mei, five are mumei under kiwame, and the Nabeshima katana carries its attribution in gold inlay. The provenance runs through great houses: the gold-inlaid katana descended in the Hizen Ogi branch of the Nabeshima family, recorded in the Tsuchiya Oshigata as "an ancestral sword worn at the first assault on Hara castle"[[c:21]], the blade of the Shimabara rising; the Naitō katana of Murakami carries the family tradition "Aoe Yoshitsugu bestowed by the Taikō"[[c:22]], received from Hideyoshi at the Odawara campaign of 1590; the folded-signature katana descended in the Owari Tokugawa and remains with the Tokugawa Reimeikai; the Karyaku-dated Jūyō Bijutsuhin tantō now belongs to the Sano Art Museum. The Important Cultural Property and the shrine and museum pieces are preserved as cultural patrimony and will not trade; a collector may realistically encounter the Tokubetsu Jūyō and Jūyō tier, twelve blades among them the dated tantō and tachi and the quiet suguha katana under kiwame, and one comes to the open market only rarely, a quiet masterpiece of the Aoe suguha at its calmest when it does.
Moritsugu (守次) — Mainline · 1356-1361. Jūbun, Jūbi, Tokujū, Jūyō. Moritsugu is an Aoe smith of Bitchū, his name traditionally derived from Yasutsugu, the founder of the Aoe lineage, and carried by several hands from the Ko-Aoe period down into the Nanbokuchō. The published sources are careful with the name: the Meikan lists more than one smith called Moritsugu even within Ko-Aoe, and the name passed on afterward, so that surviving works range from blades judged to the end of Kamakura through dated pieces of the Bunwa and Enbun years in the middle of the Nanbokuchō. His record falls into two faces, an early powerful tachi and a group of dated late tantō, and of the latter the commentary on one Enbun piece says plainly that this is the work of the last bearer of the name, 'the Moritsugu who brought that tradition to its close'[[c:1]].
The hand that runs through both faces is a calm, bright *suguha*. On the late tantō the temper is *nioi*-dominant and clear, the *nioiguchi* drawn tight, *ko-nie* gathered along it; one Bunwa tantō the published record calls a textbook of Nanbokuchō Aoe *suguha* work. On the early tachi the same line is a *suguha* base into which *ko-gunome* and *ko-chōji* are set, *ko-ashi* entering, fine *kinsuji* running, the *nioiguchi* bright. The judges single out this quality above all: the way a tight, bright *suguha* is tempered to produce a deep *shio-ai*, a salt-like depth in the hardened edge, they call 'superb'[[c:2]], and from it 'the high technical level of Moritsugu can be perceived'[[c:3]].
The *jigane* is the Aoe steel at two strengths. On the early two-character tachi it is a *ko-itame* mixed with *ko-mokume*, the grain finely standing, *ji-nie* adhering throughout in fine particles, *chikei* entering, and from the *hamon* boundary a somewhat faint *midare-utsuri* rising, the most refined *jigane* in his record. On the dated tantō the forging stands a little more, an *itame* that at times flows, mixed with *jifu* and *chihan*-like mottling, with a clear *utsuri* over it. The *bōshi* on both is essentially straight, turning back in a *ko-maru*, sometimes with *hakikake*, and on the tachi a *bō-hi* is carved through into the tang.
Within the dated work the published sources draw the period's central observation. The Aoe of this generation, they note, shows little conspicuous *nie* and becomes for the most part *nioi-deki*, and in it 'there are two manners, the traditional *suguha* and a splendid *saka-chōji* not seen before'[[c:4]]. Moritsugu's own work belongs to the first of these, the traditional *suguha*; the second, the reverse-slanting line, touches his hand only in the *saka*-inclined *gunome* of his Jūyō Bijutsuhin tantō, where the temper is a moist *nioi-deki* with reverse-leaning *gunome* mixed in. His shapes are of their moment: the early tachi wide and powerful with high *koshizori*, thick *kasane* and *funbari* in the Kenmu manner, the tantō *hira-zukuri* with a *sun-nobi* feeling or a faint *uchizori*, and one rare *shōbu-zukuri* piece the sources note as unusual for the smith and the school alike. Several of the tantō carry a *sankō-ken* or *goma-bashi* devotional carving in the groove.
What sets him within the school is the very thing the judges name. Against the flamboyant *saka-chōji* the late Aoe was then inventing, Moritsugu keeps the school's older line, a bright *midare-utsuri* over a fine *ko-itame* and a tight, luminous *suguha*. His powerful early tachi belongs to the classic Aoe manner of *suguha* and *utsuri*, while the dated tantō bring the long Moritsugu name to its end; one of his blades is judged so close in workmanship to the school's standard that its claim rests on era and lineage as much as on a personal tell. The strongest external anchor is documentary: the published sources find that the manner of cutting the signature on his finest tachi matches exactly the hand of the tachi long held by the Uesugi family, the Important Cultural Property known as the Rinpō Tachi, differing only in that his *bō-hi* carried through the tang forced the signature onto the *hira-ji* rather than toward the *mune*.
For the collector he is a rare and quiet name. Fujishiro grades him Jō saku; the Tōkō Taikan values his work in the upper-middle range. He has no National Treasures. His record runs instead through the Important Cultural Property tier, three blades among them, one Special Jūyō tachi and four Jūyō, with a single prewar Jūyō Bijutsuhin tantō, so that nine designated works stand on record. The most storied of them, the Rinpō Tachi descended through Uesugi Kenshin and his house, is preserved in the Tokyo National Museum, patrimony rather than property; the Jūyō Bijutsuhin tantō was certified in the Suzuki collection of Yamagata. Of the remainder the Special Jūyō and Jūyō tachi are the pieces that survive in private and recorded hands, and even these come to light only seldom, since extant Moritsugu of this period are few. A signed Aoe Moritsugu reaching a collector is an uncommon event, and a document of how the Aoe school carried its old *suguha* down to the close of its line.
Tsuguyoshi (次吉) — Mainline · 1338-1358. Jūbun, Tokujū, Jūyō. Tsuguyoshi is an Aoe smith of Bitchū Province, working in the Nanbokuchō period, whom the published sources rank alongside Tsugunao and Moritsugu as "one of the representative smiths of the Aoe school in the mid-Nanbokuchō period." The blades gathered under his name are signed and dated across the 1340s and 1350s, the years of Ryakuō, Jōwa, Kōō and Enbun, and the published commentary treats these dated, *ubu* pieces as valuable documentary material for the study of the smith and his school. He stands at a turning point in the long Bitchū story the same sources recall, in which the early-eleventh-century travel miscellany *Shin Sarugakki* already named "the swords of Bitchū" among the noted products of the provinces, and the Aoe smiths who flourished along the lower Takahashi River two centuries later inherited that reputation. Where their late-Kamakura work calmed and the Nanbokuchō work tightened, Tsuguyoshi is one of the hands in whom the school's clear, bright temper reaches its height.
His characteristic manner is the *suguha*, and the sources make the point as a plain rule of kantei: broadly "Tsuguyoshi tends to produce *suguha*, while Tsugunao more frequently shows reverse *chōji-midare*"[[c:1]], with a tight, bright *nioiguchi* shared between the two. His is a *chū-suguha* or a slender *hoso-suguha*, shallowly *notare*, into which small *ko-gunome*, occasional *ko-chōji* and angular elements enter, carried by *ko-ashi*, *yō* and a faint reverse-slanting tendency. The temper is *nioi*-dominant with *ko-nie*, fine *kinsuji* and *sunagashi* running within, and above all the *nioiguchi* is bright and clear. One Aoe wakizashi is called a typical example of the *suguha* associated with him, and of his signed *naginata-naoshi* the published sources say it shows "the working range of *suguha* in which the smith fully demonstrates his forte"[[c:2]], the *chikei* entering more conspicuously than in his usual production. The *bōshi* runs straight into a *ko-maru*, at times rising above the *yokote*, occasionally finishing in *hakikake* or *yakitsume*.
The *jigane* is the constant. He forges a well-packed *ko-itame* mixed with *mokume*, the grain at times finely standing, with very fine *ji-nie* set thickly in *mijin* and delicate *chikei* entering well; in places a *jifu*-like complexion and patches of *sumihada* appear, the speckled tells of the Aoe *jigane*. Over it a *midare-utsuri* stands toward the *mune*, and on his finest blades parallel streaks of *suji-utsuri* rise near the edge as well, the two layering into a banded *dan-utsuri*. The published sources name this their distinctive mark: of one dated Jōwa tachi they write that "the *midare-utsuri* appearing close to the cutting edge is a hallmark peculiar to this tradition"[[c:3]]. It is the *utsuri*, more than any flourish in the temper, that carries the eye on his blades.
Within his record the sources draw two further faces. One is a small group of pieces judged not from the school's Nanbokuchō height but from the very end of Kamakura into the early Nanbokuchō: of standard *mihaba* with little taper, the curvature high with *koshizori* and added *saki-zori*, the *chū-kissaki* not yet greatly extended, a form read as marking the entry into the new age, the same tight *suguha* and *dan-utsuri* over a closely packed *ko-itame*. The other is the reverse-leaning touch. The flamboyant *saka-chōji-midare* the sources hold more characteristic of Tsugunao is largely absent from his own blades, yet a reverse tendency enters his *suguha* as *saka-ashi* and a *gyaku-chōji* flavor: one *ō-suriage mumei* katana attributed to him widens into a *suguha* with reverse-slanting *ashi* and *gyaku-chōji* and a *midare-komi bōshi* that rises to a pointed turn, and the Important Cultural Property tachi recorded under his name, a long signed and dated blade, is described with a *ko-midare* and *gyaku-chōji* temper, the most pronounced of its kind on his record.
What sets him within the school is exactly what the judges name. His tang is filed in the *ō-sujikai* of the Aoe convention, the long signature often cut on the *haki-omote* toward the *mune* with the date written descending, a habit the sources call typical of Nanbokuchō Aoe work. Against Tsugunao he is the *suguha* hand; against Ko-Aoe, whose *suguha* is *ko-nie-deki* with a somewhat subdued, *shizumi nioiguchi*, his is the brighter, tighter, clearer temper of the later school. The published sources gather him with Tsugunao and Moritsugu as "one of the representative smiths of the mid-Nanbokuchō Aoe school"[[c:4]], and praise the broad, unhurried temper of one Jūyō tachi as full of commanding spirit, a work in which "the highlights of this smith, who excelled in *suguha*, are shown without omission"[[c:5]].
For the collector he is a documented Nanbokuchō name whose signed, dated blades survive in fair number. Fujishiro's rating is not recorded; the *Tōkō Taikan* values him in the upper-middle range. He has no National Treasures. His record runs instead through one Important Cultural Property, a long signed and dated tachi, and the higher modern tiers, one blade papered to the Tokubetsu Jūyō and some eighteen to Jūyō. His provenance is sparing and honestly so: an *ō-suriage mumei* katana attributed to him was transmitted in the Mito Tokugawa family, and the rest are held in private and institutional collections of recorded but partial whereabouts. Of the blades that can change hands, most are held rather than traded, so a signed Tsuguyoshi comes to market only from time to time and a dated, *ubu* example is a notable thing to encounter, valued, as the sources repeat, as reference material for understanding the range of his work.
Yoshitsugu (吉次) — Mainline · 1329-1331. Jūbun. Yoshitsugu is identified as the first generation of the Naka-Aoe school, one of the representative smiths of the Aoe group in Bitchu Province during the late Kamakura period. His full signature reads "Bitchu no Kuni Aoe-ju Uemon no Jo Taira Yoshitsugu saku," and he is known to have frequently cut long inscriptions accompanied by date markings. Dated works survive from the Gentoku (1329--1331), Karyaku (1326--1329), and Kenmu (1334--1338) eras, establishing his active period with unusual documentary precision. Among his most notable pieces are a *tachi* in the Tokyo National Museum designated as an Important Cultural Property and another Important Cultural Property at Hie Shrine, the former bearing a *tachi-mei* and the latter a *katana-mei*.
Yoshitsugu's forging characteristically shows a tight *ko-itame* mixed with *ko-mokume*, forming a dense, standing texture with fine *ji-nie* and delicate *chikei*; *jifu* are intermingled, and a deep *kanairo* tone pervades the clear steel, occasionally with *sumi-hada* and a tendency toward *nagare-gokoro*. His *hamon* is fundamentally *suguha*-based, mixed with small *midare* and, in certain works, a hint of *gunome-choji*; the temper is laid with *nioi* and deeply adhering *ko-nie*, with *ashi* and *yo* entering abundantly. In the upper portions of certain blades, *yubashiri* and *tobiyaki* appear, giving rise to a *nijuba*-like tendency, while above the *monouchi* the temper may become *choji-gakari* and somewhat gorgeous. The *boshi* ranges from deeply tempered with a *kaen*-like tendency to *midare-komi* turning in *ko-maru*.
The NBTHK assessments consistently praise the excellence of Yoshitsugu's forging, noting that even among his own works certain examples are conspicuous for the quality of the *jigane*. His blades are said to "excellently demonstrate the characteristics of this school," and their remarkably healthy condition is repeatedly commended. The preservation of *ubu nakago* with long *mei* in fine chisel work is noted as valuable reference material. With pieces held in the Imperial Collection presented to Emperor Meiji by the Mori family, Yoshitsugu occupies a distinguished position within the Aoe tradition as a smith whose dated, fully signed works anchor the chronology of the Naka-Aoe school.
Sadatsugu (貞次) — Mainline · 1346-1376. Jūbi, Tokujū, Jūyō. A wakizashi dated Shōhei 5 (1350), signed in full as Ōsumi no Gon no Suke Taira Sadatsugu of Bitchū Province and long held in the Naitō house of Nobeoka, fixes the Sadatsugu of this entry in time: not the early-Kamakura Ko-Aoe smith of the same name, but the Nanbokuchō continuation of the Aoe line in Bitchū. The published sources treat Sadatsugu as one of the representative houses of Aoe, the name carried in unbroken succession from the close of the Heian period down through the Nanbokuchō era. Within that long descent they recognize several distinct smiths working in different generations under the single name, a point the NBTHK states outright when it observes that within the Bitchū Aoe line 'multiple smiths of the same name are recognized'[[c:1]]. The most individual of the Nanbokuchō hands is Ōsumi no Gon no Suke Taira Sadatsugu, whose dated works run from Genkō through Shōhei and whom the published sources call a smith who 'reflects a notably strong individuality in his workmanship even within his school'[[c:2]].
His recognized work is the *hira-zukuri* tantō and wakizashi, wide in body and *sun-nobi*, thin in *kasane* with shallow *sori*, the bold and powerful shape of the Nanbokuchō peak. Over a *ko-itame* mixed with *mokume* whose grain stands finely into the so-called *chirimen-hada*, with minute *ji-nie*, *chikei*, and patches of clear *sumi-hada*-toned *jifu*, he takes the *suguha* broad, mixing in slight *ko-chōji*. The *nioiguchi* is tight and somewhat subdued, with thick *ko-nie*; *ashi* and *yō* enter densely, carrying the inward-slanting *saka-ashi* of the school. The most striking thing his judges name is what happens inside the temper. The *nie* gathers and condenses into *shima-ba*, islands of hardening within the *ha*; *kinsuji* and *sunagashi* are active; and the *bōshi* turns back in a *ko-maru* tempered deeply and long down the side. It is this that the published sources mean when they write that 'a certain bold, uninhibited flavour overflowing with vigour is why he is said to be an atypical presence within his school'[[c:3]].
The *jigane* is the constant beneath that activity. The forging is a tightly worked *ko-itame* with *mokume*, the grain standing finely to a crêpe-like *chirimen* texture, into which enter fine *ji-nie* in minute particles, delicate *chikei*, and the *sumi-hada*-toned mottling that the published sources call the clear-steel patches of Aoe; over it a faint, *midare*-leaning *utsuri* rises. The carving program on the tantō is devotional and economical, a *bonji* seed-syllable with a *suken* or *gomabashi* cut beneath it and run off; the long signature sits centrally in somewhat thick chisel, and the file marks are the steep *ō-sujikai* of Bitchū. These last two, the *ō-sujikai* tang and the *ha-ura* reverse-chisel manner of the inscription, are the tang tells the published sources set against the Bizen file when they place a blade with Aoe rather than its near neighbour.
The Sadatsugu name in the Nanbokuchō does not resolve to one man. A second body of signed work, dated through Jōji, Eiwa, and Kōryaku, is by a different and slightly later smith whom the published sources connect with the title Saiga Tarōbyōe no Jō, a maker known for cutting comparatively small signatures and favouring a calm, low-tempered straight *hamon*. His tantō and *naginata-naoshi* run a narrow *hoso-suguha* over a *ko-itame* that flows toward the edge, the *nioiguchi* tight with *ko-nie*, the edge breaking into *hotsure*, the *bōshi* a small *maru* or a *yakizume* finish. One such wakizashi the judges read as sharing a common thread with neighbouring Ko-Mihara in its standing *nagare-itame* and the *hotsure* of its fine *suguha*, yet on close view deeper and more active in the *ha*, and so affirmed as Aoe. The third face of the record is the *ō-suriage mumei* or gold-inlaid *naginata-naoshi* judged Sadatsugu, and the NBTHK explains the practice plainly: because Aoe Sadatsugu has been held first-rank since the *Kanchiin-bon Meizukushi*, with the *Shinkan Hiden-shō* valuing Bitchū work at the supreme grade, there is an old habit of attributing a typical, finely made unsigned Aoe blade to him. On the *Ebi Kusari-giri* *naginata-naoshi* they make it explicit, that such a gold-inlaid 'Sadatsugu' does not point to the Ko-Aoe smith himself but uses the name 'in the sense of a representative superior work of the school'[[c:4]].
What sets this Nanbokuchō Aoe apart is exactly what the published sources name as its own. Where the work resembles its neighbours it is by tradition rather than by borrowing: the standing *itame* with *jifu* and *ji-nie* is the Aoe *jigane*, and the temper, the judges write, follows 'what may be called the Aoe tradition, a *suguha* into which *saka-ashi* enter'[[c:5]]. On the *ō-suriage* attributions a bright *midare-utsuri* stands clear, and over it a *suguha* mixed with *ko-chōji*, *ko-gunome*, and small *midare* takes a *saka-gakari* turn, *nioi*-dominant and bright, *kinsuji* and *sunagashi* fine. The inward-slanting feet and clusters, the clear *utsuri*, and the bright tight *nioiguchi* are the marks that hold a blade to Bitchū and away from the Bizen *chōji* it might otherwise be mistaken for; against the famed Ko-Aoe name the surviving signed and attributed work is read.
For the collector Sadatsugu is a scarce Nanbokuchō name rather than a common one. Fujishiro grades him Jō saku. He has no National Treasures and no Important Cultural Properties; his record runs instead through one Tokubetsu Jūyō and fourteen Jūyō, with one prewar Jūyō Bijutsuhin, sixteen designated works in all on record. The published sources call the Shōhei 5 Ōsumi no Gon no Suke wakizashi a *kessaku* and the very finest among his works, sound in both *ji* and *ha*, and note that as surviving examples by this smith are few the dated pieces carry high documentary value. His blades descend through documented houses: the Tokubetsu Jūyō wakizashi in the Naitō family, lords of the Nobeoka domain in Hyūga; a dated wakizashi held by the Onuki family, hereditary chief retainers of the Satake lords of Akita; and two of the gold-inlaid *naginata-naoshi*, bearing the names *Kitakaze* and *Ebi Kusari-giri*, owned by Miura Shōgen, a senior retainer of the Kishū Tokugawa, one of them received from the prelate Tenkai. With only a small number in the Tokubetsu Jūyō and Jūyō tiers, a signed Aoe Sadatsugu comes to market only seldom, and a privately held example is a notable thing for a collector to encounter, a document of how the celebrated Aoe name was carried into the Nanbokuchō age.
Yorizane (依眞) — Mainline · 1368-1375. Jūbun. Smith of the Bitchū Aoe School.
Naotsugu (直次) — Mainline · 1288-1329. Tokujū, Jūyō. In Gentoku 1 (1329), in the twelfth month, Naotsugu (直次) of Bitchū signed a small hira-zukuri tantō "Bitchū-shū jū Sahyōe-no-jō Naotsugu"[[c:1]] with the date cut on the reverse, and the NBTHK calls it a fine piece that demonstrates the smith's high technique[[c:2]]. He belongs to the Aoe school of Bitchū, which forged along the lower reaches of the Takahashi river. The published sources divide its production in two: work to about the middle of Kamakura is called Ko-Aoe, and what follows, on into Nanbokuchō, simply Aoe. The Meikan places Naotsugu's activity around the Karyaku era (1326-29); he styled himself Saemon-no-jō and Sahyōe-no-jō, and together with Yoshitsugu he is counted among the representative smiths of the school in the passage from the very end of Kamakura into the opening of Nanbokuchō. His base, as the published record says of the Aoe smiths of this time, is suguha, with many of his blades built fundamentally upon it.
What distinguishes the hand is a controlled chū-suguha rather than the flamboyant chōji of an earlier Bizen. The nioiguchi tightens and brightens, ko-gunome and small angular gunome enter the temper, and faint ashi run toward the base with the reverse slant the school is known for, the saka-ashi that the published sources read as the mark of so-called Sue-Aoe. On the widest of his katana the edge is a naka-suguha with a tight nioiguchi, saka-ashi, ko-ashi and yō, and the nioiguchi is bright and clear; the bōshi rises a little before its return, a slight tsukiage that ends in a pointed turn. He keeps the suguha quiet and lets the jigane and the slant carry the work, and on the Kitaguchi katana the judges find in all of these points the characteristic features of this craftsman and his school[[c:3]].
The jigane shows the Bitchū steel at full strength. A ko-itame mixed with mokume tightens into the so-called chirimen-hada, the crêpe-like surface texture of the school, and through it run the patchy jifu and the clear sumihada patches that are among Aoe's surest tells. On the tantō the forging packs down finely, thick ji-nie gathers, and a faint midare-utsuri rises across it; on the unsigned katana the grain stands more openly, with sumihada mixed in and a rather coarse nie on the edge. The temper on the Gentoku tantō is carried down into the ha-machi, a yakikomi the judges single out, and the bright, clear sharpness of its nioiguchi is what they note above all, the hardened edge keeping its line tight and luminous[[c:4]]. The bōshi runs straight or with a shallow notare and turns back in a ko-maru or, more characteristically, with the tip drawn to a point.
His surviving work falls into two registers by form. The signed and dated pieces are the documentary core: the Gentoku 1 tantō headed by the Sahyōe-no-jō title, ubu with the long mei cut by a slender chisel and the date on the reverse, and the wide-bodied katana signed "Bitchū no kuni jūnin Naotsugu saku," their long signatures preserved through shortening by being folded back into an orikaeshi-mei. The published sources note that among his works the signatures including the Sahyōe-no-jō title are rare[[c:5]], the surviving examples of that type carrying dates of Gentoku, Shōkei and Kenmu, so the office title and the year together fix both the man and the moment. The second register is the shortened tachi attributed to him by sight, ō-suriage and mumei or with only a fragment of the province inscription left at the tang tip; here the faint, reverse-slanting ko-ashi on a standard chū-suguha are read as the well-expressed mark of Sue-Aoe, the attribution and the period alike judged secure. The Meikan reads a first and a second generation under the name, the second dated Ryakuō into Enbun, a two-generation theory the judges cite without forcing a division of the surviving blades.
What sets him apart within the school is stated in his own work rather than borrowed from a comparison. The published sources call one tantō a clear expression of the characteristics of the late-Kamakura Aoe school, Naotsugu in particular[[c:6]], and another the very type of the late-Kamakura suguha Aoe blade[[c:7]], the ko-maru bōshi and the steep ō-sujikai filing named as the school's own viewing points. His chū-suguha with its quiet reverse slant stands just before the school's Nanbokuchō peak, where the suguha turns to nioi-deki and the characteristic saka-chōji-midare appears; his manner is the standard Sue-Aoe work that the peak would carry further. On the unsigned katana attributed to him the judges find the jigane good and the workmanship good[[c:8]], allowing only that the nioiguchi shows a slight cloudiness, and they note that the former tachi silhouette and the workmanship make both the period assessment and the attribution untroubled. The bare two-character mei and the ō-sujikai file marks of the Niigata tantō are called typical, the signature characters and the filing alike following the established conventions of the school[[c:9]].
The record that survives him is small and almost wholly in the designated tiers. Five of his blades carry an official designation, two of them Tokubetsu-Jūyō and three Jūyō, and Fujishiro rates him Jō-saku; the published sources praise the quality of execution repeatedly, the Kitaguchi katana judged thoroughly healthy in both ji and ha[[c:10]] and the Tokubetsu-Jūyō katana a piece that clearly expresses the style of the Aoe school of this period, of particularly excellent workmanship[[c:11]]. No National Treasure or Important Cultural Property stands among them, and his blades carry no recorded provenance in the daimyō houses, so what a collector may realistically encounter is one of the Tokubetsu-Jūyō or Jūyō pieces: a signed and dated tantō in which the late-Kamakura Aoe manner is set down whole, or a shortened katana whose folded-back signature still names the smith. They come to light only from time to time, and a signed and dated example, ubu and clear in both its characters and its file marks, is the kind of thing the published sources themselves treat as material of high documentary value.
Hidetsugu (秀次) — Mainline · 1312-1317. Tokujū, Jūyō. Saemon no Jo Hidetsugu was a swordsmith of the Aoe school active in Bitchu Province during the late Kamakura period, with dated works bearing era names such as Kagen, Enkyo, and Showa. Sword reference compendia record him as signing "Bitchu no Kuni Manju no Sho ju Saemon no Jo," and note that the name Hideji was transmitted in successive generations — one tradition holding that Hideji was a son of Tsugatada, another that he was a son of Tsuguhide. The Aoe lineage, flourishing chiefly in the lower basin of the Takahashi River, inherited a reputation for Bitchu swords noted as early as the eleventh-century *Shin Sarugaki-ki*. Works up through roughly the mid-Kamakura period are classified as Ko-Aoe, while those thereafter through the Nanbokucho period are grouped broadly under the name Aoe.
In forging and hardening, works by this smith display the hallmarks of the mature Aoe tradition. The *kitae* shows tightly forged *ko-itame-hada* with extremely fine *ji-nie* and distinct *midare-utsuri* standing in the ground. The *hamon* is fundamentally *suguha*, mixed with *gunome*, angular elements, *ko-choji*, and *ko-gunome*; *ashi* and *yo* enter abundantly, with *saka-ashi* interspersed and *ko-nie* attaching. Fine *kinsuji* and *sunagashi* run through the temper, and the *nioiguchi* is bright and clear. In certain works the *nie* presence becomes calmer and the *nioiguchi* tightens, reflecting the stylistic transition from the late Kamakura into the Nanbokucho period that characterizes this school's later output.
Extant signed works by smiths bearing the Saemon no Jo title within the Hideji line are rarely encountered, and those that survive in *ubu* condition with dated inscriptions hold particular documentary value. The *kaki-kudashi* style of date inscription seen on certain examples is a feature observed within the broader Aoe group and represents precious evidence for research into both the individual smith and the school. These blades demonstrate a markedly superior workmanship that plainly reveals the high technical level of Saemon no Jo Hidetsugu, and they serve as important reference material for the study of Bitchu Province sword production in the late Kamakura period.
Sadatsugu (貞次) — Mainline · 1334-1338. Tokujū, Jūyō. Sadatsugu is one of the most celebrated names of the Aoe school of Bitchu Province. Transmitted since the *Kanchiin-bon Meizukushi* as a smith selected among the *ban-kaji* appointed to serve Retired Emperor Go-Toba, Sadatsugu is accorded the highest valuation in the *Shinkan Hiden-sho*, recorded as "Bitchu objects, supreme: fifteen *kan*,"[[c:1]] and has thus long been regarded as first rank even among Aoe works. The name was carried on from the early Kamakura period through the Nanbokucho period, encompassing multiple generations. So great was the esteem attached to this lineage that the Hon'ami family developed a longstanding tendency, when encountering well-made unsigned Aoe works that display a typical manner and particularly fine workmanship, to render Sadatsugu appraisals in the sense of denoting an Aoe piece of superior quality.
The technical character of works attributed to Sadatsugu is firmly rooted in the Aoe idiom of the late Kamakura period. The forging presents *itame-hada* mixed with *mokume* in which the grain stands out finely; extremely fine *ji-nie* adheres, and vivid *midare-utsuri* appears conspicuously. The *hamon* is fundamentally *suguha*, mixed with *choji*, *ko-choji*, *ko-gunome*, and small *gunome*; a distinctive tendency toward *saka-ashi* can be observed throughout. In the lower half of the blade, the temper characteristically becomes irregular and lively, with *ashi* and *yo* entering vigorously, *nioi* predominating with *ko-nie*, and fine *kinsuji* and *sunagashi* running through a *nioiguchi* that is bright and clear. The *boshi* typically shows a shallow *notare* with an upward-tending rise, becoming pointed at the tip with a rather long *kaeri*, revealing a distinctive workmanship.
The scholarly significance of Sadatsugu attributions lies in their role as markers of the highest quality within the Aoe tradition. The NBTHK has repeatedly observed that the *jihada*, *hamon*, and *boshi* of these works "conspicuously manifest the distinctive characteristics of the Aoe group in the late Kamakura period," and that the reverse-slanting tendencies visible in the *yakiba* call to mind a precursor to the brilliant *saka-choji midare* that flourished in the subsequent Nanbokucho period. The internal scenery of the temper displays variety; the *nioiguchi* is bright and clear; and, combined with the robust form featuring thick *kasane* and abundant *nikuoki*, these works are consistently recognized as representative superior exemplars of the school.
Sadatsugu (貞次) — Mainline · 1319-1321. Tokujū, Jūyō. Sadatsugu (貞次) of the Bitchu Aoe school is one of the most historically revered names in the Japanese sword tradition. Ko-Aoe Sadatsugu has been transmitted since the *Kanchiin-bon Meizukushi* as a master selected among the smiths appointed to forge in attendance upon Retired Emperor Gotoba. In the *Shinkan Hiden-sho* he is accorded the highest valuation -- "Bitchu workmanship, supreme: fifteen *kan*" -- and thus has long been regarded as a foremost figure even among Aoe works. The name Sadatsugu was carried on through successive generations into the Nanbokucho period; the later Uemon Taro Sadatsugu, recorded as the son of Suketsugu, left dated works from the Karyaku, Gentoku, and Genko eras, though surviving examples by this smith are exceedingly rare.
Works attributed to Sadatsugu display the distinctive hallmarks of the late-Kamakura Aoe school. The forging typically presents *itame-hada* mixed with *mokume*, in which the grain stands out to produce a *chirimen-hada* (crepe-like) texture. Minute *ji-nie* adheres densely, fine *chikei* enter, and *midare-utsuri* rises prominently. The *hamon* takes *suguha* as its foundation, incorporating *ko-choji*, *ko-gunome*, and small *midare*-like elements, with *ashi* and *yo* appearing throughout. The temper is *nioi*-dominant with *ko-nie*, and fine *kinsuji* and *sunagashi* run well, yielding a *nioiguchi* that is bright and clear. In certain works a reverse-running tendency (*gyaku-gakari*) emerges in the lower half, prefiguring the flamboyant *gyaku-choji midare* of the subsequent Nanbokucho period.
Sadatsugu's significance extends beyond his personal accomplishment. From old times there has been a tendency to ascribe to Sadatsugu those unsigned Aoe blades that display a typical manner and are of particularly fine workmanship, making the name a benchmark for quality within the school. The imposing *sugata* seen in signed examples -- wide *mihaba* with little taper, *o-kissaki*, and pronounced *funbari* -- is chronologically noteworthy for anticipating forms more commonly associated with the Nanbokucho era. As both a historical figure of the highest rank and a touchstone for Aoe excellence, Sadatsugu remains indispensable to the study of the Bitchu sword-making tradition.
Suketsugu (助次) — Mainline · 1312-1318. Tokujū, Jūyō. Suketsugu is traditionally said to have been the son of Ko-Aoe Toshitsugu, and the succession of this name extends across a broad span from the early Kamakura period through the Nanbokucho period. According to reference works on signatures, there were at least three generations of smiths using the name, with activity recorded across the eras of Jokyu, Showa, Enbun, Eitoku, and Oei. The smith of the late Kamakura period, active around Showa 1 (1312), is identified as belonging to Naka-Aoe and is the most prominently represented in designated works. His signed pieces bear long inscriptions cut with a thick chisel in large, boldly formed characters, sometimes including the place-name designation "Ko'i Toshosho" and the notation "resident of Senoo," establishing that the Senoo smiths and the Aoe smiths, once thought distinct, had by the Kamakura period merged into a single tradition centered in the lower basin of the Takahashi River.
The technical hallmarks of Suketsugu's work are firmly grounded in the Aoe school's characteristic idiom. The forging presents *itame-hada* mixed with *mokume*, sometimes tending toward *nagare-gokoro*, with the grain standing out; fine *ji-nie* adheres densely, *chikei* appear, and *utsuri* emerges in forms ranging from faint streaks to *jifu-utsuri*. The *hamon* is *suguha*-based with a shallow *notare* tone, mixed with *ko-gunome*, *saka-choji*, and pointed *togari-gunome*; *saka-ashi* and *yo* enter, and *ko-nie* adheres well with *sunagashi* running through. The *boshi* is typically straight, turning back in *ko-maru* or *o-maru*, sometimes with *hakikake*. In certain works the *kasane* is rather thick and the construction bold and powerful, while later-period examples show the *chu-suguha* with reversed-slant *ko-ashi* that clearly exhibits the style of Sue-Aoe.
Works by Suketsugu occupy a position of particular documentary and scholarly importance within the Aoe tradition. The Showa 1 date appearing on multiple pieces represents the earliest known date among extant Aoe-made swords, and the long inscriptions, including the "Gyobu no Jo" title and age inscription on the Bunpo 2 (1318) tanto, constitute invaluable source material for the study of medieval Bitchu swordsmithing. The NBTHK has noted that although individual pieces may show a slight suggestion of *tsukare* in the *ji*, the works overall preserve an archaic and elegant taste while clearly expressing the characteristic features of Aoe workmanship, presenting a representative archetype of Aoe production of this period.
Tsunetsugu (恒次) — Mainline · 1310-1347. Tokujū, Jūyō. Tsunetsugu is one of the representative lineage names of the Aoe school of Bitchu Province, a tradition whose renown was already attested in the early eleventh-century compendium *Shin Sarugaki-ki*, which counted "the swords of Bitchu" among the notable products of the provinces. The earliest and most celebrated bearer of the name is the Ko-Aoe Tsunetsugu traditionally identified as one of Retired Emperor Go-Toba's *goban-kaji* — appointed swordsmiths of the highest standing — and recorded as a son of Ko-Aoe Moritsugu. From this distinguished origin the name was inherited across a long span, from the early Kamakura period through the Nanbokucho era, with multiple generations active in the Aoe heartland along the lower reaches of the Takahashi River. One later bearer, Saemon no Jo Tsunetsugu, is documented as residing at Manjusho in Bitchu and inscribed blades with his official title alongside a Enkyo 3 (1310) date, constituting valuable reference material for the school's chronology.
The technical character of late-Kamakura Tsunetsugu work is firmly established in NBTHK appraisals. The forging (*kitae*) shows compact *ko-itame* mixed with *ko-mokume*, the grain standing finely to produce a *chirimen-hada* — the distinctive crepe-like texture — with *jifu*-like tonal areas intermixed and fine *ji-nie* adhering closely. A hallmark of the school is the appearance of *utsuri* in various modes: reverse-leaning *midare-utsuri* in darker bands, mottled *jifu-utsuri*, and the distinctive *dan-utsuri* in which *sugu-utsuri* stands near the edge while *midare-utsuri* appears toward the *shinogi*. The *hamon* is fundamentally *chu-suguha*, into which *ko-gunome*, *gunome*, and reverse-slanting elements are mixed; *saka-ashi* — the so-called *nezumi-ashi* — enter plentifully alongside *ashi* and *yo*. The *nioiguchi* tends toward *shimarigokoro*, a tightened quality, yet remains bright and clear, with *nioi* predominating and *ko-nie* adhering.
NBTHK assessors consistently characterize Tsunetsugu's oeuvre as manifesting, without reservation, the aesthetic strengths and points of interest characteristic of bright, clear Aoe work. Compared with contemporary Bizen productions, these blades present a quieter, more restrained and astringent character. Appraisals recurrently note ample *nikuoki* — excellent retention of flesh — conferring a substantial and forceful presence, and praise the dense, precise forging and the sound condition of both *ji* and *ha* as hallmarks of robust and stalwart workmanship. In these qualities the Tsunetsugu lineage stands as a pillar of the Aoe tradition at its late-Kamakura zenith.
Yoshitsugu (吉次) — Mainline · 1345-1350. Tokujū. Yoshitsugu was a smith of the Aoe school working in Bitchu Province, a region long renowned as a source of iron. Sword compendia record him as active around the Jowa era (1345--1350) of the Nanbokucho period, placing him within the mature phase of the school's development. The Aoe group is conventionally divided into two periods: works up to around the mid-Kamakura period are distinguished as Ko-Aoe, while those thereafter through the Nanbokucho period are broadly termed Aoe. The NBTHK notes, however, that appraisals assigning specific individual names to Aoe works "are subject to both approval and dissent," underscoring the difficulty of firm personal attribution within this prolific school.
The Aoe style exhibits two principal modes: one consists of *suguha* tempered with a tightly formed *nioiguchi*; the other is the distinctive *saka-choji-midare*, "whose characteristic form was brought to completion by around Enbun, during the high point of Nanbokucho swordmaking." Yoshitsugu's work reflects the first mode. His forging is a densely compacted *ko-itame-hada* with minute *ji-nie* and fine *chikei*. The *hamon* is fundamentally suguha, mixed with *gunome*, angular elements (*kaku-gakari*), and *ko-gunome*, at times showing a reverse tendency with *ko-ashi* and *yo*. The nioiguchi is tight, with *ko-nie*, and "bright and clear." A hallmark of his *jihada* is the vivid *midare-utsuri* that, near the edge, forms double and triple band-like layers known as *dan-utsuri*, accompanied by the dark mottled texture called *sumihada* -- features identified as "major highlights of this school." His blades present a wide *mihaba* with little taper, shallow *sori*, and an imposing *o-kissaki*; the *boshi* tends toward *tsukiage* with a pointed inclination.
Designated examples have been praised as "superlative" and "outstanding" among Aoe works, with the NBTHK further commending their *kenzen* -- sound and well-preserved -- condition. His output exemplifies the commanding, robust *taihai* associated with Aoe at its Nanbokucho-period zenith, and his blades remain touchstones for the school's tradition of tight forging and luminous temper.
Other smiths
Ietsugu (家次) — Mainline · 1356-1357. Ietsugu belonged to the Aoe school of Bitchu Province, a lineage whose activity spanned from the mid-Kamakura period through the late Nanbokucho era. He is recorded in the *Meikan* as a son of Moritsugu, and his works are appraised across two distinct periods: a tachi bearing a *tachi*-style signature is attributed to the Naka-Aoe group of the middle to late Kamakura period, while dated works inscribed Enbun 2 (1357) and Shitoku 3 (1386) place him firmly in the Nanbokucho era. This range suggests either a long working life or, more likely, successive generations operating under the same name.
The Naka-Aoe tachi displays the school's hallmark qualities: a dense *ko-itame-hada* with *ji-nie* and *utsuri* standing out, paired with a *suguha-cho* temper where the *nioiguchi* tends toward tightness with abundant *ko-ashi* and adhering *ko-nie*. The NBTHK notes that "the characteristic features of this lineage are well expressed in both the *jihada* and the *hamon*." The later tachi dated Shitoku 3 is especially significant, as signed works of the Aoe school from this period are described as "extremely rare — not only those by Ietsugu, but in general." Despite workmanship the NBTHK candidly assesses as not rising to a high level, the piece is valued as "exceedingly precious as documentary material."
What emerges from the designated corpus is an artisan of considerable documentary importance to the study of the Aoe tradition. His tanto dated Enbun 2 differs in form from the large, elongated examples of contemporaries such as Tsuguyoshi and Tsugunao, making it "useful for research on the Aoe school." Across his surviving works, Ietsugu preserves the essential vocabulary of Bitchu craftsmanship while documenting the school's evolution through its final active centuries.
Moritsugu (盛次) — Mainline · 1332-1334. Smith of the Bitchū Aoe School.
Sanenaga (眞長) — Mainline · 1308-1311. Smith of the Bitchū Aoe School.
Naganao (長直) — Mainline · 1288-1293. Smith of the Bitchū Aoe School.
Sanetsune (眞恒) — Mainline · 1303-1306. Smith of the Bitchū Aoe School.
Suetsugu (末次) — Mainline · 1288-1293. Smith of the Bitchū Aoe School.
Chikatsugu (親次) — Mainline · 1303-1306. Smith of the Bitchū Aoe School.
Chikatsugu (親次) — Mainline · 1331-1336. Smith of the Bitchū Aoe School.
Harutsugu (春次) — Mainline · 1352-1356. Smith of the Bitchū Aoe School.
Hisatsugu (久次) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Masatsugu (正次) — Mainline · 1338-1342. Smith of the Bitchū Aoe School.
Naganao (永直) — Mainline · 1293-1299. Smith of the Bitchū Aoe School.
Nagatsugu (長次) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Nagatsugu (長次) — Mainline · 1352-1356. Smith of the Bitchū Aoe School.
Nobutsugu (延次) — Mainline · 1331-1336. Smith of the Bitchū Aoe School.
Norimitsu (則光) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Suetsugu (末次) — Mainline · 1338-1342. Smith of the Bitchū Aoe School.
Suetsugu (末次) — Mainline · 1362-1368. Smith of the Bitchū Aoe School.
Suketsugu (助次) — Mainline · 1293-1299. Smith of the Bitchū Aoe School.
Sukeyoshi (助吉) — Mainline · 1338-1342. Smith of the Bitchū Aoe School.
Toshitsugu (俊次) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Tsuguhisa (次久) — Mainline · 1342-1345. Smith of the Bitchū Aoe School.
Tsuguyori (次頼) — Mainline · 1306-1308. Smith of the Bitchū Aoe School.
Tsuguyoshi (次吉) — Mainline · 1306-1308. Smith of the Bitchū Aoe School.
Tsunetsugu (恒次) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Yoritsugu (頼次) — Mainline · 1317-1319. Smith of the Bitchū Aoe School.
Yukizane (行眞) — Mainline · 1317-1319. Smith of the Bitchū Aoe School.
Arihiro (有弘) — Mainline · 1352-1356. Smith of the Bitchū Aoe School.
Arihiro (在弘) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Arinobu (有信) — Mainline · 1288-1293. Smith of the Bitchū Aoe School.
Arisue (有末) — Mainline · 1299-1302. Smith of the Bitchū Aoe School.
Aritsugu (有次) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Ariyuki (有行) — Mainline · 1345-1350. Smith of the Bitchū Aoe School.
Ariyuki (有行) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Chikanori (親則) — Mainline · 1324-1326. Smith of the Bitchū Aoe School.
Chikatsugu (近次) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Chikatsugu (近次) — Mainline · 1308-1311. Smith of the Bitchū Aoe School.
Chikayori (親依) — Mainline · 1361-1362. Smith of the Bitchū Aoe School.
Chikayori (近依) — Mainline · 1317-1319. Smith of the Bitchū Aoe School.
Haruhisa (春久) — Mainline · 1346-1370. Smith of the Bitchū Aoe School.
Harutsugu (玄次) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Harutsugu (春次) — Mainline · 1308-1311. Smith of the Bitchū Aoe School.
Hidetoshi (秀利) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Hisatsugu (久次) — Mainline · 1329-1331. Smith of the Bitchū Aoe School.
Hisatsugu (久次) — Mainline · 1317-1319. Smith of the Bitchū Aoe School.
Hisayoshi (久吉) — Mainline · 1303-1306. Smith of the Bitchū Aoe School.
Kagenaga (景長) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Kageshige (晩重) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Kageyoshi (景良) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Kanenaga (包永) — Mainline · 1321-1324. Smith of the Bitchū Aoe School.
Kanenaga (包永) — Mainline · 1342-1345. Smith of the Bitchū Aoe School.
Kanenobu (兼宣) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Kanetsugu (金次) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Kanetsugu (包次) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Kiyotsugu (清次) — Mainline · 1260-1261. Smith of the Bitchū Aoe School.
Koreshige (是重) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Koreshige (是重) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Kunimune (國宗) — Mainline · 1329-1331. Smith of the Bitchū Aoe School.
Mareto (希遠) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Masatsune (正恒) — Mainline · 1311-1312. Smith of the Bitchū Aoe School.
Masatsune (正恒) — Mainline · 1361-1362. Smith of the Bitchū Aoe School.
Moritsugu (守次) — Mainline · 1308-1311. Smith of the Bitchū Aoe School.
Moritsugu (守次) — Mainline · 1345-1350. Smith of the Bitchū Aoe School.
Moritsune (守恒) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Morotsugu (師次) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Morotsugu (師次) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Munesada (宗貞) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Munesue (宗末) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Munetsugu (宗次) — Mainline · 1324-1326. Smith of the Bitchū Aoe School.
Munetsugu (宗次) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Munetsune (宗恒) — Mainline · 1293-1299. Smith of the Bitchū Aoe School.
Nagahisa (長久) — Mainline · 1352-1356. Smith of the Bitchū Aoe School.
Nagamitsu (永光) — Mainline · 1345-1350. Smith of the Bitchū Aoe School.
Nagatsugu (長次) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Nagatsugu (永次) — Mainline · 1324-1326. Smith of the Bitchū Aoe School.
Naonaga (直長) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Naonobu (直信) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Naonobu (直信) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Nariie (成家) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Nariie (成家) — Mainline · 1331-1336. Smith of the Bitchū Aoe School.
Naritaka (業高) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Naritsuna (成綱) — Mainline · 1319-1321. Smith of the Bitchū Aoe School.
Nobukuni (信國) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Nobusada (延貞) — Mainline · 1345-1350. Smith of the Bitchū Aoe School.
Nobutsugu (信次) — Mainline · 1321-1324. Smith of the Bitchū Aoe School.
Nobutsugu (信次) — Mainline · 1293-1299. Smith of the Bitchū Aoe School.
Nobutsugu (信次) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Sadatsugu (貞次) — Mainline · 1326-1329. Ko-Aoe Sadatsugu (青江貞次) has been transmitted since the *Kanchiin-bon Meizukushi* as a celebrated master said to have been selected among the smiths in attendance upon Retired Emperor Go-Toba. The *Shinkan Hiden-sho* accords him the very highest valuation -- "Bicchu objects, supreme: fifteen *kan*" -- and thus from antiquity he has been regarded as first rank even among Aoe works. The same name continued to be carried on down into the Nanbokucho period; perhaps for this reason, from old times the Hon'ami family shows a tendency, in the case of unsigned Aoe works, to render Sadatsugu appraisals for pieces that display a typical manner and are of particularly fine workmanship.
The works attributed to Sadatsugu exhibit a forging of *itame-hada* mixed with *mokume*, in which the grain stands out finely; *ji-nie* adheres in extremely fine particles, and vivid *midare-utsuri* is clearly visible. The *hamon* is fundamentally *suguha*, mixed with *choji*, *ko-choji*, and *ko-gunome*; in the lower half the temper becomes especially irregular and lively, with *ashi* and *yo* entering vigorously. *Nioi* predominates with *ko-nie*; fine *kinsuji* and *sunagashi* run through; and the *nioiguchi* is bright and clear. In certain examples, a tightly forged *ko-itame* with *dan-utsuri* appears, and the suguha shows a tight nioiguchi mixing *saka-ashi*. The *boshi* characteristically shows a shallow *notare* that tends to rise upward and become pointed, with a rather long *kaeri* -- features that together reveal the workmanship style. A reverse-slanting tendency observed in the *yakiba*, and the increasingly lively irregularity in the lower half, call to mind a precursor to the brilliant *saka-choji midare* of the subsequent Nanbokucho period.
The blades attributed to Sadatsugu conspicuously manifest the distinctive characteristics of the Aoe group in the late Kamakura period. They typically retain thick *kasane* with abundant *hiraniku* and robust form, even when greatly shortened. The internal scenery of the temper displays variety; the nioiguchi is bright and clear; and the jihada, hamon, and boshi described above collectively represent "a superior exemplar of that school" -- the standard by which the Hon'ami Sadatsugu attribution has been conferred for generations.
Sadatsugu (貞次) — Mainline · 1293-1299. Smith of the Bitchū Aoe School.
Sadatsugu (貞次) — Mainline · 1345-1350. Smith of the Bitchū Aoe School.
Saia (西阿) — Mainline · 1288-1333. Smith of the Bitchū Aoe School.
Sanesada (眞貞) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Shigetsugu (重次) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Shigetsugu (重次) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Sueyoshi (末吉) — Mainline · 1352-1356. Smith of the Bitchū Aoe School.
Sukechika (助近) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Sukechika (助近) — Mainline · 1332-1334. Smith of the Bitchū Aoe School.
Sukenobu (助延) — Mainline · 1362-1368. Smith of the Bitchū Aoe School.
Suketane (助植) — Mainline · 1317-1319. Smith of the Bitchū Aoe School.
Tadatsugu (忠次) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Tadatsugu (忠次) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Tamenaga (爲長) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Tameto (爲遠) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Tameuji (爲氏) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Tameyasu (爲康) — Mainline · 1288-1293. Smith of the Bitchū Aoe School.
Tameyoshi (爲吉) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Tokitsugu (時次) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Tokitsugu (時次) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Tokizane (時眞) — Mainline · 1303-1306. Smith of the Bitchū Aoe School.
Tokizane (時眞) — Mainline · 1362-1368. Smith of the Bitchū Aoe School.
Tomotsugu (友次) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Tomotsugu (友次) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Tomotsugu (朝次) — Mainline · 1338-1342. Smith of the Bitchū Aoe School.
Toshitsugu (利次) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Toshitsugu (利次) — Mainline · 1362-1368. Smith of the Bitchū Aoe School.
Toshitsugu (年次) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Toshitsugu (俊次) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Totsugu (遠次) — Mainline · 1288-1293. Smith of the Bitchū Aoe School.
Tsuguhide (次秀) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Tsuguhide (次秀) — Mainline · 1299-1302. Smith of the Bitchū Aoe School.
Tsuguhide (次秀) — Mainline · 1362-1368. Smith of the Bitchū Aoe School.
Tsuguhiro (次弘) — Mainline · 1308-1311. Smith of the Bitchū Aoe School.
Tsuguhiro (次弘) — Mainline · 1342-1345. Smith of the Bitchū Aoe School.
Tsuguhiro (次廣) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Tsugumasa (次正) — Mainline · 1362-1368. Smith of the Bitchū Aoe School.
Tsugunao (次直) — Mainline · 1293-1299. Smith of the Bitchū Aoe School.
Tsugusada (次定) — Mainline · 1317-1319. Smith of the Bitchū Aoe School.
Tsugusue (次末) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Tsugusuke (次助) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Tsugutane (次植) — Mainline · 1288-1293. Smith of the Bitchū Aoe School.
Tsugutane (次植) — Mainline · 1326-1329. Smith of the Bitchū Aoe School.
Tsugutoshi (次利) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Tsugutsune (次恒) — Mainline · 1324-1326. Smith of the Bitchū Aoe School.
Tsugutsune (次恒) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Tsuguyori (次依) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Tsuguyuki (次行) — Mainline · 1326-1329. Smith of the Bitchū Aoe School.
Tsune (恒) — Mainline · 1261-1264. Smith of the Bitchū Aoe School.
Tsuneie (恒家) — Mainline · 1331-1336. Smith of the Bitchū Aoe School.
Tsunenaga (恒永) — Mainline · 1317-1319. Smith of the Bitchū Aoe School.
Tsunenori (恒則) — Mainline · 1293-1299. Smith of the Bitchū Aoe School.
Tsunesue (恒末) — Mainline · 1331-1336. Smith of the Bitchū Aoe School.
Tsunetsugu (恒次) — Mainline · 1350-1352. Smith of the Bitchū Aoe School.
Tsunetsugu (恒次) — Mainline · 1312-1317. Tsunetsugu of the Bitchu Aoe group stands among the most enduring names in the school's history. The most celebrated bearer of this name is the Ko-Aoe Tsunetsugu, famed as one of the *goban kaji* appointed by Emperor Go-Toba, and the name was inherited continuously from the early Kamakura period into the Nanbokucho era. Within the Aoe lineage, smiths descending from Masatsune as progenitor signed in *tachi-mei* fashion, while the line of Sadaji and related smiths characteristically cut their signatures on the *hakiura*. The later Aoe smiths bearing the title "Saemon no Jo" represent a distinct branch, as evidenced by extant works with Gen'toku-era dates.
The Juyo setsumei describe a forging style grounded in tightly packed *ko-itame-hada*, with *mokume* and *sumi-hada* mixed in, and fine *ji-nie* adhering closely. *Utsuri* appears in varied forms: *nie-utsuri*, *midare-fu* patterning toward the *mune*, and the distinctive *dan-utsuri* -- a linear form standing out toward the edge that is a recognized hallmark of late Kamakura Aoe work. The *hamon* is typically *suguha*-based with *ko-gunome* or *ko-midare* mixed in; the *nioiguchi* tends toward *shimarigokoro*, tight yet bright and clear, with fine *nie-suji* and *sunagashi* appearing. One work (Juyo 46) is praised as possessing ample *nikuoki* with a *nioiguchi* that is "bright and clear, with finely active *ashi* and *yo*," and is singled out as "a superior example among works appraised as Tsunetsugu." File marks are characteristically *o-sujikai*, and the signature placement toward the *mune* side conforms to the conventions of the later Aoe group.
With works spanning from the mid-Kamakura through late Kamakura period, the Tsunetsugu name encompasses several generations of accomplished Aoe smiths whose tight, *nie*-laden forging and restrained *suguha* tempering represent the Bitchu tradition at its most refined.
Tsuneyasu (恒康) — Mainline · 1319-1321. Smith of the Bitchū Aoe School.
Tsunezane (恒眞) — Mainline · 1293-1299. Smith of the Bitchū Aoe School.
Tsunezane (恒眞) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Yasuhiro (安弘) — Mainline · 1264-1275. Smith of the Bitchū Aoe School.
Yasuhiro (安弘) — Mainline · 1317-1319. Smith of the Bitchū Aoe School.
Yasuhiro (安弘) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Yasuie (安家) — Mainline · 1352-1356. Smith of the Bitchū Aoe School.
Yasuie (安家) — Mainline · 1293-1299. Smith of the Bitchū Aoe School.
Yasutsugu (康次) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Yasutsugu (安次) — Mainline · 1312-1317. Smith of the Bitchū Aoe School.
Yasutsugu (康次) — Mainline · 1299-1302. Smith of the Bitchū Aoe School.
Yoritsugu (依次) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Yoritsugu (依次) — Mainline · 1311-1312. Smith of the Bitchū Aoe School.
Yoshifusa (吉房) — Mainline · 1368-1375. Smith of the Bitchū Aoe School.
Yukinobu (行信) — Mainline · 1362-1368. Smith of the Bitchū Aoe School.
Yukinobu (行信) — Mainline · 1334-1338. Smith of the Bitchū Aoe School.
Yukitoshi (行利) — Mainline · 1278-1288. Smith of the Bitchū Aoe School.
Yukitsugu (行次) — Mainline · 1249-1256. Smith of the Bitchū Aoe School.
Yukitsugu (行次) — Mainline · 1303-1306. Smith of the Bitchū Aoe School.
Yukitsugu (幸次) — Mainline · 1311-1312. Smith of the Bitchū Aoe School.
Yukiyasu (行安) — Mainline · 1356-1361. Smith of the Bitchū Aoe School.
Yukiyasu (行安) — Mainline · 1345-1350. Smith of the Bitchū Aoe School.
Yukizane (行眞) — Mainline · 1275-1278. Smith of the Bitchū Aoe School.
Yukizane (行眞) — Mainline · 1362-1368. Smith of the Bitchū Aoe School.
Phase 3 · Sue-Aoe (末青江) · 1334 – 1500
Sue-Aoe names the closing chapter of the Bitchū tradition, the work made after the Aoe smiths reached the height of their powers in the Nanbokuchō era and then carried the lineage forward into Muromachi decline. The window is anchored by the hands the NBTHK repeatedly groups together as the representative smiths of the period: Tsuguyoshi (次吉), Tsugunao or Tsuginao (次直), and Moritsugu (守次), with Naotsugu (直次), Yoshitsugu (吉次), and a Sadatsugu (貞次) name carried down from the late Kamakura masters into this later age. Dated blades fix the chronology firmly, from a Moritsugu tantō of Enbun 3 (1358) and a Naotsugu in the Ryakuō years through Tsuguyoshi pieces of Teiji 2 (1363) and Kōan 2 (1362). These men succeeded the late-Kamakura-into-early-Nanbokuchō generation that produced Sadatsugu and the earlier Moritsugu, and they worked at the moment the Southern Court's fortunes were turning, after which the school thinned out. The very tail of the line surfaces in obscure later Bitchū hands such as Munesada and Sōtei of Kasaoka, dated Bunmei 13 (1481), whose lineage the records leave unknown and whose work the setsumei describe as nearly indistinguishable from late Bizen.
Sugata is the first tell. Setsumei after setsumei records a wide *mihaba* with little taper from base to tip, thin *kasane*, *sun-nobi* proportion in the tantō and an extended *chū-kissaki* or outright *ō-kissaki* in the larger blades, the broad Nanbokuchō build that the earlier Aoe never carried. The *jihada* keeps the school signature of *ko-itame* mixed with *mokume*, finely standing, with mottled *jifu* and patches of *sumihada* drifting through the steel. Above all the period is read in its *utsuri*: streak-like *suji-utsuri* rises near the edge and stacks into the layered *dan-utsuri* the catalogues prize, seen plainly on the Tsugiyoshi tachi of Tokuju 21 and the dated Tsuguyoshi tantō of Juyo 58. Two tempers divide the leading hands. Tsuguyoshi favors a tight, bright *suguha* with *ko-ashi* and *saka-ashi*; Tsugunao favors the flamboyant *saka-chōji-midare* with its reverse slant, *ashi* and *yō* pouring in, that matured around Enbun. Against this the Ko-Aoe of the mid-Kamakura ran *ko-nie-deki* with a subdued, *shizumi* *nioiguchi* over a refined *chirimen-hada*, while the late-Kamakura Chū-Aoe of Sadatsugu and Moritsugu stood between, the *nie* growing calmer and the reverse-slanting *yakiba* only beginning to foreshadow the later drama. Crucially the period remained *nioi-deki* where other provinces took up Sōshū *nie*, a holding distinction the setsumei mark out by name.
For kantei the cluster reads together. A broad Nanbokuchō sugata, *dan-utsuri* over *sumihada*, *ō-sujikai* file marks on the tang, and a *nioiguchi* that is tight and clear point to this window rather than to Bizen of the same age; the choice between bright *suguha* and reverse *saka-chōji* then separates Tsuguyoshi from Tsugunao, while Naotsugu's forceful reverse-chisel *mei* and *nezumi-ashi*, and Moritsugu's *kinsuji* in a tight *suguha*, mark their own hands. The named masters carry strong provenance: a Tsugiyoshi wakizashi dated Enbun 2 descended in the Maeda family, a Yoshitsugu tantō passed to the Sakai of Himeji by gift of Tokugawa Ietsuna, and an *ō-suriage* *den* Tsuguyoshi katana ran through the Yanagisawa house with Hon'ami origami from Mitsuatsu. Honma's own remark singling out Tsugiyoshi and Tsuginao as the makers of the clearest *chōji* in tantō fixes their standing at the close of the Aoe story.
Tsuguyoshi (次吉) — Mainline · 1357-1368. Jūbi, Tokujū, Jūyō. The early eleventh-century travel-text *Shin Sarugakki*, listing the famous products of the provinces, already names "the swords of Bitchū," and it was the Aoe smiths, flourishing along the lower reaches of the Takahashi River, who inherited that reputation. Tsuguyoshi works at the Nanbokuchō height of the line, and the published sources count him, together with Tsugunao and Moritsugu, among the representative Aoe smiths of the mid-fourteenth century. His dated, signed blades run across the Enbun, Jōji and Kōan years of the 1350s and 1360s, almost all of them *tantō* and *sun-nobi* wakizashi: wide in body, thin in *kasane*, shallow in *sori*, the period shape stated without ornament. Several are still *ubu*, carrying a long signature on the *omote* and a date on the reverse, so his hand can be followed year by year.
His manner is the one the published sources draw most carefully, because it divides cleanly in two. He works in a tight, bright *suguha* and in a flamboyant *saka-chōji-midare*, and the judges return again and again to the same distinction between the two Aoe masters: "as a rule Tsuguyoshi runs to *suguha*, Tsugunao to *saka-chōji-midare*,[[c:1]]" while in either temper the *nioiguchi* is tight and clear. The *suguha* is by far his own register. On these blades he tempers a *chū-suguha* or a narrow *hoso-suguha*, in places a shallow *notare*, into which small *ko-ashi*, *yō* and a reversed *saka-ashi* tendency enter, the temper *nioi*-dominant with *ko-nie*, fine *kinsuji* running within, the *nioiguchi* tight and notably bright. It is this clarity that the published sources name his and the school's chief point of appreciation, the *nioiguchi* that "is tight, and bright and clear.[[c:2]]"
The *jigane* carries the rest of the Aoe signature. Over a well-packed *ko-itame*, at times mixed with *ko-mokume* and standing a little, lie fine *ji-nie* set in minute density and delicate *chikei*, with the speckled *ji-madara* the sources also call *chirimen-hada* and patches of clear *sumihada*. A *midare-utsuri* stands toward the *mune*, and on his finest blades a further linear *utsuri* runs along the edge so that the two layer into a banded *dan-utsuri*, the steel left clear. The *bōshi* runs straight to a *ko-maru*, frequently with a pointed turn, sometimes with a long *kaeri* or a little *hakikake*; and the tang is filed, by the school's rule, in *ō-sujikai*. On one Kōan *tantō* the judges single out a *kaeri* "boldly tempered down deep to the *machi*,[[c:3]]" an unusual flourish in a *suguha* work that they hold sharpens rather than coarsens the blade.
The second register is the rarer face. On a small number of pieces the temper opens into a showy *saka-chōji-midare* mixed with *gunome*, the *ashi* reversed and *yō* entering, *nioi*-dominant with *ko-nie* and fine *kinsuji*, the *bōshi* entering as *midare* and turning with a pointed flavor; the *midare-utsuri* on the same blades stands conspicuously. The judges call one such *wakizashi* a representative work whose *saka-chōji* and *utsuri* together show the school plainly, and on a dated *tantō* of this kind they record an oral remark of Honma's that, within this Nanbokuchō line, "the smith who tempers the clove pattern in a *tantō* with the clearest *nioiguchi* is this craftsman, or else Tsugunao.[[c:4]]" Beyond the signed work stands a third record, the *ō-suriage mumei* katana attributed to him, a wide blade of imposing shape that keeps a 1657 Hon'ami origami naming Tsuguyoshi; its *itame* *jigane* with emerging *jifu* and its *nioi*-deki *suguha* with *saka-ashi* let the judges affirm it as his from the *jihada* and *hamon* rather than from any personal tell.
What sets Tsuguyoshi apart within his own school is exactly this balance. Against Tsugunao, whose hand leans to the brilliant reverse clove pattern, his work is read as the *suguha* master of the pair, the *nioiguchi* tight and bright on both their hands but the quiet temper his by preference. Against the earlier Ko-Aoe, whose *suguha* the published sources describe as *ko-nie-deki* with a somewhat subdued *nioiguchi*, his is the Nanbokuchō clarity, the line tightened and brightened. The judges call the *suguha* his family specialty, the manner in which "he displays his true capabilities," and name his best blades the outstanding examples among his surviving work.
For the collector he is a Nanbokuchō name of real standing rather than a rarity beyond reach. Fujishiro grades him Jō-jō saku. He has no National Treasures and no Important Cultural Properties; his record runs instead through the modern designations, fourteen of his blades falling in the Tokubetsu Jūyō and Jūyō tiers, two of them at Tokubetsu Jūyō. The published sources prize his *ubu*, dated, signed pieces as reference material for the study of the smith, and name one Tokubetsu Jūyō wakizashi outstanding among his works. His provenance runs through the daimyō houses: a Tokubetsu Jūyō wakizashi transmitted in the Maeda family with a black-lacquer *aikuchi koshirae* bearing eight gold *umebachi* crests, a *tantō* held in the Kan'in-no-miya princely house with its Hon'ami origami and crested storage box, and further blades recorded with the Maeda and Arima families. A signed Tsuguyoshi is not often offered, and most designated examples are held rather than traded, but a Jūyō tantō or wakizashi of his does appear from time to time, and a dated, signed one is among the more knowable things a collector of Bitchū Aoe could hope to encounter.
Munesada (宗貞) — Mainline · 1469-1487. Smith of the Bitchū Aoe School.
Hiratada (平忠) — Mainline · 1352-1368. Jūbun. Smith of the Bitchū Aoe School.
Ietsugu (家次) — Mainline · 1367-1386. Jūbun, Jūyō. Smith of the Bitchū Aoe School.
Nagatsugu (長次) — Mainline · 1394-1428. Jūyō. Smith of the Bitchū Aoe School.
Sadatsugu (貞次) — Mainline · 1380-1394. Jūyō. Smith of the Bitchū Aoe School.
Other smiths
Kagetsugu (景次) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Kunitsugu (国次) — Mainline · 1394-1466. Smith of the Bitchū Aoe School.
Yoshitsugu (吉次) — Mainline · 1380-1428. Smith of the Bitchū Aoe School.
Arihiro (有弘) — Mainline · 1381-1384. Smith of the Bitchū Aoe School.
Arisue (有末) — Mainline · 1489-1492. Smith of the Bitchū Aoe School.
Ariyuki (有行) — Mainline · 1384-1387. Smith of the Bitchū Aoe School.
Hisatsugu (久次) — Mainline · 1381-1384. Smith of the Bitchū Aoe School.
Kagenaga (景長) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Kageshige (晩重) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Kageshige (景重) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Kagetsugu (景次) — Mainline · 1379-1381. Smith of the Bitchū Aoe School.
Koreshige (是重) — Mainline · 1460-1466. Smith of the Bitchū Aoe School.
Moritsugu (盛次) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Munesada (宗貞) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Munetsugu (宗次) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Naosada (直貞) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Naotsugu (直次) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Nobusada (延貞) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Nobusada (延貞) — Mainline · 1375-1379. Smith of the Bitchū Aoe School.
Noritaka (則高) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Sanesada (眞貞) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Sukenari (助成) — Mainline · 1460-1466. Smith of the Bitchū Aoe School.
Takasue (高末) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tamekiyo (爲清) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Tametsune (爲恒) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Toshitsugu (年次) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Tsuguchika (次近) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tsuguie (次家) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Tsugunari (次成) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Tsugusada (次貞) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Tsugutoshi (次利) — Mainline · 1379-1381. Smith of the Bitchū Aoe School.
Tsunekiyo (恒清) — Mainline · 1381-1384. Smith of the Bitchū Aoe School.
Tsunetsugu (常次) — Mainline · 1428-1429. Smith of the Bitchū Aoe School.
Tsunetsugu (恒次) — Mainline · 1394-1428. Smith of the Bitchū Aoe School.
Yoshimura (吉村) — Mainline · 987-1596. Smith of the Bitchū Aoe School.
Yoshitsugu (吉次) — Mainline · 1441-1444. Smith of the Bitchū Aoe School.
Yukiyasu (行安) — Mainline · 1429-1441. Smith of the Bitchū Aoe School.