The The Chikuzen Kongōbyōe School (金剛兵衛), active 1200–1600 in Chikuzen Province across 28 documented smiths: 0 Kokuhō (National Treasures), 0 Jūbun, 1 Jūbi, 1 Tokubetsu Jūyō, 25 Jūyō.
Phase 1 · Ko-Kongobyoe (古金剛兵衛) · 1200 – 1393
During the Nanbokuchō period two groups of smiths worked in Chikuzen Province: the *Samonji* line and the Kongōbyōe line, named for the temple-associated smiths from whom the lineage descends. The setsumei trace the line to the *shodai* Kongōbyōe Moritaka (初代金剛兵衛盛高) and frame this early chapter, Ko-Kongōbyōe, as the Nanbokuchō founding generations rather than the Muromachi continuation. The smiths who anchor this phase in surviving work are Moritaka himself, present in a *mumei* katana attributed to Kongō Hyōe Moritaka, and Reizei Sadamori (冷泉貞盛), called a smith of the Kongōbyōe line and traditionally traced back to Moritaka. The repeated documentary touchstone is Sadamori's signed *tantō* inscribed "Chikushū Reizei Sadamori, Shōhei 25, first month, day," dated 1370, which fixes the active period of the early line and serves as the reference against which other works are appraised. One Moritaka attribution notes an example dated *Shōhei* 4 (1349), while the bulk of work bearing his name belongs to the Muromachi period and later, which separates the early Nanbokuchō chapter described here from what follows.
What the setsumei describe again and again is a *Yamato* temperament read in both *ji* and *ha*. The forging is *itame* mixed with *mokume*, often flowing toward *masame* near the edge, with the grain standing out (*hada-dachi*); *ji-nie* adheres and *chikei* enter as a relied-upon feature. The steel takes a somewhat dark, blackish *kanairo* with slight cloudiness, and a whitish *utsuri* or *shirake-utsuri* appears, conspicuously so in several of the wider katana. The temper is characteristically a narrow *suguha* or *hoso-suguha*, low in height, with a *nioiguchi* that tends toward tightness and *ko-nie*; along the *habuchi* come *hotsure*, *uchi-noke*, and a *nijūba*-like aspect, while *kinsuji* and *sunagashi* run modestly through *ji* and *ha*. The *bōshi* runs *sugu* to *ko-maru* with *hakikake* at the point, and grooves such as *bō-hi* or *futasuji-hi* are carved *kaki-nagashi*. A distinct sub-current within Sadamori's own work widens this manner: certain signed *hira-zukuri* pieces show *notare* mixed with *gunome*, abundant *ashi*, and *kuichigai-hi* in a *naginata-hi* arrangement, contrasted explicitly in one setsumei against the narrow-*suguha* dated standard. This early restraint, dark steel, *shirake* ground, and tight low *suguha* is what the records use to set Ko-Kongōbyōe apart from the later Sue-Kongōbyōe production carried into the Muromachi period.
For *kantei*, the setsumei converge on a recognizable cluster: flowing *itame* leaning to *masame*, well-entered *chikei*, blackish and whitish-cast steel showing the coloration the records tie to Kyūshū work, and a narrow *suguha* whose *nioiguchi* tends to *shizumi* with *hotsure* and *uchi-noke* along the edge. Many surviving blades are *ō-suriage mumei* katana in Nanbokuchō *taihai*, broad with shallow *sori* and extended *chū-* to *ō-kissaki*, while the signed evidence sits in *tantō* and *hira-zukuri wakizashi*. Named smiths attached to this phase are Moritaka and Reizei Sadamori, the latter also written Reizen Sadamori in earlier records. On provenance, the *tantō* certified *Jūyō Bijutsuhin* in 1939 was held by Koizumi Shinji of Kanagawa, and the line is documented in references including *Imamura Oshigata* and *Nihontō Taikan*, with later attributions to Sadamori grounded on the Shōhei 25 standard.
9 smiths · 0 Kokuhō · 0 Jūbun · 1 Jūbi · 1 Tokujū · 23 Jūyō
Major smiths
- Sadamori (貞盛) — Mainline · 1345-1350. Jūbi, Tokujū, Jūyō. Reizei Sadamori worked in Chikuzen during the Nanbokucho period, and the firmest anchor for his name is a single small tanto, signed and dated on the tang "Chikushu Reizei Sadamori, a day in the first month of Shohei 25"[[c:1]], that is, the year 1370. The published sources return to this one blade in nearly every entry on the smith, because signed work by him is so rare that the dated tanto has become the touchstone against which every other attribution is measured. They place him within the Kongobyoe line, traced back to the first-generation Kongobyoe Moritaka, and set him beside the Samonji school as the second of the two groups then forging in the province. What separates his line from the more famous Sa school, the published sources say, is temperament: his is read as a Yamato hand carried into Kyushu steel.
The greater part of his record is not signed at all. It consists of o-suriage mumei katana, broad of body, thin in the *kasane*, with an extended *chu-kissaki*, the shape of a long Nanbokucho blade cut down and judged to his hand. Over these the *jigane* is an *itame* that flows and leans toward *masame*, especially toward the edge, the grain standing, with *ji-nie* adhering thickly and *chikei* entering frequently; the steel takes a clouded, blackish *kanairo*, and a faint whitish *utsuri* stands in the surface. Over that *jigane* he tempers a low, narrow *suguha*, the *nioiguchi* tight, with *ko-nie*, fine *hotsure*, *uchinoke* and a tendency to *nijuba* near the *monouchi*, *sunagashi* and *kinsuji* running thinly within. The *boshi* goes straight to a small *ko-maru* with *hakikake* at the point, at times finishing in *yakizume*. This restrained, austere manner, not flamboyance, is the published sources' named point of interest in his work.
The *jigane* is the constant of the attribution. The flowing, *masame*-inclined steel, the standing grain, the dark *kanairo* and the whitish *utsuri* recur on blade after blade, and it is from these that the judges read his Yamato temperament. The published commentary calls the Kyushu coloration strongly present in his work, describing one Juyo katana as a richly flavored piece "in which the coloration characteristic of Kyushu swords is strongly expressed"[[c:2]]. The same sources are candid about the difficulty of the reading: on one shortened blade they note that such Yamato features also appear in works like Mihara, yet conclude that "from the standing texture of the jigane, the appraisal to Reizei Sadamori is the superior one"[[c:3]]. The narrow *suguha* and the dark, standing *jigane* together carry the name where no signature remains.
Against this quiet standard stand his few signed blades, which break the pattern. The Tokubetsu Juyo *wakizashi* signed "Reizei Sadamori, resident of Chikushu" and the Juyo *tanto* signed simply "Sadamori" abandon the narrow *suguha* for a *notare* mixed with *ko-gunome* and *gunome*, wider in the temper, with *ashi* and *yo* entering, *nie-deki*, abundant *sunagashi* and *kinsuji*, and a *midare-komi boshi* with strong *hakikake*. The published sources draw the distinction within his own work explicitly: of the signed *tanto* they observe that, "unlike the style of the Shohei 25 dated piece"[[c:4]], it shows a wider temper combining *gunome* into a broader *notare*, a richly varied workmanship. The smith thus worked in more than one manner, and the signed examples, precisely because they depart from the mumei standard, are prized for the study of his range.
What sets him apart is therefore named by the judges themselves rather than borrowed from a neighbor. He is read against the Samonji school by lineage and against the wider Yamato tradition by province: his bright, dark, *masame*-inclined *jigane*, his tight low *suguha*, and the Kyushu cast of his steel are the features the published sources name as his own, and the dated tanto is the document that holds them together. Within the Kongobyoe and Reizei line his is the name the school's shortened, unsigned katana most often carry, judged to him from that one dated standard, from the era, and from the manner of the group, the commentary cautioning on some blades that there is no decisive proof the hand must be his while still affirming the appraisal from the Yamato-toned *jigane* and the narrow edge.
For the collector he is a thinly recorded but genuine Nanbokucho name, valued for documentary weight as much as for display. He has no National Treasures and no Important Cultural Properties; his record runs instead through one Tokubetsu Juyo and a score of Juyo blades, with the Shohei 25 dated tanto and a tachi recognized in the prewar Juyo Bijutsuhin. Provenance is sparsely recorded, held in private hands rather than institutions, the dated tanto once in the Koizumi collection and the early *Sadamori* tachi with Morotomi Yoshio of Fukuoka. Most of his blades are the o-suriage mumei katana of the Juyo tier, and these come to light only from time to time; a signed Reizei Sadamori is rarer still, and one of the published sources calls the signed Tokubetsu Juyo *wakizashi* a precious work "by which the range of the seldom-signed Reizei Sadamori may be apprehended." A privately held example, signed or mumei, is a document of how a Yamato hand worked in Nanbokucho Chikuzen, and a thing a collector encounters seldom.
- Fusamori (房盛) — Mainline · 1362-1368. Smith of the Chikuzen Kongōbyōe School.
- Morishige (盛重) — Mainline · 1384-1387. Smith of the Chikuzen Kongōbyōe School.
- Moritaka (盛高) — Mainline · 1260-1261. Smith of the Chikuzen Kongōbyōe School.
- Moritaka (盛高) — Mainline · 1347-1352. Jūyō. Smith of the Chikuzen Kongōbyōe School.
- Moritaka (盛高) — Mainline · 1375-1379. Smith of the Chikuzen Kongōbyōe School.
Other smiths
- Moritaka (盛高) — Mainline · 1303-1306. Smith of the Chikuzen Kongōbyōe School.
- Moritsuna (盛綱) — Mainline · 1321-1324. Smith of the Chikuzen Kongōbyōe School.
- Yoshimori (吉盛) — Mainline · 1345-1350. Smith of the Chikuzen Kongōbyōe School.