In the Sengoku era the school served a second warrior court: the Later Hōjō at Odawara, whose patronage kept the Tsunahiro line forging hitatsura for the uchigatana age until the castle fell to Hideyoshi in 1590.
NihontoWatchNihontoWatchAi-zame gawa tsutsumi tsuka saya, aikuchi tanto koshirae Moto-haba (Width at Ha-machi) : Approx. 2.42 cm 頑強な造り込みながら、透彫と毛彫で雪華文(注)を施して洒落た風情を漂わせる拵。柄と鞘の総体を藍鮫皮で包み、銀地金具で総覆輪としている。表皮に細かな凹凸のある藍鮫は滑り止めの効用があり、日本近海でも採取されることから、古くから柄の素材として用いられてきた。また、水に強く渋い色合いから、装飾性の高い鞘の素材としても重宝されている。銀地金具は藍鮫の色調と適合して深みがあり、この拵でも落ち着いた風情の要因となっている。柄の先端に緒通しを目的とした猪目の透かしが施されており、目釘もまた環状の金具を用いたもので、隠れた美観が示されている。見どころは、下緒を通す環が設けられた腰元の胴金で、梅樹図小柄と割笄を収める部分に雪の結晶を透彫にし、縁金具にも浅い鋤彫で雪の結晶を散らしている。 収められている短刀は、駿河国島田に鍛冶場を設け、今川家、武田家、北条家などの武家の信頼を得て栄えた義助と極められた作。短寸ながら骨太な印象があり、良く錬れた板目鍛えの地鉄は全面に細やかな地沸が付き、淡い地景を伴う流れ肌を交えて肌起ち、肌目に添って流れるような映りが鮮明に現れる。刃文は直刃に小模様の互の目を交え、帽子は浅く湾れ込んで先大丸に返る。匂口柔らかに、しかも明るく冴えた焼刃は小足が入り、刃境にほつれが掛かり、太く細くと金線が入って一部稲妻となり、物打辺りに湯走りが掛かって二重刃の様相を呈する。(商品番号1802) 注... 雪華文は、古河藩主土井利位の研究による雪の結晶図『雪華図説』により、江戸時代後期に流行した。装剣小道具では後藤一乗が作品としている。
NihontoWatchOffered by Choshuya
2 on the market
Shimada (Suruga) · Suruga · around 1492-1504
Fujishiro Chu-jo saku
2 pieces on the market now
Yoshisuke is the principal mainstream name of the Shimada school of Suruga Province, a Muromachi workshop that the published sources place at the head of all Shimada work. "Within the group of works known as Shimada-mono, the principal mainstream lineage is that of Yoshisuke"[[c:1]], one Jūyō commentary states plainly, and the name carried that standing across several generations. The reference works arrange those generations with the first about the Kōshō era, called Yasumasa, the second about Meiō and Eishō, and successors continuing without break to the end of the Edo period. That neat scheme is the difficulty rather than the answer, for no work bearing a date earlier than Eishō survives, the oldest extant example being an Eishō 2 tantō of 1505 regarded as the second generation. Because the signature style does not separate the hands either, the published record holds that the individual generations cannot be told apart, and a signed Yoshisuke is read for its workmanship rather than assigned a number.
His characteristic hand is a Sōshū-leaning midare. Over the itame the temper is a notare crossed with gunome, the two together appearing on five of his six designated blades, with ko-chōji and pointed elements entering, ko-ashi, a nioiguchi inclining to tighten, and ko-nie adhering, through which sunagashi and kinsuji run. The kinship is stated outright: of one katana the published sources write that the Shimada style "bears a deep relationship with the late Sōshū smiths, and the two groups mutually influenced one another"[[c:2]]. The boshi follows the midare, running to a midare-komi that turns back with a pointed tendency, sometimes a yaki-tsume. Against this typical manner stands an uncommon register the NBTHK itself flags, a narrow suguha that on one late katana the commentary calls "a narrow suguha, comparatively uncommon for Yoshisuke"[[c:3]], the temper there a hoso-suguha with a slight admixture of small gunome, ko-nie adhering and a hotsure-like tendency.
The jigane is the steady foundation beneath both manners. The forging is an itame, well knit and at times dense, that overall flows and leans toward masame, standing somewhat open with hada-dachi on half his blades, fine ji-nie lying through it and a passage of one blade appearing whitish. This flowing, slightly standing itame, rather than a tight Bizen jigane, is what marks the Shimada hand for the eye, and it is the surface on which the nie activity of the ha is laid. On the finest of his blades the result is a jihada and hamon that the published record singles out for clarity, the v12 katana being judged the work in which "both jihada and hamon are especially clear and bright"[[c:4]] among his surviving pieces.
The Shimada workshop ranged widely in form, and Yoshisuke's surviving designations show it. They run from shinogi-zukuri katana with strong sakizori through hira-zukuri wakizashi and an uchizori tantō to a large-bodied yari, the published sources noting that "the Shimada lineage produced comparatively many yari"[[c:5]] and naming his ōmi-yari a superior example among them. His horimono are a school feature carried with skill, bonji and the figure of Marishiten cut in relief within a wide groove, shin and gyō kurikara on the two faces of a wakizashi, suken and gomabashi on a tantō. The mei is cut ubu, either a bare two-character Yoshisuke or a three-character Yoshisuke saku, at times in a fine chisel cut large, and because the dates and signatures will not divide the generations it is the quality of a given blade, not its mei, that the published sources weigh.
What distinguishes Yoshisuke is best drawn from his own grounded traits rather than by contrast. His is the Sōshū-influenced notare-gunome in nie, with sunagashi and kinsuji over a flowing, standing itame, a provincial Suruga reading of the late Sōshū idiom; the narrow suguha is the deliberate exception, and the prominent horimono and the yari are the marks of the broader Shimada shop around him. Where a generational verdict is impossible, the commentary turns to the blade itself, calling the v20 tantō, an ubu hira-zukuri piece with uchizori, "an exceptional blade among works signed with this name"[[c:6]], and reading another katana as a work near the earliest surviving phase. The cut struck into the mune at the monouchi of one of his katana drew a separate remark, the published sources observing that it "speaks to martial use"[[c:7]], a reminder that these were the working blades of a Muromachi province.
Yoshisuke is rated Chū-jō saku by Fujishiro, a solid provincial standing rather than a first rank, and his designated record is modest in scale and entirely signed. Six of his blades hold the Jūyō rank, his record reaching no higher tier, so his work is encountered as Jūyō and lower-ranked pieces rather than as patrimony held permanently out of reach. One blade carries a notable provenance, having been held by the Imperial Family. The number of designated works on record is small, and across the run of generations under one undivided name a securely fine example, of the clarity the published sources praise in his best katana and tantō, is the thing worth waiting for. Such a blade comes to market only from time to time, and when one does it is a good representative of a respected provincial school whose work sits close to the late Sōshū tradition.
Where Yoshisuke stands among comparable artisans: across all of nihontō, and within tradition, era, and period. The tiers (Foremost · Leading · Major · Notable) weigh official designations from the NBTHK and Japan's Agency for Cultural Affairs, together with historical honors of lasting repute such as the Sansaku and Meibutsu-chō.
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Soshu-den · Suruga
9 pieces on the market now
The Shimada school (島田) took its name from its base in Suruga Province, where it worked from the mid-Muromachi period along the Tōkaidō between the Mino hearths and the late Sōshū smiths of neighboring Sagami. The published sources place its founding generation in the Kōshō (or Kyōshō) era and trace its principal names without interruption down into the shintō period, with the same names continuing as late as the shinshintō era. Three smiths stand as the school's central hands: Yoshisuke (義助), held to be the principal mainstream name at the head of all Shimada work; Sukemune (助宗), recorded as the younger brother of the founder; and Hirosuke (廣助), placed as the son of the second-generation Yoshisuke. The oldest extant dated example, an Eishō 2 (1505) tantō by Yoshisuke, fixes the early corpus, and because the signature style does not separate the hands, a signed Shimada blade is read for its workmanship rather than assigned a generation. The Shimada smiths produced the working blades of the Muromachi century; one Hirosuke katana, a Kōshū-uchi work dated Eiroku 2 (1559), was held by Hara Mino Nyūdō Toratane of the Twenty-Four Generals of the Takeda, and the cut struck into the mune at the monouchi of a Yoshisuke katana drew a NBTHK remark that it speaks to martial use. Across the members the school reads in a single Soshu-den idiom inflected by Mino and Ise. The jigane the smiths describe is an itame, well knit and at times dense, that flows and leans toward masame, standing somewhat open in hada-dachi, with fine ji-nie lying through it, chikei entering, and a tonality the commentaries repeatedly call whitish; this flowing, slightly standing steel, rather than a tight Bizen surface, is what marks the Shimada hand for the eye. Upon it the smiths set a notare crossed with gunome, with ko-chōji and pointed togariba entering, ko-ashi, abundant nie, and sunagashi and kinsuji running through, the bōshi commonly midare-komi turning back rounded, at times with hakikake; tobiyaki and slight muneyaki appear, and on the larger blades the activity rises toward hitatsura in nie.
Sukemune's particular register is the connected gunome the NBTHK names the school's hallmark, while Hirosuke shows the most robust make, favoring a wide mihaba with sakizori and an extended kissaki. Against this typical midare every hand keeps a quieter exception: a hoso-suguha the commentary calls comparatively uncommon for Yoshisuke, and a suguha mixed with small gunome on a Sukemune tantō read as made with an eye toward the manner of Shizu. The carving tradition is shared throughout, bonji, suken, gomabashi, relief kurikara, and the figures of Marishiten and Fudō Myōō, with openwork sukashi-bori noted by examiners as an uncommon thing to find; the school also produced comparatively many yari, Yoshisuke's ōmi-yari among them. To kantei a Shimada blade is to read the late Sōshū idiom in a provincial Suruga register: the whitish, standing itame beneath a nie-laden notare-gunome with sunagashi, kinsuji, and frequent tobiyaki, set apart from a tight Bizen jigane and tied by the published sources to Sue-Sōshū, late Seki, the Senju group, and the work of Mino and Ise. Form sorts the manner: the broad Sōshū-leaning katana on one side, the school's tantō and wakizashi (often hira-zukuri with mitsu-mune, thick kasane, and a withered fukura kare) on the other. Among the members Yoshisuke is the name the sources reach for in describing the group, his finest katana and tantō praised for a jihada and hamon of clear, bright result; Sukemune's Osaka katana is judged his finest work; and Hirosuke's best pieces, one called hakubi, the best among its kind, with a suggestion he privately emulated Bizen Chōgi, number among the finest of the whole lineage. Dated and fully signed works such as those inscribed Shimada Hirosuke are particularly valued, the tangs anchoring the chronology of the later generations, and a rare collaborative blade between Hirosuke and Gensuke attests to the collegial working of the shop. Provenance reaches to the Imperial collection, Honma's inventory of which records works by Yoshisuke, Sukemune, and Hirosuke; with the Takeda general's blade and the documentary dated pieces, these holdings mark the standing of a respected one-province school whose hand sits close to the late Sōshū tradition. Learn more →
| Smith | Era | Designated |
|---|---|---|
| Yoshisuke義助 | 1492-1504 | 6 |
| Sukemune助宗 | 1444-1449 | 4 |
| Yoshisuke義助 | 1455-1526 | 5 |
| Yoshisuke義助 | 1573-1592 | 3 |
| Yoshisuke義助 | 1394-1428 | 2 |
Sōshū in the Muromachi period
In the Sengoku era the school served a second warrior court: the Later Hōjō at Odawara, whose patronage kept the Tsunahiro line forging hitatsura for the uchigatana age until the castle fell to Hideyoshi in 1590.
Certifies a genuine blade worth preserving: a signature confirmed correct, or, if unsigned, an era, province, and school that the NBTHK can reliably identify.
The NBTHK (Nihon Bijutsu Tōken Hozon Kyōkai, the Society for the Preservation of Japanese Art Swords) is a public-interest incorporated foundation founded in 1948 and supervised by Japan’s Agency for Cultural Affairs (Bunkachō); it is based at the Japanese Sword Museum in Tokyo. Its expert panels physically examine each submitted work (shinsa) and issue a certificate (kanteishō) ranking it by artistic and historical merit. NBTHK papers are the most widely recognized standard of authentication for Japanese swords and fittings.
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