Sōshū was born in a boomtown: Kamakura, seat of the warrior government, dense with elite patrons. Tradition holds that master smiths were summoned east to serve it, and from their students came Shintōgo Kunimitsu and then Masamune.
This is a mumei katana attributed to Go Yoshihiro of Etchu Province, a renowned smith of the Soshu tradition. It is a former heirloom of the Date family and comes with sayagaki by both Kanzan Sensei and Tanobe Sensei. The blade features a bright jigane with intricate chikei and a gentle notare hamon with deep nie, sunagashi, kinsuji, and yubashiri, and is accompanied by an NBTHK Tokubetsu Hozon Token certificate.
Certificate reading — 無銘（伝江）
NihontoWatchmumei · Soshu · Kamakura · nagasa 73cm · sori 1.5cm
Soshu / Etchu (Matsukura Go) · Etchu · around 1299-1302
Fujishiro Sai-jo saku · Tōken Taikan top 5%
1 piece on the market now
Go is the name by which Yoshihiro of Matsukura-gō in Etchū is known, and the published sources place him among the ten disciples of Masamune[[c:1]], one of the supreme names in the whole study of the sword. Like Sadamune he left no genuine signed work; every blade that carries his name is ō-suriage and mumei, an attribution resting on the judgment of the Hon'ami and the later appraisers, so the smith survives only through his manner and through the great houses that kept him. He stands at the very end of the Kamakura period and the opening of the Nanbokuchō, when the Sōshū tradition that Masamune had brought to completion was carried west into Etchū.
The jigane is the first thing the published sources reach for. It is an itame, often mixed with mokume and with a flowing nagare-hada that stands up a little, and in places it inclines strongly to masame; over it the ji-nie lies microscopically fine and thick, and chikei enter frequently, so the steel reads bright and clear. The appraisers make a point of the masame-gokoro worked into the hada (柾ごころ), one of the tells they list for his hand, and they single out that the ji and ha together come up a degree brighter and clearer than his fellows[[c:2]].
The hamon is built on a notare, broad and gentle, with ko-notare and gunome mixed in and the temper height tending to broaden from the base toward the monouchi. Ashi and yō enter, the nioiguchi is deep, and the nie lies thick and even, breaking in places into nie-kuzure with standing nie-suji; through the ha run abundant kinsuji and sunagashi, with occasional yubashiri spilling into the ji. Set beside Masamune and Norishige, the published sources call his chikei and kinsuji the calmer (穏やか), yet they note the nie-ashi working busily within the ha and the whole coming up brighter, which is exactly where they locate him.
The bōshi is where Go is most distinctly himself, and it is the feature the published record names outright as a major characteristic of his hand: the point is tempered deep, sweeping with hakikake (掃きかけ) and breaking into a nie-kuzure so that it becomes an ichimai-style bōshi, the whole tip hardened nearly solid. A representative Tokubetsu-Jūyō katana records it precisely, the bōshi burned deep into a single sheet, collapsing in nie and brushing out in hakikake[[c:4]]. Where it does turn back it settles into a quiet ko-maru, the return sometimes running long; but the deep, swept, single-sheet point is the signature, and a profile that gives him only a calm ko-maru has misread the smith.
For the collector the recognition runs in this order: a clear itame with thick fine ji-nie and frequent chikei, masame creeping into the hada, a deep-nie notare carrying kinsuji and sunagashi, and the deep ichimai-swept bōshi above it[[c:3]], the entire ji and ha lit a degree brighter than the surrounding masters. That brightness and clarity is the discriminator the appraisers use to part him from Masamune himself and from Norishige, whose hada stands up more and whose matsukawa is the heavier. Fujishiro places him at Sai-jō saku, the highest rank, and among all Sōshū hands his is reckoned at the summit.
Because nothing of his is signed and so little survives, Go is among the least attainable of all names. Of the work on record a few sit as National Treasures and Important Cultural Properties that can never trade, and the named meibutsu carry the histories of the great daimyō: the Ōkubo Gō (大久保江), which bears a Hon'ami gold-inlay attribution and descended to the Ōkubo of Odawara, and the Kabutokiri Gō (兜切り江), once of the Mizuno family. Others pass through the Uwajima Date family, one of them bestowed by Tokugawa Hidetada on the first lord of Uwajima and kept thereafter as a house treasure, while further blades descended through the Maeda. To meet a Gō at all is to meet a blade the appraisers judged worthy of the very first names, held for centuries by the houses that could command it.
Where Go Yoshihiro 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.
Select a lens to see how it's measured.
Soshu-den · Sagami
Phase: Sōshū相州· 1288–1385
46 pieces on the market now
Steel "bright and clear," with thick ji-nie and chikei entering frequently, is the constant the NBTHK returns to in nearly every blade of this phase, and it marks the moment the Soshu tradition reached its summit in Sagami. " The sampled blades cluster around the masters who carried this manner forward: Go Yoshihiro of Matsukura-go in Etchu, counted among the Masamune Juttetsu and represented here by numerous ō-suriage katana, and the Sagami smiths Hiromitsu and Akihiro, who stand "next after Sadamune" and extend the phase with dated works running from Enbun 2 (1357) to Shitoku 4 (1387). The window spans late Kamakura proportions through the broad Enbun-Joji forms of the fourteenth century. The phase reads as itame-hada mixed with mokume, often tending toward standing or flowing grain, carrying very fine ji-nie laid thickly with chikei threaded densely throughout; over this the hamon is founded on notare mixed with gunome, ko-gunome, and a chōji flavor, with deep nioi, thick nie, and kinsuji and sunagashi running well, the nioiguchi bright and clear. This is precisely the distance the school traveled from its Awataguchi roots: where that foundation held a tight, restrained suguha, the Go katana break into wide yakihaba, nie-kuzure, and yubashiri (one setsumei records nie that "gathers, thickens, and congeals"), with a bōshi tempered so deeply it becomes ichimai and sweeps in hakikake. Go himself sits one step calmer than Masamune and Norishige, his chikei and kinsuji more reserved but his ji and ha a step brighter, the hada often masame-inclined; one wide-suguha example with ko-midare shows how close the quiet end of his range stays to the Kunimitsu manner.
" Here the classic phase divides from the later Sue-Soshu continuation, whose Muromachi smiths inherited the vocabulary without the depth of nie and clarity of steel recorded in these blades. A collector separates this phase because it holds the recognized masters at full strength. Go achieved the highest designation through the unmistakable brightness of his ji-ha alone, despite no surviving signed works, and the sample carries the weight of that reputation: the meibutsu Nakagawa-Go owned by a retainer of Oda Nobunaga and later the Tokugawa house, the "Kabuto-giri" Go inlaid by Hon'ami appraisal, the Okubo-Go transmitted in the Odawara Okubo family, and blades held by the Uwajima Date and Chikuzen Kuroda houses, with names recorded in the Kyoho Meibutsu-cho. The kantei points are concrete and repeated: Go's active nie-ashi, masame tendency, and ichimai bōshi; Akihiro's dated five-character "Soshu Akihiro" signatures, whose shift from full to abbreviated dating after Eiwa lets a viewer place a blade in time; and the near-indistinguishability of Hiromitsu and Akihiro, parsed only by scale and the prominence of dango-chōji. These are the works that define the Soshu apex, against which both the Awataguchi foundation and the Sue-Soshu aftermath are measured. Learn more →
| Smith | Era | Designated |
|---|---|---|
| Masamune正宗 | 1288-1293 | 84 |
| Sadamune貞宗 | 1329-1331 | 86 |
| Go Yoshihiro義弘 | 1299-1302 | 54 |
| Akihiro秋廣 | 1346-1370 | 27 |
| Kunimitsu國光 | 1293-1322 | 69 |
Sōshū in the Kamakura period
Sōshū was born in a boomtown: Kamakura, seat of the warrior government, dense with elite patrons. Tradition holds that master smiths were summoned east to serve it, and from their students came Shintōgo Kunimitsu and then Masamune.
A Hozon-certified blade judged to show notably superior workmanship and a better state of preservation. The bar is higher: re-tempered blades and most unsigned Muromachi/Edo works are excluded.
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.
NBTHK official siteIf you wish to return an item, please notify us within 3 days of receipt. After this period we cannot accept cancellations. Please ship the return to us within 5 business days. Cancellation is conditional on the item being kept in the same condition as at the time of sale, so please handle it with care.
¥35,000,000
This is a mumei katana attributed to Go Yoshihiro of Etchu Province, a renowned smith of the Soshu tradition. It is a former heirloom of the Date family and comes with sayagaki by both Kanzan Sensei and Tanobe Sensei. The blade features a bright jigane with intricate chikei and a gentle notare hamon with deep nie, sunagashi, kinsuji, and yubashiri, and is accompanied by an NBTHK Tokubetsu Hozon Token certificate.
Certificate reading — 無銘（伝江）
NihontoWatchmumei · Soshu · Kamakura · nagasa 73cm · sori 1.5cm
Soshu / Etchu (Matsukura Go) · Etchu · around 1299-1302
Fujishiro Sai-jo saku · Tōken Taikan top 5%
1 piece on the market now
Go is the name by which Yoshihiro of Matsukura-gō in Etchū is known, and the published sources place him among the ten disciples of Masamune[[c:1]], one of the supreme names in the whole study of the sword. Like Sadamune he left no genuine signed work; every blade that carries his name is ō-suriage and mumei, an attribution resting on the judgment of the Hon'ami and the later appraisers, so the smith survives only through his manner and through the great houses that kept him. He stands at the very end of the Kamakura period and the opening of the Nanbokuchō, when the Sōshū tradition that Masamune had brought to completion was carried west into Etchū.
The jigane is the first thing the published sources reach for. It is an itame, often mixed with mokume and with a flowing nagare-hada that stands up a little, and in places it inclines strongly to masame; over it the ji-nie lies microscopically fine and thick, and chikei enter frequently, so the steel reads bright and clear. The appraisers make a point of the masame-gokoro worked into the hada (柾ごころ), one of the tells they list for his hand, and they single out that the ji and ha together come up a degree brighter and clearer than his fellows[[c:2]].
The hamon is built on a notare, broad and gentle, with ko-notare and gunome mixed in and the temper height tending to broaden from the base toward the monouchi. Ashi and yō enter, the nioiguchi is deep, and the nie lies thick and even, breaking in places into nie-kuzure with standing nie-suji; through the ha run abundant kinsuji and sunagashi, with occasional yubashiri spilling into the ji. Set beside Masamune and Norishige, the published sources call his chikei and kinsuji the calmer (穏やか), yet they note the nie-ashi working busily within the ha and the whole coming up brighter, which is exactly where they locate him.
The bōshi is where Go is most distinctly himself, and it is the feature the published record names outright as a major characteristic of his hand: the point is tempered deep, sweeping with hakikake (掃きかけ) and breaking into a nie-kuzure so that it becomes an ichimai-style bōshi, the whole tip hardened nearly solid. A representative Tokubetsu-Jūyō katana records it precisely, the bōshi burned deep into a single sheet, collapsing in nie and brushing out in hakikake[[c:4]]. Where it does turn back it settles into a quiet ko-maru, the return sometimes running long; but the deep, swept, single-sheet point is the signature, and a profile that gives him only a calm ko-maru has misread the smith.
For the collector the recognition runs in this order: a clear itame with thick fine ji-nie and frequent chikei, masame creeping into the hada, a deep-nie notare carrying kinsuji and sunagashi, and the deep ichimai-swept bōshi above it[[c:3]], the entire ji and ha lit a degree brighter than the surrounding masters. That brightness and clarity is the discriminator the appraisers use to part him from Masamune himself and from Norishige, whose hada stands up more and whose matsukawa is the heavier. Fujishiro places him at Sai-jō saku, the highest rank, and among all Sōshū hands his is reckoned at the summit.
Because nothing of his is signed and so little survives, Go is among the least attainable of all names. Of the work on record a few sit as National Treasures and Important Cultural Properties that can never trade, and the named meibutsu carry the histories of the great daimyō: the Ōkubo Gō (大久保江), which bears a Hon'ami gold-inlay attribution and descended to the Ōkubo of Odawara, and the Kabutokiri Gō (兜切り江), once of the Mizuno family. Others pass through the Uwajima Date family, one of them bestowed by Tokugawa Hidetada on the first lord of Uwajima and kept thereafter as a house treasure, while further blades descended through the Maeda. To meet a Gō at all is to meet a blade the appraisers judged worthy of the very first names, held for centuries by the houses that could command it.
Where Go Yoshihiro 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.
Select a lens to see how it's measured.
Soshu-den · Sagami
Phase: Sōshū相州· 1288–1385
46 pieces on the market now
Steel "bright and clear," with thick ji-nie and chikei entering frequently, is the constant the NBTHK returns to in nearly every blade of this phase, and it marks the moment the Soshu tradition reached its summit in Sagami. " The sampled blades cluster around the masters who carried this manner forward: Go Yoshihiro of Matsukura-go in Etchu, counted among the Masamune Juttetsu and represented here by numerous ō-suriage katana, and the Sagami smiths Hiromitsu and Akihiro, who stand "next after Sadamune" and extend the phase with dated works running from Enbun 2 (1357) to Shitoku 4 (1387). The window spans late Kamakura proportions through the broad Enbun-Joji forms of the fourteenth century. The phase reads as itame-hada mixed with mokume, often tending toward standing or flowing grain, carrying very fine ji-nie laid thickly with chikei threaded densely throughout; over this the hamon is founded on notare mixed with gunome, ko-gunome, and a chōji flavor, with deep nioi, thick nie, and kinsuji and sunagashi running well, the nioiguchi bright and clear. This is precisely the distance the school traveled from its Awataguchi roots: where that foundation held a tight, restrained suguha, the Go katana break into wide yakihaba, nie-kuzure, and yubashiri (one setsumei records nie that "gathers, thickens, and congeals"), with a bōshi tempered so deeply it becomes ichimai and sweeps in hakikake. Go himself sits one step calmer than Masamune and Norishige, his chikei and kinsuji more reserved but his ji and ha a step brighter, the hada often masame-inclined; one wide-suguha example with ko-midare shows how close the quiet end of his range stays to the Kunimitsu manner.
" Here the classic phase divides from the later Sue-Soshu continuation, whose Muromachi smiths inherited the vocabulary without the depth of nie and clarity of steel recorded in these blades. A collector separates this phase because it holds the recognized masters at full strength. Go achieved the highest designation through the unmistakable brightness of his ji-ha alone, despite no surviving signed works, and the sample carries the weight of that reputation: the meibutsu Nakagawa-Go owned by a retainer of Oda Nobunaga and later the Tokugawa house, the "Kabuto-giri" Go inlaid by Hon'ami appraisal, the Okubo-Go transmitted in the Odawara Okubo family, and blades held by the Uwajima Date and Chikuzen Kuroda houses, with names recorded in the Kyoho Meibutsu-cho. The kantei points are concrete and repeated: Go's active nie-ashi, masame tendency, and ichimai bōshi; Akihiro's dated five-character "Soshu Akihiro" signatures, whose shift from full to abbreviated dating after Eiwa lets a viewer place a blade in time; and the near-indistinguishability of Hiromitsu and Akihiro, parsed only by scale and the prominence of dango-chōji. These are the works that define the Soshu apex, against which both the Awataguchi foundation and the Sue-Soshu aftermath are measured. Learn more →
| Smith | Era | Designated |
|---|---|---|
| Masamune正宗 | 1288-1293 | 84 |
| Sadamune貞宗 | 1329-1331 | 86 |
| Go Yoshihiro義弘 | 1299-1302 | 54 |
| Akihiro秋廣 | 1346-1370 | 27 |
| Kunimitsu國光 | 1293-1322 | 69 |
Sōshū in the Kamakura period
Sōshū was born in a boomtown: Kamakura, seat of the warrior government, dense with elite patrons. Tradition holds that master smiths were summoned east to serve it, and from their students came Shintōgo Kunimitsu and then Masamune.
A Hozon-certified blade judged to show notably superior workmanship and a better state of preservation. The bar is higher: re-tempered blades and most unsigned Muromachi/Edo works are excluded.
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.
NBTHK official siteIf you wish to return an item, please notify us within 3 days of receipt. After this period we cannot accept cancellations. Please ship the return to us within 5 business days. Cancellation is conditional on the item being kept in the same condition as at the time of sale, so please handle it with care.
¥35,000,000
