Mei: "Mumei" Type: Katana Nagasa: 2 shaku 2 sun 4 bu Sori: 8 bu Motohaba: 28 mm Motokasane: 7 mm Sakihaba: 20 mm Sakikasane: 6 mm Toshin weight: 598 grams (All measurements are approximate) Tokyo Metropolitan Board of Education Ko-Nyudo Kunimitsu was a swordsmith who moved from Yamato Province to Etchu Province around the Bunpo era at the end of the Kamakura period. He founded the Uda school, became the patriarch of the Uda lineage, and trained numerous swordsmiths. This blade features a beautiful sori profile with thick jinie. The unique jihada is fine and well-packed, with a quality of workmanship reminiscent of the Rai school. The hataraki shows a tight nioiguchi with konie, featuring hotsure and yubashiri that intertwine to create an antique flavor. It is a masterpiece of peerless workmanship, praised as a superior work (yuhin) by the current authority, Mr. Tanobe. Two habaki are included. When the toshin is placed in the koshirae, there is a slight rattling in the tsuka of the koshirae. 0 Yen (Tax included)
NihontoWatchmumei · Kamakura
Wakimono · Etchu · around 1317-1319
Tōken Taikan top 21%
Uda Kunimitsu (宇多国光), known as Ko-nyudo Kunimitsu (古入道国光), is traditionally regarded as the founder of the Uda school. According to accepted tradition, around the Bunpo era (1317–1319) he relocated from Uda District in Yamato Province to Utsu in Etchu Province, establishing a lineage that would flourish through subsequent generations. He is said to have had sons named Kunifusa and Kunimune, and subsequent smiths bearing the name Kunimitsu appear to span several generations from the late Kamakura into the Nanbokucho period. No definitively signed works by Ko-nyudo Kunimitsu himself are confirmed; however, extant tachi bearing the signature "Uda Kunimitsu" and datable to the late Kamakura period are reasonably attributed to his hand.
Blades attributed to Ko-nyudo Kunimitsu strongly display a Yamato-like character in both jihada and hamon[[c:1]]. The forging typically shows tightly worked ko-itame-hada, at times with masame-hada mixed in toward the edge, well covered with ji-nie and intermingled with chikei. A whitish utsuri reminiscent of shirake may stand out in the ji. The hamon is characteristically suguha-based, occasionally exhibiting shallow notare with a slight admixture of small gunome; ko-nie adheres well, and sunagashi and kinsuji appear along the temper line. The boshi returns in ko-maru with hakikake at the tip. Bo-hi carved on both sides with maru-dome is a recurring feature.
Ko-nyudo Kunimitsu occupies a position of considerable importance as the progenitor of the Uda school, one of the principal forging traditions of Etchu Province. His work demonstrates the direct transmission of Yamato-den characteristics into a provincial setting during the late Kamakura period. Blades attributed to his hand that survive in kenzen condition constitute valuable reference material for understanding the formative period of the Uda tradition and the broader dissemination of Yamato forging methods into the northern provinces.
Where Kunimitsu 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.
Wakimono · Etchu
Phase: Ko-Uda古宇多· 1310–1394
7 pieces on the market now
Ko-Uda (古宇多) names the founding stratum of the Uda school, the work that does not descend later than the Nanbokucho period and so stands before the long Muromachi continuation that the same studio names would carry. The setsumei place the origin in Yamato: around the Bunpo era at the close of Kamakura, the monk-smith Ko-nyudo Kunimitsu left Uda District in Yamato and settled at Utsu in Etchu, and from him the lineage took root. His sons Kunifusa and Kunimune are recorded, and across the Juyo and Jubi explanations the active founding hands are listed together as Kunifusa, Kunimune, and Kunitsugu, the generations that worked through the Nanbokucho period before the name-bearing successions ran down into late Muromachi. A signed Ko-nyudo Kunimitsu is hard to fix among several smiths who used the name; the Tokuju tachi is read as the founder precisely because it shows the most archaic character of the surviving examples, earlier even than the Kunifusa pieces taken for Nanbokucho. The early steel is the school read at its source. The forging is itame mixed with mokume and running nagare-hada that tends to stand (hada-dachi), ji-nie adhering with chikei, and over it a whitish shirake-utsuri or, on the founder's own work, a nie-utsuri; the jigane carries a blackish, golden-toned cast that the explanations call a northern-province feeling. The temper sits in narrow to chu-suguha, opening into ko-notare, ko-gunome, ko-midare, and togariba, with ko-ashi and yo and ko-nie well set; along the habuchi the Yamato signature of hotsure and kuichigai-ba appears, while kinsuji and sunagashi run through.
Against the later Uda generations, the Ko-Uda face is the purer one. The Tokuju founder is appraised as workmanship entirely like Yamato; the Hie Shrine and Kurokawa tachi by the shodai Kunifusa hold a tight, clear nioiguchi and a bright forging, and the nie in the best stands strong and rounded where the later hands run coarser and more provincial. A Soshu lean exists, traced to the study of Norishige and Go, yet in this phase the steel and nioiguchi keep returning the blade to Yamato roots rather than dissolving into them. To kantei a Ko-Uda blade is to catch the standing, whitish jigane with its masame tendency and utsuri beneath a suguha that might otherwise recall Yamashiro, and to bring a nie-rich, chikei-laden example home from Soshu by the dark steel and the subdued (shizumi) nioiguchi. The named early hands recur across the corpus: the shodai Kunifusa, fixed against dated pieces no earlier than Koo 1 (1389) and the calligraphy of the lattice-broken 国; the signed Ko-Uda Kunimitsu and Ko-Uda Tomonori of around Meitoku; and the rare Tomoshige and Tomonori, smiths of few survivals through whom the phase's reach is gauged. Because signed early work is uncommon, the phase leans on mumei attributions read off forging and temper, several entered as den Ko-nyudo Kunimitsu. Provenance settles into shrine and institutional holding, the Hie Shrine and Kurokawa Institute tachi serving as the calibrating standards against which other early Kunifusa are judged, and the dated examples valued as documentary footing for the study of how Yamato workmanship took its northern form. Learn more →
| Smith | Era | Designated |
|---|---|---|
| Ko-Uda古宇多 | 1310-1360 | 50 |
| Kunifusa國房 | 1368-1375 | 17 |
| Kunimitsu國光 | 1362-1368 | 9 |
| Tomonori友則 | 1390-1394 | 4 |
| Kunitsugu國次 | 1356-1361 | 1 |
Nearly every later authority calls Kamakura the golden age of the sword: the first warrior government as patron, the great traditions at full strength simultaneously, and, tradition holds, the finest smiths of the realm rotating through Go-Toba’s court.
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 sitePlease notify us of your intention to return, by email or fax, no later than the day after the item's arrival. Return shipping, insurance, and refund transfer fees are the customer's responsibility.
Mei: "Mumei" Type: Katana Nagasa: 2 shaku 2 sun 4 bu Sori: 8 bu Motohaba: 28 mm Motokasane: 7 mm Sakihaba: 20 mm Sakikasane: 6 mm Toshin weight: 598 grams (All measurements are approximate) Tokyo Metropolitan Board of Education Ko-Nyudo Kunimitsu was a swordsmith who moved from Yamato Province to Etchu Province around the Bunpo era at the end of the Kamakura period. He founded the Uda school, became the patriarch of the Uda lineage, and trained numerous swordsmiths. This blade features a beautiful sori profile with thick jinie. The unique jihada is fine and well-packed, with a quality of workmanship reminiscent of the Rai school. The hataraki shows a tight nioiguchi with konie, featuring hotsure and yubashiri that intertwine to create an antique flavor. It is a masterpiece of peerless workmanship, praised as a superior work (yuhin) by the current authority, Mr. Tanobe. Two habaki are included. When the toshin is placed in the koshirae, there is a slight rattling in the tsuka of the koshirae. 0 Yen (Tax included)
NihontoWatchmumei · Kamakura
Wakimono · Etchu · around 1317-1319
Tōken Taikan top 21%
Uda Kunimitsu (宇多国光), known as Ko-nyudo Kunimitsu (古入道国光), is traditionally regarded as the founder of the Uda school. According to accepted tradition, around the Bunpo era (1317–1319) he relocated from Uda District in Yamato Province to Utsu in Etchu Province, establishing a lineage that would flourish through subsequent generations. He is said to have had sons named Kunifusa and Kunimune, and subsequent smiths bearing the name Kunimitsu appear to span several generations from the late Kamakura into the Nanbokucho period. No definitively signed works by Ko-nyudo Kunimitsu himself are confirmed; however, extant tachi bearing the signature "Uda Kunimitsu" and datable to the late Kamakura period are reasonably attributed to his hand.
Blades attributed to Ko-nyudo Kunimitsu strongly display a Yamato-like character in both jihada and hamon[[c:1]]. The forging typically shows tightly worked ko-itame-hada, at times with masame-hada mixed in toward the edge, well covered with ji-nie and intermingled with chikei. A whitish utsuri reminiscent of shirake may stand out in the ji. The hamon is characteristically suguha-based, occasionally exhibiting shallow notare with a slight admixture of small gunome; ko-nie adheres well, and sunagashi and kinsuji appear along the temper line. The boshi returns in ko-maru with hakikake at the tip. Bo-hi carved on both sides with maru-dome is a recurring feature.
Ko-nyudo Kunimitsu occupies a position of considerable importance as the progenitor of the Uda school, one of the principal forging traditions of Etchu Province. His work demonstrates the direct transmission of Yamato-den characteristics into a provincial setting during the late Kamakura period. Blades attributed to his hand that survive in kenzen condition constitute valuable reference material for understanding the formative period of the Uda tradition and the broader dissemination of Yamato forging methods into the northern provinces.
Where Kunimitsu 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.
Wakimono · Etchu
Phase: Ko-Uda古宇多· 1310–1394
7 pieces on the market now
Ko-Uda (古宇多) names the founding stratum of the Uda school, the work that does not descend later than the Nanbokucho period and so stands before the long Muromachi continuation that the same studio names would carry. The setsumei place the origin in Yamato: around the Bunpo era at the close of Kamakura, the monk-smith Ko-nyudo Kunimitsu left Uda District in Yamato and settled at Utsu in Etchu, and from him the lineage took root. His sons Kunifusa and Kunimune are recorded, and across the Juyo and Jubi explanations the active founding hands are listed together as Kunifusa, Kunimune, and Kunitsugu, the generations that worked through the Nanbokucho period before the name-bearing successions ran down into late Muromachi. A signed Ko-nyudo Kunimitsu is hard to fix among several smiths who used the name; the Tokuju tachi is read as the founder precisely because it shows the most archaic character of the surviving examples, earlier even than the Kunifusa pieces taken for Nanbokucho. The early steel is the school read at its source. The forging is itame mixed with mokume and running nagare-hada that tends to stand (hada-dachi), ji-nie adhering with chikei, and over it a whitish shirake-utsuri or, on the founder's own work, a nie-utsuri; the jigane carries a blackish, golden-toned cast that the explanations call a northern-province feeling. The temper sits in narrow to chu-suguha, opening into ko-notare, ko-gunome, ko-midare, and togariba, with ko-ashi and yo and ko-nie well set; along the habuchi the Yamato signature of hotsure and kuichigai-ba appears, while kinsuji and sunagashi run through.
Against the later Uda generations, the Ko-Uda face is the purer one. The Tokuju founder is appraised as workmanship entirely like Yamato; the Hie Shrine and Kurokawa tachi by the shodai Kunifusa hold a tight, clear nioiguchi and a bright forging, and the nie in the best stands strong and rounded where the later hands run coarser and more provincial. A Soshu lean exists, traced to the study of Norishige and Go, yet in this phase the steel and nioiguchi keep returning the blade to Yamato roots rather than dissolving into them. To kantei a Ko-Uda blade is to catch the standing, whitish jigane with its masame tendency and utsuri beneath a suguha that might otherwise recall Yamashiro, and to bring a nie-rich, chikei-laden example home from Soshu by the dark steel and the subdued (shizumi) nioiguchi. The named early hands recur across the corpus: the shodai Kunifusa, fixed against dated pieces no earlier than Koo 1 (1389) and the calligraphy of the lattice-broken 国; the signed Ko-Uda Kunimitsu and Ko-Uda Tomonori of around Meitoku; and the rare Tomoshige and Tomonori, smiths of few survivals through whom the phase's reach is gauged. Because signed early work is uncommon, the phase leans on mumei attributions read off forging and temper, several entered as den Ko-nyudo Kunimitsu. Provenance settles into shrine and institutional holding, the Hie Shrine and Kurokawa Institute tachi serving as the calibrating standards against which other early Kunifusa are judged, and the dated examples valued as documentary footing for the study of how Yamato workmanship took its northern form. Learn more →
| Smith | Era | Designated |
|---|---|---|
| Ko-Uda古宇多 | 1310-1360 | 50 |
| Kunifusa國房 | 1368-1375 | 17 |
| Kunimitsu國光 | 1362-1368 | 9 |
| Tomonori友則 | 1390-1394 | 4 |
| Kunitsugu國次 | 1356-1361 | 1 |
Nearly every later authority calls Kamakura the golden age of the sword: the first warrior government as patron, the great traditions at full strength simultaneously, and, tradition holds, the finest smiths of the realm rotating through Go-Toba’s court.
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 sitePlease notify us of your intention to return, by email or fax, no later than the day after the item's arrival. Return shipping, insurance, and refund transfer fees are the customer's responsibility.
