Originally from Yamato Province, Uda District (Nara), they migrated to Etchu (Toyama). This katana is appraised as a Ko-Uda work from the late Kamakura period. The jigane is a ko-mokume-hada mixed with masame-hada, exhibiting midare-utsuri throughout, which expresses the great age of the sword's era. The hamon is a nie-deki gunome-midare, with choji-no-ashi entering the temper line. The interior of the ha is extremely active, displaying numerous kinsuji; it is a magnificent example for those who wish to study kinsuji. Near the hamachi, it shows a superb spiral kinsuji-like activity, to the extent that it could be mistaken for a sword of the Soden Bizen Osafune Chogi school. The horimono reflects the Soshu-den style, with futasuji-hi carved down to the center due to suriage, allowing one to feel the breath of that era. Please enjoy this extremely old meito, designated as a Ko-Uda work of the Kamakura period.



















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. Learn more →
| Smith | Era | Designated |
|---|---|---|
| Ko-Uda古宇多 | 1310-1360 | 51 |
| Kunifusa國房 | 1368-1375 | 17 |
| Kunimitsu國光 | 1362-1368 | 9 |
| Tomonori友則 | 1390-1394 | 4 |
| Kunitsugu國次 | 1356-1361 | 1 |
We could not find an authenticity certificate on the seller’s listing. Japanese swords and fittings are normally papered by the NBTHK (or the NTHK). Without one, the attribution is the seller’s own assessment and has not been independently verified — treat it with caution and ask the dealer about certification before buying.
For returns due to customer circumstances, the cost is the customer's responsibility. For returns due to our mis-shipment or a defective item, we bear the cost.
Originally from Yamato Province, Uda District (Nara), they migrated to Etchu (Toyama). This katana is appraised as a Ko-Uda work from the late Kamakura period. The jigane is a ko-mokume-hada mixed with masame-hada, exhibiting midare-utsuri throughout, which expresses the great age of the sword's era. The hamon is a nie-deki gunome-midare, with choji-no-ashi entering the temper line. The interior of the ha is extremely active, displaying numerous kinsuji; it is a magnificent example for those who wish to study kinsuji. Near the hamachi, it shows a superb spiral kinsuji-like activity, to the extent that it could be mistaken for a sword of the Soden Bizen Osafune Chogi school. The horimono reflects the Soshu-den style, with futasuji-hi carved down to the center due to suriage, allowing one to feel the breath of that era. Please enjoy this extremely old meito, designated as a Ko-Uda work of the Kamakura period.



















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. Learn more →
| Smith | Era | Designated |
|---|---|---|
| Ko-Uda古宇多 | 1310-1360 | 51 |
| Kunifusa國房 | 1368-1375 | 17 |
| Kunimitsu國光 | 1362-1368 | 9 |
| Tomonori友則 | 1390-1394 | 4 |
| Kunitsugu國次 | 1356-1361 | 1 |
We could not find an authenticity certificate on the seller’s listing. Japanese swords and fittings are normally papered by the NBTHK (or the NTHK). Without one, the attribution is the seller’s own assessment and has not been independently verified — treat it with caution and ask the dealer about certification before buying.
For returns due to customer circumstances, the cost is the customer's responsibility. For returns due to our mis-shipment or a defective item, we bear the cost.