This is a katana attributed to the Ko-Uda school, dating to the Nanbokucho period. The Uda school originated in Yamato province and later moved to Etchu province. This katana is o-suriage mumei (greatly shortened and unsigned).


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.
If, due to our fault, the item differs significantly from its proper condition, the item may be returned. Cooling-off is within one week of the item's arrival.
This is a katana attributed to the Ko-Uda school, dating to the Nanbokucho period. The Uda school originated in Yamato province and later moved to Etchu province. This katana is o-suriage mumei (greatly shortened and unsigned).


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.
If, due to our fault, the item differs significantly from its proper condition, the item may be returned. Cooling-off is within one week of the item's arrival.