This is a katana signed Bizen Koku Ju Osafune Sukesada, dated August 1513. The blade is ranked as Jyo Saku for works by Osafune Sukesada, though the signature is not guaranteed. It comes with a koshirae that has a NBTHK Hozon Tosogu certificate.





Bizen-den · Bizen
71 pieces on the market now
Sukesada (祐定) is the great name of late-Muromachi Osafune, the most prosperous of the Bizen forges that scholars group together as Sue-Bizen. The signature was carried by a body of smiths so large that the early-modern reference Hayami-dashi lists as many as twenty-one who appended a zokumyo (common name) to distinguish themselves, and the published commentary is blunt that of all the late-Osafune families the Sukesada line was the largest and most productive. Two registers of work issue from this single name. Learn more →
| Smith | Era | Designated |
|---|---|---|
| Sukesada祐定 | 1504-1551 | 72 |
| Sukesada祐定 | 1532-1583 | 18 |
| Sukesada祐定 | 1547-1592 | 8 |
| Sukesada祐定 | 1487-1521 | 5 |
| Sukesada祐定 | 1532-1573 | 3 |
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 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.
This is a katana signed Bizen Koku Ju Osafune Sukesada, dated August 1513. The blade is ranked as Jyo Saku for works by Osafune Sukesada, though the signature is not guaranteed. It comes with a koshirae that has a NBTHK Hozon Tosogu certificate.





Bizen-den · Bizen
71 pieces on the market now
Sukesada (祐定) is the great name of late-Muromachi Osafune, the most prosperous of the Bizen forges that scholars group together as Sue-Bizen. The signature was carried by a body of smiths so large that the early-modern reference Hayami-dashi lists as many as twenty-one who appended a zokumyo (common name) to distinguish themselves, and the published commentary is blunt that of all the late-Osafune families the Sukesada line was the largest and most productive. Two registers of work issue from this single name. Learn more →
| Smith | Era | Designated |
|---|---|---|
| Sukesada祐定 | 1504-1551 | 72 |
| Sukesada祐定 | 1532-1583 | 18 |
| Sukesada祐定 | 1547-1592 | 8 |
| Sukesada祐定 | 1487-1521 | 5 |
| Sukesada祐定 | 1532-1573 | 3 |
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 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.