This is an incredibly large, well-made, and well-preserved katana from the Ko-Mihara school of Yamato, dating to the late Kamakura period. It is accompanied by a 41st Juyo paper, indicating its high quality and historical significance.
Ko-Mihara · Late Kamakura (c. 1278) · nagasa 70cm





Yamato-den · Bingo
9 pieces on the market now
Bingo province, and the town of Mihara on the Numata river within it, gives this school its name. The Mihara group arose at the close of the Kamakura period and worked on through the Nanbokucho years, and the published sources gather the work of that early phase under the collective name Ko-Mihara, reserving Sue-Mihara for the late-Muromachi continuation of the line. Learn more →
| Smith | Era | Designated |
|---|---|---|
| Masahiro正廣 | 1362-1389 | 33 |
| Masaie正家 | 1353-1375 | 29 |
| Kaneyasu兼安 | 1352-1369 | 12 |
| Masanobu正信 | 1376-1394 | 4 |
| Masaie正家 | 1312-1317 | 0 |
A blade of top-grade workmanship and condition, formally judged to rank with a nationally recognized Important Art Object (Jūyō Bijutsuhin). Awarded only at the NBTHK’s competitive annual examination.
Of Japan’s roughly 2.5 million registered swords, only 12,307 (about 1 in 203) have ever attained Jūyō.
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 the item fails to meet the description, it may be eligible for a return (at the seller's discretion). Item(s) must be shipped back only via FedEx or UPS within 48 hours of receipt, in original undamaged state. Costs are the purchaser's responsibility.
This is an incredibly large, well-made, and well-preserved katana from the Ko-Mihara school of Yamato, dating to the late Kamakura period. It is accompanied by a 41st Juyo paper, indicating its high quality and historical significance.
Ko-Mihara · Late Kamakura (c. 1278) · nagasa 70cm





Yamato-den · Bingo
9 pieces on the market now
Bingo province, and the town of Mihara on the Numata river within it, gives this school its name. The Mihara group arose at the close of the Kamakura period and worked on through the Nanbokucho years, and the published sources gather the work of that early phase under the collective name Ko-Mihara, reserving Sue-Mihara for the late-Muromachi continuation of the line. Learn more →
| Smith | Era | Designated |
|---|---|---|
| Masahiro正廣 | 1362-1389 | 33 |
| Masaie正家 | 1353-1375 | 29 |
| Kaneyasu兼安 | 1352-1369 | 12 |
| Masanobu正信 | 1376-1394 | 4 |
| Masaie正家 | 1312-1317 | 0 |
A blade of top-grade workmanship and condition, formally judged to rank with a nationally recognized Important Art Object (Jūyō Bijutsuhin). Awarded only at the NBTHK’s competitive annual examination.
Of Japan’s roughly 2.5 million registered swords, only 12,307 (about 1 in 203) have ever attained Jūyō.
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 the item fails to meet the description, it may be eligible for a return (at the seller's discretion). Item(s) must be shipped back only via FedEx or UPS within 48 hours of receipt, in original undamaged state. Costs are the purchaser's responsibility.