This kozuka is signed by Edo Iwamoto Masashige and comes with NBTHK Tokubetsu Hozon Tosogu certification. According to NBTHK, it is made of shibuichi and carved with katakiri-bori. The kozuka features a dragon theme and measures 10.2 cm x 1.9 cm x 0.5 cm.
Certificate reading — 銘 江戸岩本政重作
mei · Edo
















Iwamoto School
Edo
Signed
Tokuho (NBTHK)
Machibori · Edo
11 pieces on the market now
The Iwamoto school was a house of Edo machibori (町彫) metalworkers, founded in the early eighteenth century by Iwamoto Chūbei, a pupil of the Yokoya school, and continuing through eight generations of headmasters. As the NBTHK setsumei state repeatedly, "the Iwamoto line was originally of the Yokoya tradition," and the school's history turns on a succession crisis within that lineage: when the fifth-generation master Ryōkan died young, his junior fellow-disciple succeeded as sixth head of the Iwamoto house. Learn more →
| Smith | Era | Designated |
|---|---|---|
| Konkan昆寛 | — | 51 |
| Kanri寛利 | 1670 | 3 |
| Masakatsu政克 (Masamoto | — | 0 |
| Soei宗栄 | — | 0 |
| Ikkan一寛 | — | 0 |
A Hozon-certified fitting of notably superior craftsmanship and condition, often with signature or workmanship of high reference value.
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 site30-day refund policy. Items must be returned in original condition and packaging; customized products are non-returnable. 2-week inspection window with full item refund (shipping costs non-refundable). Customer pays return shipping.
This kozuka is signed by Edo Iwamoto Masashige and comes with NBTHK Tokubetsu Hozon Tosogu certification. According to NBTHK, it is made of shibuichi and carved with katakiri-bori. The kozuka features a dragon theme and measures 10.2 cm x 1.9 cm x 0.5 cm.
Certificate reading — 銘 江戸岩本政重作
mei · Edo
















Iwamoto School
Edo
Signed
Tokuho (NBTHK)
Machibori · Edo
11 pieces on the market now
The Iwamoto school was a house of Edo machibori (町彫) metalworkers, founded in the early eighteenth century by Iwamoto Chūbei, a pupil of the Yokoya school, and continuing through eight generations of headmasters. As the NBTHK setsumei state repeatedly, "the Iwamoto line was originally of the Yokoya tradition," and the school's history turns on a succession crisis within that lineage: when the fifth-generation master Ryōkan died young, his junior fellow-disciple succeeded as sixth head of the Iwamoto house. Learn more →
| Smith | Era | Designated |
|---|---|---|
| Konkan昆寛 | — | 51 |
| Kanri寛利 | 1670 | 3 |
| Masakatsu政克 (Masamoto | — | 0 |
| Soei宗栄 | — | 0 |
| Ikkan一寛 | — | 0 |
A Hozon-certified fitting of notably superior craftsmanship and condition, often with signature or workmanship of high reference value.
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 site30-day refund policy. Items must be returned in original condition and packaging; customized products are non-returnable. 2-week inspection window with full item refund (shipping costs non-refundable). Customer pays return shipping.