Tenshō Ōban
天正大判（Tenshō ōban）
- Series
- Ōban (10-ryō plates)
- Denomination
- 10 ryō (largely ceremonial/presentation use)
- Period
- Late 16th century (Toyotomi period)
Updated: 2026-09-02
Canonical Specifications
| Item | Value | Type | Sources |
|---|---|---|---|
| Fineness & weight (catalog) | 70〜76% / 約165g | Catalog value | [1] |
FACTThe Currency Museum catalog lists a fineness range of 70–76% and a weight of about 165 g ("10 ryō"). The catalog gives no single minting year.[1]
FACTThe catalog describes a large oval gold plate bearing ink inscriptions (a "casting-into-molds" narrative has no basis; our own earlier text was corrected on 2026-09-02).[1]
Historical Context & Lineage
FACTThe canonical Edo-period ōban lineage comprises five types — Keichō, Genroku, Kyōhō, Tenpō and Man'en. ("Meiwa Ōban" and "Kaei Ōban" have no confirmed basis as independent types and are blocked as rejected entities on this site.)[2]
Authentication Cautions
INTERPRETATIONNo single feature is known to prove authenticity. Ink inscriptions were customarily rewritten, so their condition is assessed separately from authenticity. Third-party grades assess condition, not historical attribution.
Known Scholarly Issues
INTERPRETATIONWeight, mintage, surviving population and the identity of the ink-inscription writers are not yet confirmed in the consulted sources; they will be added as sources are obtained.
Auction Records
No auction records confirmed for this exact coin type yet. Category-wide median prices are not shown as if they were prices for this type. Once confirmed, records will be listed here with auction house, sale, date, lot, grade, realized price (hammer vs. total), source URL, and review date.
References
- [1]「貨幣博物館 常設展示図録（天正大判）」（日本銀行金融研究所 貨幣博物館） — https://www.imes.boj.or.jp/cm/collection/tenjizuroku/mod/book/pageindices/index47.html（accessed: 2026-09-02）
- [2]「貨幣博物館 常設展示図録（江戸の大判）」（日本銀行金融研究所 貨幣博物館） — https://www.imes.boj.or.jp/cm/collection/tenjizuroku/mod/book/pageindices/index48.html（accessed: 2026-09-02）