Nanryō Nishu-gin
南鐐二朱銀（nanryō nishu-gin） ・ aka: 明和南鐐二朱銀
- Series
- Counted silver coinage denominated in gold units
- Denomination
- 2 shu (8 pieces = 1 koban ryō)
- Period
- Issued 1772 (Meiwa 9)
Updated: 2026-09-02
Canonical Specifications
| Item | Value | Type | Sources |
|---|---|---|---|
| Fineness (catalog) | 98% / 1772年 | Catalog value | [1] |
| Denomination (8 = 1 ryō inscription) | 二朱 | Catalog value | [2] |
FACTThe Currency Museum catalog lists 98% fineness (rounded) and the year 1772. "Nanryō" denotes high-grade silver.[1]
FACTThe Bank of Japan's history describes it as counted money denominated in gold units, its face bearing the statement that eight pieces exchange for one koban ryō — fixing the denomination at 1/8 ryō = 2 shu.[2]
Historical Context
FACTIt marks the turn from weighed silver (chōgin, mameitagin) to counted silver denominated in gold units, following the Meiwa Gomonmegin of 1765.[2]
Authentication Cautions
INTERPRETATIONNo single feature is known to prove authenticity; third-party grades assess condition, not historical attribution.
Known Scholarly Issues
INTERPRETATIONWeight, mintage, and the distinction from the Bunsei-era nanryō issues are not yet confirmed in the consulted sources.
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（江戸の銀貨・後期）」（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/index50.html（accessed: 2026-09-02）
- [2]「日本貨幣史（本文）」（日本銀行金融研究所 貨幣博物館） — https://www.imes.boj.or.jp/cm/history/content/index.html（accessed: 2026-09-02）