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| 正面描述 | Irregular rectangular hammered silver flan with a deeply impressed rectangular inner border. Within the central field, three vertical columns of Kanji characters are arranged in relief: the uppermost character 定 (Guarantee/Official), flanked below by 常銀 (Joze Gin, meaning Guaranteed Silver) on the left and 是座 (Kore-za, referring to the Ginza mint authority) on the right. The border is decorated with a continuous row of small incuse six-petalled floral (cherry blossom) stamps along all four sides, a characteristic feature of Ansei-period Bu coinage. The overall surface shows the hand-worked texture typical of Edo-period hammered silver coinage. |
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| 正面文字 | 登录 以查看详情 |
| 正面铭文 | 登录 以查看详情 |
| 背面描述 | 登录 以查看详情 |
| 背面文字 | 登录 以查看详情 |
| 背面铭文 | 登录 以查看详情 |
| 边缘 | Reeded with incuse stars on short sides |
| 铸币厂 | 登录 以查看详情 |
| 铸造量 | 登录 以查看详情 |
| 附加信息 |
The Bu Gin series was minted in direct response to the forced opening of Japanese ports under the Harris Treaty of 1858, which created an immediate crisis: foreign merchants discovered they could exploit the official gold-to-silver exchange rate and drain Japan's gold reserves through arbitrage. The Shogunate debased the silver coinage to close the gap, and the Ansei Bu — named for the era — was the instrument of that adjustment. It circulated through the final convulsions of Tokugawa rule, surviving into the Meiji transition before being demonetized.
The .873 fineness reflects a deliberate reduction from earlier Bu coinage, a compromise the Shogunate's finance officials calculated would neutralize foreign arbitrage without triggering domestic panic.