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Chōgin 'Bunsei Chōgin' 6 stamps
| Issuer | Japan |
|---|---|
| Year | 1820-1837 |
| Type | Log in to see details |
| Value | Log in to see details |
| Currency | Monme Silver / Monme-Gin / Ginme (1601-1874) |
| Composition | Log in to see details |
| Weight | Log in to see details |
| Diameter | Log in to see details |
| Thickness | Log in to see details |
| Shape | Log in to see details |
| Technique | Log in to see details |
| Orientation | Log in to see details |
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| In circulation to | Log in to see details |
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| Obverse description | Log in to see details |
|---|---|
| Obverse script | Japanese (Kanji) |
| Obverse lettering | Log in to see details |
| Reverse description | Log in to see details |
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| Reverse lettering | Log in to see details |
| Edge | Plain |
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| Mintage | Log in to see details |
| Additional information |
The Bunsei Chōgin was issued following the currency reforms of 1820 under the Tokugawa shogunate, part of a broader effort to debase the coinage and replenish depleted bakufu finances. The silver content dropped sharply from earlier issues — the Genbun and Hōreki Chōgin had already set a downward trend, but the Bunsei represents a notable further reduction in fineness. Six verifying stamps indicate this piece passed through the official re-evaluation and stamping process conducted by the za assayers in Edo and Kyoto.
Chōgin circulated by weight rather than by count, which made the declining silver content a slow-burn fraud on merchants who lacked reliable testing equipment.