| Issuer | Japan |
| Year | 1824-1830 |
| Type | Standard circulation coin |
| Value | 1/8 Ryō |
| Currency | Ryō (1595-1874) |
| Composition | Silver (.978) |
| Weight | 7.53 g |
| Dimensions | |
| Thickness | 2.2 mm |
| Shape and Technique | Rectangular (irregular) Hammered, Countermarked |
| Orientation | Medal alignment ↑↑ |
| Engraver(s) | |
| In circulation to | 31 December 1888 |
| Reference(s) | C#13a, JNDA#09-48, DHJ#9.75 |
| Obverse description | Ten kanji in pearl border, reading `以南鐐八片 換小判一兩` |
| Obverse script | Chinese (traditional, regular script) |
| Obverse lettering | 換以 小南 判鐐 一八 兩片 (Translation: Take eight pieces Nanryō to exchange for one ryō koban) |
| Reverse description | A Fundō (symbol for official weight) with an incuse stamp 定 to the left of it over 4 kanji surrounded by pearl border. |
| Reverse script | Chinese (traditional, regular script) |
| Reverse lettering | 定 常銀 是座 (Translation: Guaranteed Ginza (Silver Mint) Jōze (Mint Official)) |
| Edge | Vertical reeding on short sides |
| Mint | |
| Mintage | ND
(1824-1830) - - 60 624 000 |
| Catalog ID | 9774901370 |
| Comments |
