| Issuer | Japan |
| Year | 1837-1868 |
| Type | Standard circulation coin |
| Value | 1 Bu (1/4) |
| Currency | Ryō (1595-1874) |
| Composition | Silver (.991) |
| Weight | 8.66 g |
| Dimensions | |
| Thickness | 2.6 mm |
| Shape and Technique | Rectangular (irregular) Hammered, Countermarked |
| Orientation | Medal alignment ↑↑ |
| Engraver(s) | |
| In circulation to | 31 December 1888 |
| Reference(s) | C#16, JNDA#09-50, DHJ#9.80 |
| Obverse description | Incuse stamp 定 (= Jō) over 4 kanji in rectangle surrounded by 20 Sakura (cherry blosoms). Either one of the bottom row may be inverted. Bottom left 2 strokes of 是 crossed. |
| Obverse script | Chinese (traditional, regular script) |
| Obverse lettering | 定 常銀 是座 (Translation: Guaranteed Ginza (Silver Mint) Jōze (Mint Official)) |
| Reverse description | 3 vertical kanji in rectangle surrounded by 20 Sakura (cherry blosoms). Either one of the 9 bottommost may be inverted. |
| Reverse script | Chinese (traditional, regular script) |
| Reverse lettering | 一 分 銀 (Translation: 1 Bu silver) |
| Edge | Vertical reeding on short sides with 2-3 incuse stars |
| Mint | |
| Mintage | ND
(1837-1854) - Variants exist - 78 916 556 ND (1868) - 庄 stamp next to value - |
| Catalog ID | 8354938240 |
| Comments |
