| Issuer | Japan |
| Year | 2010 |
| Type | Circulating commemorative coins |
| Value | 500 Yen |
| Currency | Yen (1871-date) |
| Composition | Bimetallic: copper-nickel centre in nickel brass ring (75% Copper, 12.5% Zinc, 12.5% Nickel) |
| Weight | 7.1 g |
| Dimensions | 26.5 mm |
| Thickness | 1.8 mm |
| Shape and Technique | Round Milled |
| Orientation | Medal alignment ↑↑ |
| Engraver(s) | |
| In circulation to | |
| Reference(s) | Y#159, JNDA#07-108 |
| Obverse description | Portrait of Sakamoto Ryoma (Japanese prominent figure in the movement to overthrow the Tokugawa shogunate in bakumatsu Japan) |
| Obverse script | |
| Obverse lettering | 日 本 国 KOCHI 高知県 五 百 円 (Translation: State of Japan Kochi 500 yen) |
| Reverse description | Old cast Mon coin with latent images in square hole surrounded by legends |
| Reverse script | |
| Reverse lettering | JAPAN 47 PREFECTURES COIN PROGRAM 地 方(47/60)自 治 500 YEN 平成 22 年 (Translation: Local autonomy Year 22 of Heisei) |
| Edge | Slanted reeding with two different pitches |
| Mint | |
| Mintage | 22 (2010) - - 1 930 000 22 (2010) - Proof - 30 000 |
| Catalog ID | 5361401540 |
| Comments |
