| Displacement | 600t normal, 700t full load |
|---|---|
| Length | 49.1m pp, 49.7m wl |
| Width | 7.3m |
| Draught | ? |
| Machinery | 2-shaft recipro, 100nhp |
| Speed | 6kt |
| Armament | 12 gun |
| Complement | ? |
| Name | Plan | Builder | Laid down | Launch | Complete | ||
|---|---|---|---|---|---|---|---|
| Kanrin-Maru | - | Net Fop Smit | ? | 1856 | ? | Tokugawa navy | 1868. 9.18 captured 1869. 8.29 to Cultivation agency |
| Choyo-Maru | - | Net Gips & Sons | ? | 1858 | 1858. 7 | Tokugawa navy | 1868. 4.28 captured 1869. 5.11 sunk (action, off Hakodate) |