| Displacement | 270t normal |
|---|---|
| Length | 36.5m pp, 38.4m wl |
| Width | 7.3m |
| Draught | 3.3m |
| Machinery | 1-shaft recipro, 60hp |
| Speed | 10kt |
| Armament | 1-16cm muzzle loader gun, 1-14cm gun |
| Complement | 65 |
| Name | Plan | Builder | Laid down | Launch | Complete | ||
|---|---|---|---|---|---|---|---|
| Unyo | - | UK A.Hall | 1868 | 1868 | 1870. 7 | Choshu clan Unyo-Maru | 1870 presented 1871.11.29 renamed(Unyo) 1876.10.31 lost (off Adaura, Wakayama) |