| Displacement | 400t standard |
|---|---|
| Length | 62m oa |
| Width | 9.4m |
| Draught | 2.0m |
| Machinery | 2-shaft diesel, 5500ps |
| Speed | 20kt |
| Armament | none |
| Complement | 29 |
| Number | Name | Plan | Builder | Laid down | Launch | Complete | ||
|---|---|---|---|---|---|---|---|---|
| ASY-91 | Hashidate | FY1997 | Hitachi, Kanagawa | 1998.10.28 | 1999. 7.26 | 1999.11.30 | Auxiliary Service boat | (Yokosuka guard, Yokosuka district) |