| Displacement | 330t standard |
|---|---|
| Length | 45.7m |
| Width | 8.6m |
| Draught | 2.3m |
| Machinery | 2-shaft diesel, 1200bhp |
| Speed | 14kt |
| Armament | 1-20mm MGs |
| Complement | 40 |
| Number | Name | Plan | Builder | Laid down | Launch | Complete | ||
|---|---|---|---|---|---|---|---|---|
| MST-473 | Kozu | FY1958 | NKK, Tsurumi | 1959. 3.24 | 1959.11.12 | 1960. 2.26 | Minesweeper (MSC-609) | (Yokosuka district) 1960. 3. 1 (MSron33, MSFlotilla1) 1961. 9. 1 (MSron33, MSFlotilla2, SDF) 1972. 7. 1 MS Tender boat (MST-473) (MSron101, Kure district) 1981. 3.18 disc |
| MST-474 | Otsu | FY1963 | NKK, Tsurumi | 1964. 3. 7 | 1964.11. 5 | 1965. 2.24 | Minesweeper (MSC-621) | (MSron36, MSFlotilla2, SDF) 1976.11.18 (MSron44, MSFlotilla2, SDF) 1981. 3.16 MS Tender boat (MST-474) (MSron101, Kure district) 1986.12.16 disc |