| Displacement | 650t standard, 800t submerged |
|---|---|
| Length | 59.0m pp |
| Width | 6.5m |
| Draught | 4.1m |
| Machinery | 2-shaft diesel-electric, 1350bhp surface, 1700shp submerged |
| Speed | 12kt surface, 15kt submerged |
| Armament | 3-533mm TT |
| Complement | 43 |
| Number | Name | Plan | Builder | Laid down | Launch | Complete | ||
|---|---|---|---|---|---|---|---|---|
| SS-521 | Hayashio | FY1959 | Kawasaki, Kobe | 1960. 6. 6 | 1961. 7.31 | 1962. 6.30 | Submarine | (Kure district) 1962. 8. 1 (Subron1, Kure district) 1963. 3.31 (Subron1, SDF) 1965. 2. 1 (Subron1, SFlotilla1, SDF) 1977. 7.28 disc |
| SS-522 | Wakashio | FY1959 | New MHI, Kobe | 1960. 6. 7 | 1961. 8.28 | 1962. 6.30 | Submarine | (Subron1, Kure district) 1963. 3.31 (Subron1, SDF) 1965. 2. 1 (Subron1, SFlotilla1, SDF) 1979. 3.23 disc |