| Displacement | 103t surface, 124t submerged |
|---|---|
| Length | 18.3m pp, 20.4m oa |
| Width | 3.6m |
| Draught | 3.1m |
| Machinery | 1-shaft gasoline/electric motor, 180bhp surface, 70shp submerged |
| Fuel | gasoline 2t |
| Speed | 8kt surface, 7kt submerged |
| Range | 184nm by 8kt surface, 8nm by 7kt submerged |
| Armament | 1-45cm TT (2 torpedoes) |
| Complement | 13 |
| Name | Plan | Builder | Laid down | Launch | Complete | ||
|---|---|---|---|---|---|---|---|
| SS-1 | FY1904 | USA Electoric Boat /Yokosuka NYd | 1904.11.30 | 1905. 3.20 | 1905. 8. 1 | TBS | 1905.12.12 SB 1916. 8. 4 SB2 1919. 4. 1 SS3 1921. 4.30 disc |
| SS-2 | FY1904 | USA Electoric Boat /Yokosuka NYd | 1904.12. 1 | 1905. 5. 2 | 1905. 9. 5 | TBS | 1905.12.12 SB 1916. 8. 4 SB2 1919. 4. 1 SS3 1921. 4.30 disc |
| SS-3 | FY1904 | USA Electoric Boat /Yokosuka NYd | 1904.11.30 | 1905. 5.16 | 1905. 9. 5 | TBS | 1905.12.12 SB 1916. 8. 4 SB2 1919. 4. 1 SS3 1921. 4.30 disc |
| SS-4 | FY1904 | USA Electoric Boat /Yokosuka NYd | 1904.12. 4 | 1905. 5.27 | 1905.10. 1 | TBS | 1905.12.12 SB 1916. 8. 4 SB2 1919. 4. 1 SS3 1921. 4.30 disc |
| SS-5 | FY1904 | USA Electoric Boat /Yokosuka NYd | 1904.12. 4 | 1905. 5.13 | 1905.10. 1 | TBS | 1905.12.12 SB 1916. 8. 4 SB2 1919. 4. 1 SS3 1921. 4.30 disc |