| Displacement | 1575t standard, 1705t surface, 2330t submerged |
|---|---|
| Length | 90.5m pp, 95.4m wl, 97.7m oa |
| Width | 8.2m |
| Draught | 4.70m |
| Machinery | 2-shaft diesel and electoric motor, 6000bhp surface, 1800shp submerged |
| Speed | 20.5kt surface, 8.2kt submerged |
| Armament | 6-53cm TT, 1-8m/50cal gun, 1-13.2mm MG |
| Complement | 70 - 82 |
| Name | Plan | Builder | Laid down | Launch | Complete | ||
|---|---|---|---|---|---|---|---|
| I-65 (I-165) | FY1927 | Kure NYd | 1929.12.19 | 1931. 6. 2 | 1932.12. 1 | SS1 | 1942. 5.20 renamed (I-165) 1945. 6.27 sunk (air attack, E of Saipan) [15.28N, 153.39E] 1945. 7.29 missing 1945. 9.15 disc |
| I-66 (I-166) | FY1927 | Sasebo NYd | 1929.11. 8 | 1931. 6. 2 | 1932.11.10 | SS1 | 1942. 5.20 renamed (I-166) 1944. 7.17 sunk (torpedoed, Malacca Strait) [01.10N, 103.45E] 1944. 9.10 disc |
| I-67 | FY1927 | Mitsubishi, Kobe | 1929.10.14 | 1931. 4. 7 | 1932. 8. 8 | SS1 | 1940. 8.29 lost (accident, off Marcus I.) 1940.11. 1 disc |