| Displacement | 2095t standard, 2564t surface, 3644t submerged |
|---|---|
| Length | 102.4m pp, 106.9m wl, 108.7m oa |
| Width | 9.3m |
| Draught | 5.12m |
| Machinery | 2-shaft diesel and electoric motor, 4700bhp surface, 1200shp submerged |
| Speed | 17.7kt surface, 6.5kt submerged |
| Range | 21000nm by 16kt |
| Armament | 6-53cm TT, 2-14cm/40cal gun, 2-25mm AA |
| Complement | 101 |
| Name | Plan | Builder | Laid down | Launch | Complete | ||
|---|---|---|---|---|---|---|---|
| I-52 | FY1941 | Kure NYd | 1942. 3.18 | 1942.11.10 | 1943.12.28 | SS1 | 1944. 6.24 sunk (air attack, Bay of Biscay) [15.16N, 39.55W] 1944. 8. 2 missing 1944.12.10 disc |
| I-53 | FY1941 | Kure NYd | ? | 1943 | 1944. 2.20 | SS1 | 1945.11.30 disc 1946. 4. 1 scuttled |
| I-55 | FY1941 | Kure NYd | ? | 1943 | 1944. 4.20 | SS1 | 1944. 7.28 missing (Tinian area) [14.26N, 152.16E] 1944.10.15 disc |
| I-57 | FY1942 | Kure NYd | - | - | - | 1943 cancelled | |
| I-59 | FY1942 | Kure NYd | - | - | - | 1943 cancelled |