| Displacement | 2184t standard, 2557t surface, 3564t submerged |
|---|---|
| Length | 103.8m pp, 106.95m wl, 109.3m oa |
| Width | 9.1m |
| Draught | 5.35m |
| Machinery | 2-shaft diesel and electoric motor, 11,000bhp surface, 2000shp submerged |
| Speed | 23.5kt surface, 8kt submerged |
| Armament | 8-53cm TT, 1-14cm/40cal gun, 2-25mm AA |
| Complement | 101 |
| Name | Plan | Builder | Laid down | Launch | Complete | ||
|---|---|---|---|---|---|---|---|
| I-46 | FY1942 | Sasebo NYd | 1942.11.21 | 1943. 6. 3 | 1944. 2.29 | SS1 | 1944.10.28 sunk (action, near Leyte Gulf) 1944.12. 2 missing 1945. 3.10 disc |
| I-47 | FY1942 | Sasebo NYd | 1942.11.21 | 1943. 9.29 | 1944. 7.10 | SS1 | 1945.11.30 disc 1946. 4. 1 scuttled |
| I-48 | FY1942 | Sasebo NYd | 1943. 6.19 | 1943.12.12 | 1944. 9. 5 | SS1 | 1945. 1.21 missing 1945. 1.23 sunk (action, off Ulthi) [09.45N, 138.20E] 1945. 5.10 disc |