| Displacement | 1070t standard, 1291t surface, 1450t submerged |
|---|---|
| Length | 76.0m pp, 78.5m wl, 79.0m oa |
| Width | 5.8m |
| Draught | 5.464m |
| Machinery | 2-shaft diesel and electoric motor, 2750bhp surface, 5000shp submerged |
| Speed | 15.8kt surface, 19kt submerged |
| Armament | 4-53cm TT, 2-25mm AA |
| Complement | 31 |
| Name | Plan | Builder | Laid down | Launch | Complete | ||
|---|---|---|---|---|---|---|---|
| I-201 | FY1944 | Kure NYd | 1944. 3. 1 | 1944. 7.22 | 1945. 2. 2 | SS1 | 1945.11.30 disc 1945 to USA, later scuttled |
| I-202 | FY1944 | Kure NYd | 144. 5. 1 | 1944. 9. 2 | 1945. 2.14 | SS1 | 1945.11.30 disc 1946. 4. 5 scuttled |
| I-203 | FY1944 | Kure NYd | 1944. 6. 1 | 1944.10.20 | 1945. 5.29 | SS1 | 1945.11.30 disc 1945 to USA, later scuttled |
| I-204 | FY1944 | Kure NYd | 1944. 8. 1 | 1944.12.16 | - | 1945. 6.22 sunk incomplete | |
| I-205 | FY1944 | Kure NYd | 1944. 9. 4 | 1945. 2.15 | - | 1948 BU incompleted | |
| I-206 | FY1944 | Kure NYd | 1944.10.27 | 1945. 3.26 | - | 1946 BU incompleted | |
| I-207 | FY1944 | Harima SB | 1944.12.27 | - | - | 1945 Cancelled | |
| I-208 | FY1944 | Harima SB | 1945. 2.17 | - | - | 1945 Cancelled | |
| I-209 | FY1944 | - | - | - | - | 1945 cancelled | |
| I-210 | FY1944 | - | - | - | - | 1945 cancelled | |
| I-211 | FY1944 | - | - | - | - | 1945 cancelled | |
| I-212 | FY1944 | - | - | - | - | 1945 cancelled | |
| I-213 | FY1944 | - | - | - | - | 1945 cancelled | |
| I-214 | FY1944 | - | - | - | - | 1945 cancelled | |
| I-215 | FY1944 | - | - | - | - | 1945 cancelled | |
| I-216 | FY1944 | - | - | - | - | 1945 cancelled | |
| I-217 | FY1944 | - | - | - | - | 1945 cancelled | |
| I-218 | FY1944 | - | - | - | - | 1945 cancelled | |
| I-219 | FY1944 | - | - | - | - | 1945 cancelled | |
| I-220 | FY1944 | - | - | - | - | 1945 cancelled | |
| I-221 | FY1944 | - | - | - | - | 1945 cancelled | |
| I-222 | FY1944 | - | - | - | - | 1945 cancelled | |
| I-223 | FY1944 | - | - | - | - | 1945 cancelled |