| Classe: KD6 A Kaidai | |
| Statistics: | Displacement: 1 785 tons Length: 105 meters Speed: 23 knots 1 x 100 mm gun |
| Date | Incident | Battle | Place |
| June 14, 1934 | Launched | Japan, ocean going submarine, christened I 70. | Japan |
| November 9, 1935 | Commissioned | - | Japan |
| December 7, 1941 | - | Pearl Harbour. | Hawaii |
| December 10, 1941 | Sunk | sunk by the Enterprise. | Hawaii |
| Date | Incident | Battle | Place |
| June 20, 1935 | Launched | Japan, ocean going submarine, christened I 72. | Japan |
| January 7, 1937 | Commissioned | - | Japan |
| December 7, 1941 | - | Pearl Harbour. | Hawaii |
| May 20, 1942 | - | christened I 172. | Japan |
| November 10, 1942 | Sunk | sunk by the Southard. | Salomon Islands |
| Date | Incident | Battle | Place |
| June 20, 1935 | Launched | Japan, ocean going submarine, christened I 73. | Japan |
| January 7, 1937 | Commissioned | - | Japan |
| December 7, 1941 | - | Pearl Harbour. | Hawaii |
| January 27, 1942 | Sunk | sunk by the Gudgeon. | Hawaii |
| Date | Incident | Battle | Place |
| June 26, 1933 | Launched | Japan, ocean going submarine, christened I 68. | Japan |
| July 31, 1934 | Commissioned | - | Japan |
| December 7, 1941 | - | Pearl Harbour. | Hawaii |
| June 5, 1942 | Damaged | Midway: the battle and the diversions, sunk by the Monaghan II, Gwin III, Hughues. | Hawaii |
| July 27, 1943 | Sunk | sunk by the Scamp. | New Britain |
| Date | Incident | Battle | Place |
| February 15, 1934 | Launched | Japan, ocean going submarine, christened I 69. | Japan |
| September 28, 1935 | Commissioned | - | Japan |
| December 7, 1941 | - | Pearl Harbour. | Hawaii |
| June 4, 1942 | - | Midway: the battle and the diversions. | Hawaii |
| April 4, 1944 | Sunk | - | Carolina archipelago |
| Date | Incident | Battle | Place |
| August 25, 1934 | Launched | Japan, ocean going submarine, christened I 71. | Japan |
| December 25, 1935 | Commissioned | - | Japan |
| December 7, 1941 | - | Pearl Harbour. | Hawaii |
| May 20, 1942 | - | christened I 171. | Japan |
| June 4, 1942 | - | Midway: the battle and the diversions. | Hawaii |
| February 1, 1944 | Sunk | sunk by the Guest, Hudson. | New Britain |