The was one of the first classes of submarine in the Imperial Japanese Navy (IJN) to serve during the Second World War. Type-C submarines were better armed than the Type-A and Type-B. The Type-Cs were also utilized as Kō-hyōteki or Kaiten mother ships, for this reason they were not equipped with aviation facilities. Class variants The Type-C submarines were divided into three classes: . However, the Vessel number 379-class was never built. Type-C (I-16 class) Project number S38 and S38B (Latter batch). They were based on the I-7 class. Eight boats were built between 1937 and 1944 under the Maru 3 Programme (Boats 44 - 48) and the Maru Kyū Programme (Boats 376 - 378). Boats in class Type-C Mod. (I-52 class) Project number S37D. Twenty boats were planned under the Maru Tsui Programme (Boats 625 - 632) and the Kai-Maru 5 Programme (Boats 5141 - 5155). According to their Project number, they were one of the variants of the Type-B submarine. Seventeen boats were cancelled in late 1943, because the IJN was planning to build the which was to become the primary submarine in 1945. Boats in class {| class="wikitable" | width="4%" | Boat No. | width="3%" | Boat | width="10%" | Builder | width="5%" | Laid down | width="5%" | Launched | width="5%" | Completed | width="25%" | Results | width="20%" | Fate |- | 625 | | Kure Naval Arsenal | 18-03-1942 | 10-11-1942 | 28-12-1943 | | Sunk by aircraft from west of Cap-Vert at on 24-06-1944. |- | 626 | | Kure Naval Arsenal | 15-05-1942 | 24-12-1942 | 20-02-1944 | Damaged 21-07-1945 by Kaiten.Sank on 24-07-1945 by Kaiten.Damaged on 04-08-1945 by Kaiten. | Converted to a Kaiten mother ship in July 1944. Decommissioned on 30-11-1945, sunk as a target off the Gotō Islands on 01-04-1946. |- | 628 | | Kure Naval Arsenal | 15-06-1942 | 20-04-1943 | 20-04-1944 | | Sunk by , and aircraft from east of the Mariana Islands on 28-07-1944.<ref>This is one opinion, because this conflicts with I-55s action records.</ref> |- | 630632 | I-57I-59 | | | | | | rowspan="2"|Cancelled in 1943. |- | 5141 - 5155 | | | | | | |- |} Type V22B Project number S49B'''. Twenty eight boats were planned under the Maru Kyū Programme (Boats 379 - 381) and the Kai-Maru 5 Programme (Boats 5156 - 5180). All boats were cancelled in