Type C submarine

The Cruiser submarine Type-C (巡潜丙型潜水艦, Junsen Hei-gata sensuikan) 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.

The Type-C submarines were divided into three classes:

• Type-C (丙型（伊十六型）, Hei-gata, I-16-class)
• Type-C Mod. (丙型改（伊五十二型）, Hei-gata Kai, I-52-class)
• Type V22B (第379号艦型, Dai-379-Gō kan-gata, Vessel number 379-class). However, the Vessel number 379-class was never built.

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

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 Type E submarine [ja] (戊型潜水艦, Bo-gata sensuikan) which was to become the primary submarine in 1945.

• Boats in class

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 late 1943, because the IJN was planning to build the Type E submarine [ja] (戊型潜水艦, Bo-gata sensuikan).

• Boats in class

• "Rekishi Gunzō"., History of Pacific War Vol.17 I-Gō Submarines, Gakken (Japan), January 1998,ISBN 4-05-601767-0
• Rekishi Gunzō, History of Pacific War Vol.35 Kō-hyōteki and Kōryū, Gakken (Japan), April 2002,ISBN 4-05-602741-2
• Rekishi Gunzō, History of Pacific War Vol.36 Kairyū and Kaiten, Gakken (Japan), May 2002,ISBN 4-05-602693-9
• Rekishi Gunzō, History of Pacific War Extra, "Perfect guide, The submarines of the Imperial Japanese Forces", Gakken (Japan), March 2005,ISBN 4-05-603890-2
• Model Art Extra No.537, Drawings of Imperial Japanese Naval Vessels Part-3, Model Art Co. Ltd. (Japan), May 1999, Book code 08734-5
• The Maru Special, Japanese Naval Vessels No.31 Japanese Submarines I, Ushio Shobō (Japan), September 1979, Book code 68343-31

• Cruiser submarine