The , otherwise known as the , was the last armaments expansion plan of the Imperial Japanese Navy between 1930 and the start of World War II.
Background In 1939, the IJN started a new naval armaments expansion plan. It extended to 80 warships and 75 Naval Air Groups by 1.6 billion JPY.
Table of vessels Category Class Vessel number(s) Completed Converted Cancelled Training cruiser Katori #101 Kashii (#101) Minelayer Hatsutaka #102 Wakataka (#102) Combat support ship Sunosaki #103 Sunosaki (#103) Destroyer Type-B Akizuki #104–109 Akizuki (#104), Teruzuki (#105), Suzutsuki (#106), Hatsuzuki (#107), Niizuki (#108), Wakatsuki (#109) Battleship Yamato#110–111 #110 was converted to aircraft carrier #111 Aircraft carrier Shinano Shinano (#110) Destroyer Type-A Kagerō #112–114 Arashi (#112), Hagikaze (#113), Maikaze (#114), Akigumo (#115) #115 was converted from the Yūgumo class Yūgumo #115–129 Yūgumo (#116), Makigumo (#117), Kazagumo (#118), Naganami (#119), Makinami (#120), Takanami (#121), Ōnami (#122), Kiyonami (#123), Tamanami (#124), Suzunami (#126), Fujinami (#127) #115 was converted to the Kagerō class#125 was converted to the Shimakaze class#128 and #129 were dummy of naval budget of the Yamato-class battleships Destroyer Type-C Shimakaze Shimakaze (#125) Aircraft carrier Taihō #130 Taihō (#130) Seaplane tender Akitsushima #131 Akitsushima (#131) Light cruiser Type-B Agano #132–135 Agano (#132), Noshiro (#133), Yahagi (#134), Sakawa (#135) Light cruiser Type-C Ōyodo #136–137 Ōyodo (#136) #137 Cruiser submarine Type-A I-9 #138 I-11 (#138) Cruiser submarine Type-B I-15 #139–153 I-26 (#139) to I-39 (#152) #153 was dummy of naval budget of the Yamato-class battleships Large sized submarine I-176 #154–163 I-176 (#154) to I-185 (#163) Minesweeper No.19 #164–169 No.19 (#164) to No.24 (#169) Minelayer Sokuten #170–179 Hirashima (#170), Hōko (#171), Ishizaki (#172), Takashima (#173), Saishū (#174), Niizaki (#175), Yurijima (#176), Nuwajima (#177), Maeshima (#178) #179 Subchaser No.13 #180–183 No.13 (#180) to No.16 (#183) Cable layer Hashima They do not have a vessel number(s), because they were demanded as support vessels. Hashima, Tsurushima, Ōdate, Tateishi Food supply ship No.4006 No.4006 (later renamed Kinesaki) No.4007 No.4007 (later renamed Nosaki)
Notes
References Senshi Sōsho Vol. 31, Naval armaments and war preparation (1), "Until November 1941", Asagumo Simbun (Japan), November 1969
See also 1st Naval Armaments Supplement Programme (Maru 1 Keikaku, 1931) 2nd Naval Armaments Supplement Programme (Maru 2 Keikaku, 1934) 3rd Naval Armaments Supplement Programme (Maru 3 Keikaku, 1937) Temporal Naval Armaments Supplement Programme (Maru Rin Keikaku, 1940) Rapidly Naval Armaments Supplement Programme (Maru Kyū Keikaku, 1941) Additional Naval Armaments Supplement Programme (Maru Tui Keikaku, 1941) 5th Naval Armaments Supplement Programme (Maru 5 Keikaku, 1941) 6th Naval Armaments Supplement Programme (Maru 6 Keikaku, 1942) Modified 5th Naval Armaments Supplement Programme (Kai-Maru 5 Keikaku, 1942) Wartime Naval Armaments Supplement Programme (Maru Sen Keikaku, 1944) マル4計画 (ja)