4th Naval Armaments Supplement Programme
# 4th Naval Armaments Supplement Programme

The 4th Naval Armaments Supplement Program (マル4計画, 第四次海軍軍備充実計画, Maru 4 Keikaku, Dai-Yo-Ji Kaigun Gunbi Jūjitsu Keikaku) was one of the armaments expansion plan of the Imperial Japanese Navy (IJN).

## Background

In 1939, the IJN started 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 | #110–111 | Shinano (#110) | | |
| Destroyer Type-A | Kagerō | #112–114 | Arashi (#112), Hagikaze (#113), Maikaze (#114), Akigumo (#115) | #115 was converted from the Yūgumo class | |
| Destroyer Type-A | 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 | | Hashima, Tsurushima, Ōdate, Tateishi | | |
| Food supply ship | No.4006 | | No.4006 (later renamed Kinesaki) | | |
| Food supply ship | No.4007 | | No.4007 (later renamed Nosaki) | | |
