4th Naval Armaments Supplement Programme

{{Short description|Final of four Imperial Japanese Naval Expansion plans}}

The {{nihongo|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

class="wikitable" width="90%"

| width="12%" | Category

| width="6%" | Class

| width="8%" | Vessel number(s)

| width="20%" | Completed

| width="16%" | Converted

| width="12%" | 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

| rowspan="2"|#110–111

|

| #110 was converted to aircraft carrier

| #111

Aircraft carrier

| Shinano

| Shinano (#110)

|

rowspan="2"|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