View source for Rapid Naval Armaments Supplement Programme

{{Short description|Armament expansion plan of the Imperial Japanese Navy (IJN) in 1941}}
The {{nihongo|'''Rapid Naval Armaments Supplement Programme'''|マル急計画, 出師準備第一着作業建艦計画|Maru Kyū Keikaku, Suishi-Junbi Dai-Ichi Chakusagyō Kenkan Keikaku}} was one of the armaments expansion plan of the [[Imperial Japanese Navy]] (IJN).

==Background==
In August 1941, the IJN started building warships for war. It extended to 293 vessels, 300,000 tons.

==Table of vessels==
{| class="wikitable" width="90%"
| width="12%" | '''Category'''
| width="8%" | '''Class'''
| width="8%" | '''Vessel number(s)'''
| width="20%" | '''Completed'''
| width="15%" | '''Converted'''
| width="12%" | '''Cancelled'''
|-
| Heavy cruiser
| ''[[Japanese cruiser Ibuki (1943)|Ibuki]]''
| #300 - 301
| 
| #300 was converted to aircraft carrier
| #301
|-
| Aircraft carrier
| ''[[Unryū class aircraft carrier|Unryū]]''
| #302
| ''[[Japanese aircraft carrier Unryū|Unryū]]'' (#302)
| 
| 
|-
| Seaplane tender
| ''[[Japanese seaplane tender Akitsushima|Akitsushima]]''
| #303
| 
| 
| #303 
|-
| rowspan="2"|Fleet oiler
| ''[[Japanese fleet oiler Kazahaya|Kazahaya]]''
| #304 - 307
| ''Kazahaya'' (#304)
| #306 was converted to the ''Hayasui'' class
| #305, 307
|-
| ''[[Japanese fleet oiler Hayasui|Hayasui]]''
| 
| ''Hayasui'' (#306)
| 
| 
|-
| Escort ship Type-A
| ''[[Etorofu class escort ship|Etorofu]]''
| #310 - 339
| ''[[Japanese escort ship Etorofu|Etorofu]]'' (#310), ''[[Japanese escort ship Matsuwa|Matsuwa]]'' (#311), ''[[Japanese escort ship Sado|Sado]]'' (#312), ''[[Japanese escort ship Oki|Oki]]'' (#313), ''[[Japanese escort ship Mutsure|Mutsure]]'' (#314), ''[[Japanese escort ship Iki|Iki]]'' (#315), ''[[Japanese escort ship Tsushima|Tsushima]]'' (#316), ''[[Japanese escort ship Wakamiya|Wakamiya]]'' (#317), ''[[Japanese escort ship Hirado|Hirado]]'' (#318), ''[[Japanese escort ship Fukae|Fukae]]'' (#319), ''[[Japanese escort ship Amakusa|Amakusa]]'' (#321), ''[[Japanese escort ship Manju|Manju]]'' (#323), ''[[Japanese escort ship Kanju|Kanju]]'' (#325), ''[[Japanese escort ship Kasado|Kasado]]'' (#330)
| #320, #322, #324, #326 - 329 and #331 - 339 were converted to the ''Mikura'' class
| 
|-
| rowspan="3"|Escort ship Type-B
| ''[[Mikura class escort ship|Mikura]]''
| 
| ''[[Japanese escort ship Mikura|Mikura]]'' (#320), ''[[Japanese escort ship Miyake|Miyake]]'' (#322), ''[[Japanese escort ship Awaji|Awaji]]'' (#324), ''[[Japanese escort ship Nōmi|Nōmi]]'' (#326), ''[[Japanese escort ship Kurahashi|Kurahashi]]'' (#327), ''[[Japanese escort ship Chiburi|Chiburi]]'' (#329), ''[[Japanese escort ship Yashiro|Yashiro]]'' (#331), ''[[Japanese escort ship Kusagaki|Kusagaki]]'' (#334)
| #328, #333 and #339 were converted to the ''Hiburi'' class<br/>#332 and #335 - 338 were converted to the ''Ukuru'' class
| 
|-
| ''[[Hiburi class escort ship|Hiburi]]''
| 
| ''[[Japanese escort ship Hiburi|Hiburi]]'' (#328), ''[[Japanese escort ship Daitō|Daitō]]'' (#333), ''[[Japanese escort ship Shōnan|Shōnan]]'' (#339)
| 
| 
|-
| ''[[Ukuru class escort ship|Ukuru]]''
| 
| ''[[Japanese escort ship Ukuru|Ukuru]]'' (#332), ''[[Japanese escort ship Okinawa|Okinawa]]'' (#335), ''[[Japanese escort ship Amami|Amami]]'' (#336), ''[[Japanese escort ship Aguni|Aguni]]'' (#337), ''[[Japanese escort ship Shinnan|Shinnan]]'' (#338) 
| 
| 
|-
| Destroyer Type-A
| ''[[Yūgumo class destroyer|Yūgumo]]''
| #340 - 355
| ''[[Japanese destroyer Hayanami|Hayanami]]'' (#340), ''[[Japanese destroyer Hamanami|Hamanami]]'' (#341),  ''[[Japanese destroyer Okinami|Okinami]]'' (#342), ''[[Japanese destroyer Kishinami|Kishinami]]'' (#343), ''[[Japanese destroyer Asashimo|Asashimo]]'' (#344), ''[[Japanese destroyer Hayashimo|Hayashimo]]'' (#345), ''[[Japanese destroyer Akishimo|Akishimo]]'' (#346), ''[[Japanese destroyer Kiyoshimo|Kiyoshimo]]'' (#347)
| 
| #348 - 355
|-
| Destroyer Type-B
| ''[[Akizuki class destroyer (1942)|Akizuki]]''
| #360 - 369
| ''[[Japanese destroyer Shimotsuki|Shimotsuki]]'' (#360), ''[[Japanese destroyer Fuyutsuki|Fuyutsuki]]'' (#361),  ''[[Japanese destroyer Harutsuki|Harutsuki]]'' (#362), ''[[Japanese destroyer Yoizuki|Yoizuki]]'' (#363), ''[[Japanese destroyer Natsuzuki|Natsuzuki]]'' (#364), ''[[Japanese destroyer Hanazuki|Hanazuki]]'' (#366)
| 
| #367 - 369
|-
| Cruiser submarine Type-B
| ''[[Japanese Type-B submarine#Type-B Mod.1 (I-40 class)|I-40]]''
| #370 - 375
| ''[[Japanese submarine I-40|I-40]]'' (#370) to ''[[Japanese submarine I-45|I-45]]'' (#375) 
| 
| 
|-
| rowspan="2"|Cruiser submarine Type-C
| ''[[Japanese Type-C submarine#Type-C (I-16 class)|I-16]]''
| #376 - 378
| ''[[Japanese submarine I-46|I-46]]'' (#376) to ''[[Japanese submarine I-48|I-48]]'' (#378)
| 
| 
|-
| ''[[Japanese Type-C submarine#V22B Type|S49B]]''
| #379 - 381
| 
| 
| #379 - 381
|-
| rowspan="2"|Medium-sized submarine
| ''[[Kaichū type submarine#Kaichū VII (Sen-Chū, Ro-35 class)|Ro-35]]''
| #385 - 396
| ''[[Japanese submarine Ro-44|Ro-44]]'' (#385) to ''[[Japanese submarine Ro-50|Ro-50]]'' (#391), {{ship|Japanese submarine|Ro-55|1944|2}} (#396) 
| 
| #392 - 395
|-
| ''[[Ro-100 class submarine|Ro-100]]''
| #400 - 408
| ''[[Japanese submarine Ro-109|Ro-109]]'' (#400) to ''[[Japanese submarine Ro-117|Ro-117]]'' (#408),
| 
| 
|-
| Minesweeper
| ''[[No.19 class minesweeper|No.19]]''
| #410 - 437
| ''[[Japanese minesweeper No.25 (1943)|No.25]]'' (#410) to ''[[Japanese minesweeper No.30 (1944)|No.30]]'' (#415), ''[[Japanese minesweeper No.33 (1943)|No.33]]'' (#418), ''[[Japanese minesweeper No.34 (1944)|No.34]]'' (#419), ''[[Japanese minesweeper No.38 (1944)|No.38]]'' (#423), ''[[Japanese minesweeper No.39 (1944)|No.39]]'' (#424), ''[[Japanese minesweeper No.41 (1944)|No.41]]'' (#426)
| 
| #416 - 417, #420 - 422, #425, #427 - 437
|-
| Subchaser
| ''[[No.13 class submarine chaser|No.13]]''
| #440 - 459
| ''[[Japanese submarine chaser No.40|No.40]]'' (#440) to ''[[Japanese submarine chaser No.58|No.58]]'' (#458)
| 
| #459
|-
| Minelayer
| ''[[Sokuten class minelayer (1938)|Ajiro]]''
| #460 - 473
| ''[[Japanese minelayer Ajiro|Ajiro]]'' (#460)
| 
| #461 - 473
|-
| Auxiliary minesweeper
| ''[[No.1 class auxiliary minesweeper|Aux. No.1]]''
| #480 - 495
| ''[[Japanese auxiliary minesweeper No.7|Aux. No.7]]'' (#480) to ''[[Japanese auxiliary minesweeper No.22|Aux. No.22]]'' (#495)
| 
| 
|-
| Auxiliary subchaser
| ''[[No.1 class auxiliary submarine chaser|Aux. No.1]]''
| #500 - 599
| ''[[Japanese auxiliary subchaser No.1|Aux. No.1]]'' (#500) to ''[[Japanese auxiliary subchaser No.100|Aux. No.100]]'' (#599)
| 
| 
|-
| rowspan="2"|Patrol torpedo boat
| ''[[Japanese patrol torpedo boat No.10|No.10]]''
| #600
| ''No.10'' (#600)
| 
| 
|-
| ''[[Dai 11 Gō class patrol torpedo boat|No.11]]''
| #601 - 617
| ''[[Japanese patrol torpedo boat No.11|No.11]]'' (#601) to ''[[Japanese patrol torpedo boat No.16|No.16]]'' (#606) 
| 
| #607 - 617
|-
|}

==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)
*[[4th Naval Armaments Supplement Programme]] (Maru 4 Keikaku, 1939)
*[[Temporal Naval Armaments Supplement Programme]] (Maru Rin Keikaku, 1940)
*[[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)

==References==
*''Rekishi Gunzō series'', [[Gakken]] (Japan)
*''The Maru Special series'', [[Ushio Shobō]]
*Daiji Katagiri, ''Ship Name Chronicles of the Imperial Japanese Navy [[Combined Fleet]]'', Kōjinsha (Japan), June 1988, {{ISBN|4-7698-0386-9}}
*[[:ja:大日本帝国海軍艦艇一覧|大日本帝国海軍艦艇一覧]] (ja)
{{IJN Naval Armnament Supplement Programs}}
[[Category:Imperial Japanese Navy|Naval Armaments Supplement Programme]]
[[Category:Military history of Japan during World War II|Naval Armaments Supplement Programme]]