Wartime Naval Armaments Supplement Programme (Japan, 1944)
Encyclopedia
The was the final armaments expansion plan of the Imperial Japanese Navy
Imperial Japanese Navy
The Imperial Japanese Navy was the navy of the Empire of Japan from 1869 until 1947, when it was dissolved following Japan's constitutional renunciation of the use of force as a means of settling international disputes...

 (IJN).

Background

Early 1944, the IJN started building warships for war. The plan did not include any large warships which were suitable for offensive operations.

Table of vessels

Category Class Vessel number(s) Completed Converted Cancelled
Military transporter 2nd class No.101
No.101 class landing ship
The was a class of amphibious assault ships of the Imperial Japanese Navy and Imperial Japanese Army , serving during and after World War II. The No.101 class was equipped with diesel engines, while the similar was equipped with turbine engine. The IJN called them . The No.103 class has the...

#1501–1569 and 32 vessels No.101 and 68 vessels 22 vessels were transferred to the Army
Imperial Japanese Army
-Foundation:During the Meiji Restoration, the military forces loyal to the Emperor were samurai drawn primarily from the loyalist feudal domains of Satsuma and Chōshū...

.
32 vessels
Coast defence boat Type-A (wooden) No.101 #1701–1760
Minelayer Kamishima
Kamishima class minelayer
The was a class of minelayers of the Imperial Japanese Navy , serving during and after World War II. 9 vessels were planned under the Maru Sen Programme, however only 1 vessel was completed until the end of war.-Background:...

#1801–1809 Kamishima
Japanese minelayer Kamishima
was a small minelayer of the Imperial Japanese Navy, which was in service during the final stages of World War II. She was named after Kamishima Island, a small island in Mie Prefecture, offshore Toba, Mie...

(#1801), Awashima (#1802)
#1803–1809
Minoo
Japanese minelayer Minoo
was a minelayer of the Imperial Japanese Navy, which was in service during the final stages of World War II. She was the lead ship of what was intended to be a two-vessel class, but her sister ship, designated Vessel #1822 was not completed before the end of the war.-Building :During the very final...

#1821–1822 Minoo (#1821) #1822
Coast defence boat Type-B (steel) No.1 #1851–1870
Auxiliary subchaser Aux. No.1
No.1 class auxiliary submarine chaser
The was a class of submarine chasers of the Imperial Japanese Navy , serving during World War II. 200 vessels were built under the Maru Kyū Programme and the Maru Sen Programme .-Background:...

#2001–2100 Aux. No.151 (#2001) to Aux. No.250 (#2100)
Auxiliary patrol boat Aux. No.1
No.1 class auxiliary patrol boat
The was a class of patrol boat of the Imperial Japanese Navy , serving during World War II. 280 vessels were planned under the Maru Sen Programme , however, only 27 vessels were completed before the end of the war.-Background:...

#2121–2400 Aux. No.1 (#2121) and 26 vessels #2125–2144, 2148–2150, 2155–2156, 2159–2173, 2176–2183, 2187–2203, 2207–2209, 2214–2229, 2232–2241, 2244–2252, 2261–2271, 2277–2282, 2287–2292, 2302–2310 and 2314–2400
Escort ship Type-C No.1 2401–2532 and 168 vessels No.1 (#2401) and 55 vessels #2446–2447, 2450–2452, 2455–2502, 2505–2506, 2515–2532 and 168 vessels
Escort ship Type-D No.2 #2701–2843 and 57 vessels No.2 (#2701) and 66 vessels #2735, 2740, 2743–2750, 2754–2755, 2757, 2760–2761, 2764, 2768, 2770, 2773–2774, 2776, 2781–2792, 2794, 2803–2843 and 57 vessels
Military transporter 1st class No.1
No.1 class landing ship
The was a class of amphibious assault ships of the Imperial Japanese Navy , serving during and after World War II. The IJN also called them .-Background:...

#2901–2922 and 12 vessels No.1 (#2901) and 20 vessels 12 vessels
Submarine Type-D I-361
I-361 class submarine
The was a type of the 1st class submarine in the Imperial Japanese Navy serving during the Second World War. The was different from the I-361 class, however since the I-373 was a development form of the I-361 class, this article describes both of them....

#2961 I-372 (#2961)
I-373
I-361 class submarine
The was a type of the 1st class submarine in the Imperial Japanese Navy serving during the Second World War. The was different from the I-361 class, however since the I-373 was a development form of the I-361 class, this article describes both of them....

#2962–2967 I-373 (#2962) #2963–2967
S60 #2968–2971 #2968–2971
Submarine Type-E S54-2 #2981–3024 and 48 boats #2981–3024 and 48 boats
Patrol torpedo boat PT-151, PT-201, PT-220, PT-235, PT-241, PT-301, PT-327, PT-411, PT-468, PT-469, PT-474, PT-491, PT-538, H-2, H-10, H-27, H-74 and H-101 1540 vessels approx. 860 vessels unknown
High-speed submarine (large) I-201 #4501–4506 I-201
Japanese submarine I-201
The Japanese submarine I-201 was a World War II, diesel-powered submarine. It was captured at the end of the war by American forces. After examination of its design, it was sunk off Oahu in 1946. It was discovered in 2009 by the Hawaii Undersea Research Laboratory.The submarine was one of the...

(#4501), I-202
Japanese submarine I-202
I-202 was one of only three I-200 class submarines of the Imperial Japanese Navy to be completed during World War II. The I-200 class were of advanced design, and had been built for high underwater speed...

(#4502), I-203 (#4503)
S56B #4507–4523 #4509–4523
Transport submarine (small) Ha-101
Ha-101 class submarine
The was a transport submarine of the Imperial Japanese Navy , serving during late World War II. The IJN planned to build 12 boats, but only 10 vessels were completed by the end of the war. The IJN called these submarines . Several boats were converted to tankers or mother ships for the midget...

#4601–4612 Ha-101 (#4601), Ha-102 (#4602), Ha-103 (#4603), Ha-104 (#4604), Ha-105 (#4605), Ha-106 (#4606), Ha-107 (#4607), Ha-108 (#4608), Ha-109 (#4609), Ha-111 (#4611)
Escort ship Type-B Ukuru
Ukuru class escort ship
The were a class of ships in the service of the Imperial Japanese Navy during World War II.The Japanese called these ships Kaibōkan, "ocean defence ships" , a name used to denote a multi-purpose vessel....

#4701–4721 Inagi (#4701), Habushi (#4702), Ojika (#4703), Kanawa
Japanese escort ship Kanawa
Kanawa was an of the Imperial Japanese Navy during the Second World War. After the war Kanawa was used in the repatriation service. She was then taken over by the British and scrapped in 1947 at Singapore....

(#4704), Uku (#4705), Takane (#4707), Kuga (#4709), Shiga (#4711), (#4712)
#4706, 4708, 4710 and 4713–4721
Destroyer Type-D Matsu
Matsu class destroyer
The were a class of destroyer built for the Imperial Japanese Navy , who referred to them as .-Design basis:The Matsu class were built late in World War II, and they were intended to be more cost-effective in response to the changing character of naval warfare at that time...

#4801 - 4832 Nire (#4809), Nashi (#4810), Sii (#4811), Enoki (#4812), Odake (#4814), Hatsuume (#4815) #4801–4808, 4813 and 4816–4832
Fleet oiler Hario
Japanese fleet oiler Hario
The was a Japanese fleet oiler, serving during the World War II. 4 vessels were planned under the Maru Sen Programme, however only 1 vessel was completed until the end of war.-Construction:...

#4901–4904 Hario (#4901) #4902–4904
High-speed submarine (small) Ha-201
Ha-201 class submarine
The was a small size-high underwater speed submarine of the Imperial Japanese Navy , serving during 1945. The official designation of the submarine was .-Construction:...

#4911–4989 Ha-201 (#4911), Ha-202 (#4912), Ha-203 (#4913), Ha-204 (#4914), Ha-205 (#4915), Ha-207 (#4917), Ha-208 (#4918), Ha-209 (#4919), Ha-210 (#4920), Ha-216 (#4926)

See also

  • 1st Naval Armaments Supplement Programme
    1st Naval Armaments Supplement Programme (Japan, 1931)
    The , otherwise known as the "Circle One" plan was the first of four expansion plans of the Imperial Japanese Navy between 1930 and the start of World War II.-Background:...

     (Maru 1 Keikaku, 1931)
  • 2nd Naval Armaments Supplement Programme
    2nd Naval Armaments Supplement Programme (Japan, 1934)
    The otherwise known as the "Circle Two" Plan was the second of four expansion plans of the Imperial Japanese Navy between 1930 and the start of World War II.-Background:...

     (Maru 2 Keikaku, 1934)
  • 3rd Naval Armaments Supplement Programme
    3rd Naval Armaments Supplement Programme (Japan, 1937)
    The otherwise known as the "Circle Three" Plan was the third of four expansion plans of the Imperial Japanese Navy between 1930 and the start of World War II.-Background:...

     (Maru 3 Keikaku, 1937)
  • 4th Naval Armaments Supplement Programme
    4th Naval Armaments Supplement Programme (Japan, 1939)
    The was one of the armaments expansion plan of the Imperial Japanese Navy .-Background:In 1939, the IJN started new naval armaments expansion plan...

     (Maru 4 Keikaku, 1939)
  • Temporal Naval Armaments Supplement Programme
    Temporal Naval Armaments Supplement Programme (Japan, 1940)
    The is one of the armaments expansion plan of the Imperial Japanese Navy .-Background:In October 1940, the IJN schemed building of the submarines and auxiliary vessels because there was a shortage of them.-Table of vessels:-References:...

     (Maru Rin Keikaku, 1940)
  • Rapidly Naval Armaments Supplement Programme (Maru Kyū Keikaku, 1941)
  • Additional Naval Armaments Supplement Programme
    Additional Naval Armaments Supplement Programme (Japan, 1941)
    The was one of the naval expansion plans of the Imperial Japanese Navy .-Background:In November 1941, the IJN required many additional submarines for the Pacific War, as a pressing matter. To meet this need, the IJN negotiated with the Ministry of Finance and received approval for 32 submarines...

     (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
    Modified 5th Naval Armaments Supplement Programme (Japan, 1942)
    The was one of the wartime armaments expansion plans of the Imperial Japanese Navy .-Background:In September 1942, after being defeated in the Battle of Midway, the IJN drew up a new armaments expansion plan. This plan was combined by the 5th Naval Armaments Supplement Programme and the 6th Naval...

    (Kai-Maru 5 Keikaku, 1942)
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