Wartime Naval Armaments Supplement Programme (Japan, 1944)

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
Minelayer	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)
High-speed submarine (large)	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), Iō (#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)

Background

Table of vessels

See also