The was the 1943-44 War Programme to fund further wartime armaments expansion plans of the Imperial Japanese Navy (IJN).
Background Due to shifting wartime circumstances, the IJN focused on the construction of auxiliary and escort ships. As a result, the Wartime Naval Armaments Supplement Programme lacked any major warships capable of offensive operations.
Table of vessels funded under 1944-45 Estimates Category Class Vessel number(s) Completed Converted Cancelled Military transporter 2nd class No.101 #1501–1569 and 32 vessels No.101 and 68 vessels 22 vessels were transferred to the Army. 32 vessels Coast defence boat Type-A (steel) (:jp:海防艇) No.1 #1701–1760 Minelayer Kamishima #1801–1809 Kamishima (#1801), Awashima (#1802) #1803–1809 Minoo #1821–1822 Minoo (#1821) #1822 Coast defence boat Type-B (wood) (:jp:海防艇) No.101 #1851–1870 Auxiliary subchaser Aux. No.1 #2001–2100 Aux. No.151 (#2001) to Aux. No.250 (#2100) Auxiliary patrol boat Aux. No.1 #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 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 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 #2901--2922 and 12 vessels No.1 (#2901) and 20 vessels 12 vesselsSubmarine Type-D I-361 #2961 I-372 (#2961) I-373 #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 unknownHigh-speed submarine (large) I-201 #4501--4506 I-201 (#4501), I-202 (#4502), I-203 (#4503) S56B #4507--4523 #4509--4523 Transport submarine (small) Ha-101 #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) #4610 and #4612 Escort ship Type-B Ukuru #4701–4721 Inagi (#4701),Habushi (#4702),Ojika (#4703),Kanawa (#4704),Uku (#4705),Takane (#4707),Kuga (#4709),Shiga (#4711),Iō (#4712) #4706, #4708, #4710 and #4713–#4721 Destroyer Type-D Matsu #4801 - 4832 Nire (#4809), Nashi (#4810), Sii (#4811), Enoki (#4812), Odake (#4814), Hatsuume (#4815) #4801–4808, 4813 and 4816–4832 Fleet oiler Hario #4901–4904 Hario (#4901) #4902–4904 High-speed submarine (small) Ha-201 #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) #4916,#4921 - #4925,#4927 - #4989(of which 11 were launched and 16 more laid down; 42 cancelled before laying down{
Table of vessels funded under 1945-46 Estimates This programme was projected only, and the vessels were never ordered. Category Class Quantity planned High-speed submarine (large) I-201 76 vessels Submarine Type-D I-373 140 vessels Transport submarine (small) Ha-101 88 vessels High-speed submarine (small) Ha-201 10 vessels Escort ship Type-C No.1 168 vessels Escort ship Type-D No.2 60 vessels
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, (SNAJ), Histories of shipbuilding in Shōwa period (1), (Japan), September 1977 大日本帝国海軍艦艇一覧 (ja)
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) Rapidly Naval Armaments Supplement Programme (Maru Kyū Keikaku, 1941) 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)