Wartime Naval Armaments Supplement Programme
The Wartime Naval Armaments Supplement Programme (マル戦計画, 昭和十八年度戦時艦艇建造計画 Maru Sen Keikaku, Shōwa-Jūhachi-Nendo Senji Kantei-Kenzō Keikaku) was the final armaments expansion plan of the Imperial Japanese Navy (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 | #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) | 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 (wooden) | 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 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 | #2901--2922 and 12 vessels | No.1 (#2901) and 20 vessels | 12 vessels | |
| Submarine 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 | unknown | |
| High-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) | ||
| 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) | ||
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
- "The Society of Naval Architects of Japan". (SNAJ), Histories of shipbuilding in Shōwa period (1), "Hara Shobō". (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)
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