The Modified 5th Naval Armaments Supplement Programme (改マル5計画, 戦備促進第二次実行計画, Kai-Maru 5 Keikaku, Senbi-Sokushin Dai-Ni-Ji Jikkō Keikaku) was one of the wartime armaments expansion plans of the Imperial Japanese Navy (IJN).
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 Armaments Supplement Programme to build the aircraft carriers rapidly. The main article was to build 20 aircraft carriers, and removed all battleships and heavy cruisers. They had approved 412 vessels, 1,150,000 tons. However, most of plans were not achieved. Until the end of the war only 60 vessels from this plan were completed.
Table of vessels
| Category | Class | Vessel number(s) | Completed | Converted | Cancelled |
| Aircraft carrier | Unryū | #5001–5015 | Amagi (#5001), Katsuragi (#5003) | #5002 and #5005 were converted to the Shinano | #5008–5015 |
| G15 (Modified Taiho) | #5021–5025 | #5021–5025 | |||
| Seaplane tender | Akitsushima | #5031–5033 | #5031–5033 | ||
| Submarine tender | J27 | #5034–5036 | #5034–5036 | ||
| Light cruiser | C44 | #5037–5038 | #5037–5038 | ||
| Minelayer | H12C | #5039 | #5039 | ||
| Destroyer Type-A | Yūgumo | #5041–5048 | #5041–5048 | ||
| Destroyer Type-B | Akizuki | #5061–5083 | #5061–5083 | ||
| Cruiser submarine Type-A | I-13 | #5091–5093 | I-14 (#5091) | ||
| S48 | #5094–5096 | #5094–5096 | |||
| Cruiser submarine Type-B | I-54 | #5101–5114 | #5101–5114 | ||
| S49A | #5115–5132 | #5115–5132 | |||
| Cruiser submarine Type-C | I-52 | #5141–5155 | #5141–5155 | ||
| S49B | #5156–5180 | #5156–5180 | |||
| Medium-sized submarine | Ro-35 | #5181–5223 | #5181–5223 | ||
| Submarine Special type | I-400 | #5231–5248 | I-400 (#5231), I-401 (#5232), I-402 (#5233) | #5234–5248 | |
| Escort ship Type-B | Ukuru | #5251–5284 | Yaku (#5251), Chikubu (#5253), Kōzu (#5255), Hodaka (#5256), Ikara (#5258), Ikuno (#5260) | #5252, 5254, 5257, 5259 and 5263–5266 were converted to the Hiburi class | #5261–#5262, 5267–5284 |
| Hiburi | Kume (#5252), Ikuna (#5254), Shisaka (#5257), Sakito (#5259), Mokuto (#5263), Habuto (#5264) | #5265–5266 | |||
| Minesweeper | No.19 | #5301–5336 | #5301–5336 | ||
| Subchaser | No.13 | #5341–5370 | No.60 (#5341), No.61 (#5342), No.63 (#5344) | #5343, 5345–5370 | |
| Fleet oiler | Kazahaya | #5381–5387 | #5381–5387 | ||
| J34 | #5388–5395 | #5388–5395 | |||
| Food supply ship | Kinesaki | #5401–5407 | #5401–5407 | ||
| J20C | #5408 | #5408 | |||
| J35 | #5409–5410 | #5409–5410 | |||
| Target ship | Ōhama | #5411–5415 | Ōhama (#5411) | #5412–5415 | |
| Repair ship | Akashi | #5416–5417 | #5416–5417 | ||
| Survey ship | J11C | #5418 | #5418 | ||
| Icebreaker | J23 | #5419 | #5419 | ||
| Minelayer | Ajiro | #5421–5432 | #5421–5432 | ||
| Submarine Type-D | I-361 | #5461–5471 | I-361 (#5461), I-362 (#5462), I-363 (#5463), I-364 (#5464), I-365 (#5465), I-366 (#5466), I-367 (#5467), I-368 (#5468), I-369 (#5469), I-370 (#5470), I-371 (#5471) | ||
| Destroyer Type-D | Matsu | #5481–5522 | Matsu (#5481), Take (#5482), Ume (#5483), Momo (#5484), Kuwa (#5485), Kiri (#5486), Sugi (#5487), Maki (#5488), Momi (#5489), Kashi (#5490), Kaya (#5492), Nara (#5493), Sakura (#5496), Yanagi (#5497), Tsubaki (#5498), Kaki (#5499), Kaba (#5500), Hinoki (#5502), Kaede (#5505), Keyaki (#5508), Tachibana (#5511), Tsuta (#5514), Hagi (#5517), Sumire (#5520), Kusunoki (#5521), Hatsuzakura (#5522) | #5491, 5494–5495, 5501, 5503–5504, 5506–5507, 5509–5510, 5512–5513, 5515–5516, 5518–5519 | |
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)
- Wartime Naval Armaments Supplement Programme (Maru Sen Keikaku, 1944)
References
改マル5計画 (ja)
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