The Ministry of Munitions (軍需省 Gunjushō ) was a cabinet-level ministry in the final days of the Empire of Japan, charged with the procurement and manufacture of armaments, spare parts and munitions to support the Japanese war effort in World War II
The Ministry of Munitions was created on 1 November 1943  out of the Board of Planning of the Ministry of Commerce and Industry, which was subsequently abolished. With an increasing portion of Japan's industrial base and infrastructure damaged by Allied air raids, the Japanese government felt it necessary to unify the administration of munitions production to improve efficiency and to increase production levels, particularly that of aircraft. The concept was inspired by the German Ministry of Armaments and Munitions under Fritz Todt and Albert Speer, which had successfully increased Nazi Germany's industrial production under similar adverse conditions, and was also an unsuccessful political move by the military to impose more control over the zaibatsu.
Key firms were designated as components of the nationalized Munitions Companies System, and managers were given positions as government officials. Production staff was regarded as conscript labor and was not allowed to quit, or go on strike. State-controlled financial institutions provided working capital and subsidized the firms for any losses.
|1||1 Nov 1943 – 22 Jul 1944||Hideki Tojo|
|2||22 Jul 1944 – 19 Dec 1944||Ginjirō Fujiwara|
|3||19 Dec 1944 – 7 Apr 1945||Shigeru Yoshida|
|4||7 Apr 1945 – 17 Aug 1945||Teijirō Toyoda|
|5||17 Aug 1945 – 26 Aug 1945||Chikuhei Nakajima|