The Ministry of Greater East Asia (大東亜省 Daitōashō?) was a cabinet-level ministry in the government of the Empire of Japan from 1942–1945, established to administer overseas territories obtained by Japan in the Pacific War and to coordinate the establishment and development of the Greater East Asia Co-Prosperity Sphere.
The Ministry of Greater East Asia was established on 1 November 1942 under the administration of Prime Minister Hideki Tōjō, by absorbing the earlier Ministry of Colonial Affairs (拓務省 Takumushō?) and merging it with the East Asia Department and South Pacific Department of the Foreign Ministry and the East Asia Development Board (興亜院 Kōain?), which looked after affairs in Japanese-occupied China.