대본영
The Imperial General Headquarters was established by Imperial Decree 52 on 22 May 1893 under the auspices of creating a central command for both the Imperial Japanese Army General Staff Office and the Imperial Japanese Navy General Staff. The Emperor of Japan who was defined as both Head of State and the Generalissimo of the Imperial Japanese Armed Forces according to the Meiji Constitution of 1889 to 1945, was the head of the Imperial General Headquarters, and was assisted by staff appointed from the Imperial Japanese Army and Imperial Japanese Navy.