was an Imperial Japanese Army officer. He became head of the Operations Section of the Army General Staff, 1941–5, ranked as colonel. He worked with Colonel Masanobu Tsuji, on Japanese planning for some of the major battles of World War II. He also acted as private secretary to Hideki Tōjō. His name was mentioned in CIA documents as a plotter in a 1952 plan to kill the Japanese prime minister of the time, Shigeru Yoshida. He wrote Dai Toa Senso Zenshi (The Complete History of the Great East Asia War, 1953), a large-scale military history of the Pacific War.