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Born 1880, in Iwate Prefecture; died 1948. Japanese admiral and statesman. Graduate of the Naval Academy.
Yonai was commander of the Japanese Navy in 1936, minister of the navy from 1937 to 1939, and prime minister from January to July 1940. He became deputy prime minister and minister of the navy in July 1944 and was minister of the navy from April to August 1945.