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Yonai Mitsumasa (米内 光政; March 2 1880–April 20 1948) was a Japanese politician and the 37th Prime Minister of Japan from January 16 1940 to July 22 1940.
He was born in Iwate prefecture.
| Preceded by: Abe Nobuyuki | Prime Minister of Japan 1940 | Succeeded by: Konoe Fumimaro |