Eisaku Sat ( , Sat Eisaku, 27 March 1901 3 June 1975) was a Japanese politician who served as Prime Minister from 1964 to 1972. He is the third-longest serving Prime Minister, and ranks second in longest uninterrupted service as Prime Minister.

Sat entered the National Diet in 1949 as a member of the Liberal Party. Gradually rising through the ranks of Japanese politics, he held a series of cabinet positions. In 1964 he succeeded Hayato Ikeda as Prime Minister, becoming the first Prime Minister to have been born in the 20th century.

As Prime Minister, Sat presided over a period of rapid economic growth. He arranged for the formal return of Okinawa (Ryukyu Islands; occupied by the United States since the end of the Second World War) to Japanese control. Sat brought Japan into the Nuclear Non-Proliferation Treaty, for which he received the Nobel Peace Prize as a co-recipient in 1974.



The prime minister of Japan (日本国内閣総理大臣, Nihon-koku naikaku sōridaijin, or shushō (首相)) (informally referred to as the PMOJ) is the head of the executive branch of the government of Japan. The prime minister directs the National Cabinet and is the commander-in-chief of the Japan Self-Defense Forces; he is appointed by the emperor of Japan after being designated by the National Diet and must enjoy the confidence of the House of Representatives to remain in office. He is the head of the Cabinet and appoints and dismisses the other ministers of state. The literal translation of the Japanese name for the office is Minister for the Comprehensive Administration of (or the Presidency over) the Cabinet.

The current prime minister of Japan is Fumio Kishida, who replaced Yoshihide Suga on 4 October 2021.