Eisaku Satō was a Japanese politician who served as prime minister of Japan from 1964 to 1972. He was the third longest-serving and second longest-uninterrupted–serving Japanese prime minister. Satō is best remembered for securing the return of Okinawa in 1972, and for winning the Nobel Peace Prize in 1974, which stirred controversy. He was a former elite bureaucrat like his elder brother Nobusuke Kishi and a member of the Yoshida school like Hayato Ikeda. Like his predecessor he also supported keynesian economic policies.