Eisaku Sato

Eisaku Sato became Prime Minister of Japan on November 9, 1964, succeeding Hayato Ikeda. His appointment marked the start of a record-long continuous tenure of nearly eight years. Sato's government focused on economic growth, nuclear non-proliferation, and reversion of Okinawa.

Sato signed the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) on February 3, 1970, committing Japan to not develop nuclear weapons. The decision was controversial domestically but aligned with Japan's post-war pacifist constitution and strengthened its alliance with the United States.

Sato secured the reversion of Okinawa from U.S. control to Japan on May 15, 1972, after years of negotiations. The agreement included the removal of nuclear weapons from Okinawa and maintained the U.S.-Japan Security Treaty. This was a major diplomatic achievement for Sato.

Sato was awarded the Nobel Peace Prize on December 10, 1974, for his efforts to promote nuclear non-proliferation and regional stability. He was the first Japanese prime minister to receive the prize. The award recognized his role in signing the Nuclear Non-Proliferation Treaty and returning Okinawa.