The Treaty of San Francisco restored Japan’s sovereignty after the Allied occupation on April 28, 1952. The treaty formally ended the legal state of war between Japan and most Allied powers.
Japan and 48 Allied nations signed the peace treaty in San Francisco on September 8, 1951. It ended the occupation, returned full sovereignty to Japan, and established terms concerning territory, reparations, and responsibility for the war.
The treaty did not take effect when it was signed. Its provisions became effective on April 28, 1952, marking the end of the occupation administered by the Allied powers, principally through the United States.
The Soviet Union signed the treaty conference documents but did not sign the peace treaty itself. China was also not a party because governments in Beijing and Taipei disputed which authority represented China.