Postwar Japan is the period in Japanese history beginning with the surrender of Japan to the Allies of World War II on 2 September 1945, and lasting at least until the end of the Shōwa era in 1989.
Despite the massive devastation it suffered in the Second World War, Japan established itself as a global economic power at peace with the world after the Allied-occupation ended on 28 April 1952 by the Treaty of San Francisco. In terms of political power it was more reluctant, especially in the nonuse of military force. The post-war constitution of 1947 included Article 9, which restricted Japan from having a military force and engaging in war. However, it has operated military forces in the stationing of the United States Forces Japan based on the U.S.-Japan Security Treaty after the Allied occupation and the form of the Japanese Self-Defense Forces since 1954.