The Security Treaty Between the United States and Japan (日本国とアメリカ合衆国との間の安全保障条約 Nipponkoku to Amerikagasshūkoku to no aida no anzen hoshōjōyaku?), was signed on 8 September 1951 in San Francisco, California between representatives of the United States and Japan.
The agreement contained five articles, which dictated that Japan grant the United States the territorial means for it to establish a military presence in the Far East. Moreover, the accord stated that Japan be prohibited from providing foreign powers any bases or any military-related rights without the consent of the United States. The accord was ratified by the United States Senate on 20 March 1952 and then it was signed into U.S. law by the President of the United States on 15 April 1952. Ultimately, the treaty went into effect on 28 April 1952.
Japan has this day signed a Treaty of Peace with the Allied Powers. On the coming into force of that Treaty, Japan will not have the effective means to exercise its inherent right of self-defense because it has been disarmed.
There is danger to Japan in this situation because irresponsible militarism has not yet been driven from the world. Therefore, Japan desires a Security Treaty with the United States of America to come into force simultaneously with the Treaty of Peace between the United States of America and Japan.
The Treaty of Peace recognizes that Japan as a sovereign nation has the right to enter into collective security arrangements, and further, the Charter of the United Nations recognizes that all nations possess an inherent right of individual and collective self-defense.
In exercise of these rights, Japan desires, as a provisional arrangement for its defense, that the United States of America should maintain armed forces of its own in and about Japan so as to deter armed attack upon Japan.