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Ampo

Japan / United States Security Treaty
Treaty of Mutual Cooperation and Security between the United States and Japan
(日本国とアメリカ合衆国との間の相互協力及び安全保障条約?)
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Treaty signature page
Type Military Alliance
Signed 19 January 1960
Location Washington, D.C.
Effective 19 May 1960
Parties  Japan
 United States
Citations 11 U.S.T. 1632; T.I.A.S. No. 4509
Language English, Japanese
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The Treaty of Mutual Cooperation and Security between the United States and Japan (日本国とアメリカ合衆国との間の相互協力及び安全保障条約 Nihon-koku to Amerika-gasshūkoku to no Aida no Sōgo Kyōryoku oyobi Anzen Hoshō Jōyaku?), also known in Japan as Anpo jōyaku (安保条約?) or just Anpo (安保?) for short, was first signed in 1952 at the San Francisco Presidio following the signing of the Treaty of San Francisco (commonly known as the Peace Treaty of San Francisco) at the San Francisco War Memorial Opera House. Then, the Security Treaty was later amended further on January 1960 between the US and Japan in Washington.

When the Treaty was first signed, it contained provisions that permitted the United States to act for the sake of maintaining peace in East Asia and even exert its power on Japanese domestic quarrels. The latter part mentioned has been deleted in the revised version of the treaty. In the amended treaty, articles that delineate mutual defense obligations, the US obligations to pre-inform Japan in times of the US army mobilization were included to alleviate unequal status suggested in the treaty signed in 1952. The treaty established that any attack against Japan or the United States perpetrated within Japanese territorial administration would be dangerous to the respective countries' own peace and safety. It requires both countries to act to meet the common danger. To support that requirement, it provided for the continued presence of US military bases in Japan.


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