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The was signed between the United Statesmarker and Japanmarker in Washington DCmarker on January 19, 1960. It strengthened Japan's ties to the West during the Cold War era. The treaty also included general provisions on the further development of international cooperation and on improved future economic cooperation.


Major US military bases in Japan
The earlier Security Treaty of 1951 provided the initial basis for the Japan's security relations with the United States. It was signed after Japan gained full sovereignty at the end of the allied occupation.

Bilateral talks on revising the 1951 security pact began in 1959, and the new Treaty of Mutual Cooperation and Security was signed in Washington on January 19, 1960. When the pact was submitted to the Diet for ratification on February 5, it became the subject of bitter debate over the Japan-United States relationship and the occasion for violence in an all-out effort by the leftist opposition to prevent its passage. It was finally approved by the House of Representatives on May 20. Japan Socialist Party deputies boycotted the lower house session and tried to prevent the LDP deputies from entering the chamber; they were forcibly removed by the police. Massive demonstrations and rioting by students and trade unions followed. These outbursts prevented a scheduled visit to Japan by President Dwight D. Eisenhower and precipitated the resignation of Prime Minister Nobusuke Kishi, but not before the treaty was passed by default on June 19, when the House of Councillors failed to vote on the issue within the required thirty days after lower house approval.

Under the treaty, both parties assumed an obligation to maintain and develop their capacities to resist armed attack in common and to assist each other in case of armed attack on territories under Japanese administration. It was understood, however, that Japan could not come to the defense of the United States because it was constitutionally forbidden to send armed forces overseas (Article 9). In particular, the constitution forbids the maintenance of "land, sea, and air forces." It also expresses the Japanese people's renunciation of "the threat or use of force as a means of settling international disputes". The scope of the new treaty did not extend to the Ryukyu Islandsmarker, but an appended minute made clear that in case of an armed attack on the islands, both governments would consult and take appropriate action. Unlike the 1951 security pact, the new treaty provided for a ten-year term, after which it could be revoked upon one year's notice by either party.

Article 6 of the treaty contains a status of forces agreement on the stationing of United States forces in Japan, with specifics on the provision of facilities and areas for their use and on the administration of Japanese citizens employed in the facilities.The Agreed Minutes to the treaty specified that the Japanese government must be consulted prior to major changes in United States force deployment in Japan or to the use of Japanese bases for combat operations other than in defense of Japan itself. Also covered are the limits of the two countries' jurisdictions over crimes committed in Japan by United States military personnel.

The Mutual Security Assistance Pact of 1954 initially involved a military aid program that provided for Japan's acquisition of funds, matériel, and services for the nation's essential defense. Although Japan no longer received any aid from the United States by the 1960s, the agreement continued to serve as the basis for purchase and licensing agreements ensuring interoperability of the two nations' weapons and for the release of classified data to Japan, including both international intelligence reports and classified technical information.

Opposition movement

In Japan, the treaty is known as anpo (安保, a contraction of 安全保障 anzenhoshō) and the student movements in the 1960s and 1970s who opposed it were known as anpo hantai, or Zenkyoto. Some scholars spell it ampo, basing the spelling on the Japanese pronunciation.

See also


  1. Tokyo in 1967 : Rolling Stone

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