HIS: This Day in History: 1960 – Japan and the United States sign the US–Japan Mutual Security Treaty.
HIS: This Day in History: 1960 – Japan and the United States sign the US–Japan Mutual Security Treaty. The Treaty of Mutual Cooperation and Security between the United States and Japan , more commonly known as the U.S.-Japan Security Treaty in English and as the Anpo jōyaku (安保条約) or just Anpo (安保) in Japanese, is a treaty that permits the presence of U.S. military bases on Japanese soil, and commits the two nations to defend each other if one or the other is attacked. Over time, it has had the effect of establishing a military alliance between the United States and Japan. The current treaty, which took effect on June 23, 1960, revised and replaced an earlier version of the treaty, which had been signed in 1951 in conjunction with the signing of the San Francisco Peace Treaty that terminated World War II in Asia as well as the U.S.-led Occupation of Japan (1945–1952). The revision of the treaty in 1960 was a highly contentious process in Japan, and widespread opposition to its pas...