The , also known in Japan as or just for short, was first signed in 1952 following the siging of the Treaty of San Francisco (commonly known as the Peace Treaty of San Francisco). Then, it was later amended further on January 1960 between the United States and Japan in Washington. When the Treaty was first signed, it contained amendments that permitted the United States to not only to act for the sake of maintaining peace in East Asia, but also permitted for the United States to 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 st