U.S. President Eisenhower was negotiating revisions to base agreements and alliance treaties with West Germany, the Philippines, and South Korea so that allied countries would politically accept the continuation of bases, in accordance with the New Look policy of using nuclear deterrence to reduce conventional forces and financially support the protracted Cold War. The revision of the Japan-U.S. Security Treaty was part of this process. In addition, public sentiment toward U.S. military bases had worsened due to the Fukuryu Maru incident in 1954, the Sunagawa Struggle in 1956, and the Girard incident in 1957. It was against this background that Kishi, who visited the U.S. in June 1957 for a Japan-U.S. summit meeting, proposed the revision of the Security Treaty. The U.S. side was seeking a stable, long-term, pro-U.S. conservative government in Japan, and after Kishi's Liberal Democratic Party succeeded in securing a little less than two-thirds of the seats in the House of Representatives in the May 1958 election, negotiations began in October. As a result, (1) Japan's share of the defense burden was abolished, (2) the internal disturbance clause was deleted, (3) a new 10-year deadline was established, (4) a system of prior consultation in the event of the introduction of nuclear weapons, and (5) the Status of Forces Agreement, which completely revised the Japan-U.S. Administrative Agreement, was established. However, with regard to (4), in 2009 it was revealed that there was a secret agreement in a broad sense, based on the tacit approval of inconsistent definitions. In anticipation of domestic turmoil, Kishi submitted a bill to amend the Law on the Execution of Duties by Police Officers in 1958, but the bill failed to be debated due to the impression that the former wartime leader would revive wartime controls, which led to mass opposition and increased unity, thus lowering the prestige of the LDP. In addition, when the treaty was ratified after it was signed in January 1960, a forced vote was held in May in preparation for the first visit of a U.S. president to Japan to commemorate the revision, leading to fierce opposition from both the ruling and opposition parties and the nationwide Security Treaty struggle. The visit to Japan was cancelled in order to avoid confusion, and the Kishi Cabinet was forced to resign in June when the new treaty was granted automatic approval. This revision brought the alliance closer to a relationship of equals and increased the legitimacy of the Security Treaty to the extent that it is still maintained today, 30 years after the end of the Cold War, but the return of Okinawa was postponed.