Hatoyama Ichiro became the first Liberal Democratic Party (LDP) president and used the restoration of relations with the Soviet Union as his way to leave the stage while everyone was still clapping. Japan and the Soviet Union were still legally in a state of war, as the latter had not signed the Allied peace treaty with Japan, and only a few of the nearly 600,000 Japanese who had been taken prisoner in Siberia had been returned. The Kishi Cabinet also greatly contributed to Japan's high economic growth. The main issue Kishi Nobusuke chose to deal with was the revision of the Japan-US Security Treaty. Ikeda Hayato became LDP president and prime minister following Kishi. Ikeda resigned for health reasons in 1964, and Sato Cabinets, who had traditionally been critical of Ikeda's approach, became party president. The LDP provided the capitalist order for the economic world to function and for the bureaucracy the necessary political guarantees to implement their policies.