This article analyzes that Japan’s role towards the security of Japan and stability of regional order as the friction of the United States and China increases in the Asia - Pacific region. While the United states confronted the Soviet Union and the cold war structure was being built China formed alliance with the soviet union and secured the minimum security. However, Sino-Soviet relations gradually deteriorates, China approaches the United states. After the cold war, China will strive to expand its territory and influence with the aid of the Western countries including the United States. Rising China movement in the Asia - Pacific region is now eliminating the influence of the United States as the only superpower. Japan is striving to stabilize the order in the Asia-Pacific While pursuing new security relations with China by strengthening the alliance with the United States and promoting multilateral framework.