Abstract: Since the World War II, prompted by the strategic interest, US has chosen Japan as the core ally in the Far East. After the cold war, from the requirement for the interest of the state, it strengthens the alliance with Japan. In regard to China, both US and Japan adopt the twoside policy for the distinction between politics and economy. But in detail, there are some differences. While US, being premised on keeping the dispute of the principle for China, goes further to admit China into the “stakeholders”, Japan, within the framestructure of the alliance between it and US, strengthens the policy for China. Even new Prime Minister Abe puts forward the “mutually beneficial strategy” about the relation between China and Japan. In view of the state’s interest of the peaceful development in China, it is necessary to strengthen the strategic dialogue among China, US and Japan, giving a impetus to the effective influence on Japan about US’s policy for contacting China.

Key words: Japan's following US, policy for China, strategic thinking of US and Japan