From the enactment of the San Francisco Peace Treaty in 1952 to the normalisation of the Sino-Japanese diplomatic relations in 1972,Japan navigated a diplomatic strategy constrained by the dynamics of the East-West Cold War and'the San Francisco system'.On the one hand,the Japanese government maintained an alliance with the U.S.On the other hand,in terms of the relation with China,it pursued a policy towards China which aimed at keeping the Taiwan region of China within the Western camp,while seeking access to the Chinese market and enhancing the security environment through socio-economic development.Its policy adhered to the guiding principle involving a deliberate separation of political and diplomatic relations with the Taiwan authorities from economic and cultural exchanges with mainland China.Initially,this separation of the politics and economy was an essential part of a diplomatic mechanism aligned with the U.S.strategy.However,as Japan's national power strengthened and the international situation evolved in the 1960s,such policy began to exert influence on restraining on the U.S.diplomacy towards China.This policy had multifaceted impacts on Japan's relations with China,contributing to the realisation of Japan's political goal of impeding closer ties between the Chinese mainland and Taiwan,while laying the social foundation for Japan to achieve the normalisation of the diplomatic relations with China ahead of the U.S.