What, in the end, was the essence of Japanese diplomacy in the postwar era? This chapter attempts to provide, in a systematic matter, an overview of the different aspects of Japanese diplomacy during the past six decades. In particular, after first looking at the three courses that faced Japan in the postwar—the social democratic approach, economics-first approach, and traditional nation-state approach—it then examines sixty years of Japanese diplomacy in toto and the role domestic politics played.