In the West, the mainstreaming of the extreme right has become noticeable. Japan’s postwar conservatism, which was inherited before the war, has a character in common with the recent extreme right populism of the West. In Japan, favorable Western values have been accepted as the state and capital have achieved capitalist modernization. The denial of the values of modern Europe and the West, popular among Western extreme right-wingers, has become a kind of common sense for Japan’s dominant ideology based on traditionalism: specifically, the idea of a “normal” state characterized by ethnocentrism and the exclusion of others. In Japan, the Emperor System is responsible for Japanese extremism. This paper will explore these circumstances in depth and excavate a nationalistic view of Japan from the notion of a “native” Japanese identity.