Abstract: Soka Gakkai, one of the new religion groups in Japan, inherited “Rissho Ankoku ron” the idea of political and religious unity from Nichiren Shoshu, and zealously carried out political activities in the relaxed democratic and ruleoflaw environment after World War II , establishing Komeito in 1964. The relationship between Soka Gakkai and Komeito has experienced four periods: Period of political and religious unity led by the religious group (1964 to 1969), Period of separation of church and state (1970 to the early 1990s ), Period of the religious group becoming a tool of the partys struggle ( the 1990s ), Period of conservatization of political party and the centralization of religious group ( 2000present ). From the 1970s, the policy of Komeito gradually deviated from the religious ideology of Soka Gakkai. The change of the relationship between Soka Gakkai and Komeito shows that from postwar democratization to politics and religious pluralism, religious forces still have profound influence on Japanese politics. At the same time, the essential attributes of political parties determine that religious parties must take the political power as the highest goal. In the complex political struggle, the political opinions of religious parties often conflict with religious ideas and form the reaction force to their maternal group.

Key words: Japan, new religion, Soka Gakkai, Komeito, Charisma