Abstract: Under the social crisis in the early Taisho Period, Tanaka Chigakus theory of Nichirenshugi Kokutai combined the myth of the founding of Japan with the Lotus Sutra by Nichirens Buddhist idea, which advocated emperor worship and Japan centralism. Focusing on Tenno and Japan, the theory of Nichirenshugi Kokutai formed a kind of logic supporting absolute authority of the Tenno and beautifying the war of foreign aggression. While satisfying the expanding nationalism of modern Japan, the theory of Nichirenshugi Kokutai was utilized by ultranationalism and fascism in the Showa period, which became the cornerstone of the thought of foreign aggression.Under the social crisis in the early Taisho Period, Tanaka Chigakus theory of Nichirenshugi Kokutai combined the myth of the founding of Japan with the Lotus Sutra by Nichirens Buddhist idea, which advocated emperor worship and Japan centralism. Focusing on Tenno and Japan, the theory of Nichirenshugi Kokutai formed a kind of logic supporting absolute authority of the Tenno and beautifying the war of foreign aggression. While satisfying the expanding nationalism of modern Japan, the theory of Nichirenshugi Kokutai was utilized by ultranationalism and fascism in the Showa period, which became the cornerstone of the thought of foreign aggression.

Key words: Tanaka Chigaku, Nichirenism, the theory of Kokutai