Takeshi Umehara developed his own theory of Japanese culture, starting with Western philosophy, and in his later years came to present a new concept called “human philosophy.” Umehara, who expressed a sense of crisis in the Heisei era when the Cold War era ended and economic growth and low birth rates accelerated, tried to promote moral education through religious education based on Buddhist ideas.He strongly criticized the government’s policy and insisted on restoration of morality through religious thought, as Japanese politics gradually shifted to the right in the 45th anniversary of the end of World War II, including Yasukuni shrine visits and revisions to the Basic Law on Education. Umehara’s research mainly criticized modern Western philosophy and claimed that the Buddhist idea of “immortal life” should be inherited by mankind through war experiences inspired by the influx of ideas from Western imperialism.He argued that Western “monotheistic” ideas and “human-centered” thoughts are ideas that mankind should overcome, and developed the logic of “human philosophy” based on the Buddhist idea that “everything has Buddha nature, so everyone should become Buddha.” As a religious study, Umehara’s logic did not value the existing literature and had biased features and contradictions. Nevertheless, his work influenced Japanese civil society. From his last move to protect Article 9 of the Constitution, which clearly states that he renounces war, he can see the intellectual figure as a “thinker of civil society” who tried to match his thoughts and actions.