During the era of the Empire of Japan, the Shinto religion was politically and socially institutionalized as "State Shinto," treating it as "national morality" and utilizing it as an ideological pillar for militarism. While the principle of the separation of religion and state does not necessarily prohibit all interactions between politics and religion, Japan's historical background has led to a situation where the presence of religion in political or public domains is excessively avoided. This tendency is most evident in the context of the military organization, the Self-Defense Forces (SDF), and its relationship with religions. For example, the institution of military chaplains, which exists in other countries, is not recognized in Japan. Furthermore, memorial monuments erected for the purpose of honoring the dead at military bases have been completely removed. This excessive exclusion of religious elements from the SDF raises the question of whether it might conflict with the freedom of religion of its personnel.