This faith is the syncretism of Shinto and Buddhism and according to it, Ieyasu TOKUGAWA is assumed as the temporary figure of Yakushi Nyorai who appeared in Japan while religious service is conducted in the way of Jinja Shinto.
この信仰では、徳川家康は薬師如来の仮の姿が日本に現れたものとし、神仏習合の形をとり神社神道形式で祭祀を行う。