To place Tsunashima Ryosen’s thought in the context of the philosophy of religion in Japan, the study clarifies the development of his philosophy of religion with the deepening of his religious experience. Until 1903, his philosophy of religion intendedto elucidate the reasons behind the objective reality and authority of religious symbols created by subjectivity. However, as he began to feel the existential God in 1903, he considered such thought unnecessary. Instead, he aimed to verbalize the human conditions of the Son of God by means of Christian and Pure Land Buddhist ideas. Furthermore, he began to practice Christian and Pure Land Buddhist prayer. In this manner, he developed his philosophy of religion as a post-religious philosophy that utilized the philosophy of religion and religious traditions. To the best of my knowledge, such thought is worthy of being placed at the origin of the philosophy of religion in Japan.
