This paper discusses the development of Shin-Buddhism and philosophy of religion of Kyoto School under the influence of Shin-Buddhism in Modern Japan. In order to capture the context of the philosophy of religion of Shin-Buddhism, I shall examine the philosophy of religion of Kiyozawa Manshi (1863-1903), Nishida Kitarō (1870-1945) and Tanabe Hajime (1885-1962). First, I will mention the definition of religion by Kiyozawa and Nishida. Second, I will discuss notions of "infinite and finite" as well as "Hōzōbosatsu" by Kiyozawa and Tanabe who focused on other-power. I shall also discuss the notions of "spiritualism," "gyakutaiō," "gyōshi" by Kiyozawa, Nishida and Tanabe. By analyzing the three philosophers' ideas of self-exertion and other-power, I will discuss the connection of their philosophy of religion, and their modern significance.