My research will take the Tannishō as its object of study. The contents of the Tannishō comprise eighteen chapters. The first half (chapters one to ten) records Shinran's thoughts on the nenbutsu. The later half is the author Yuien's lamentation and criticism of that period's religious world and Shinran's disciples' misunderstandings of Shinran's thought. The famous phrase of the Tannishō, “If good people take rebirth in the Pureland, how much more so the wicked people?” became representative of Japan's Pureland thought of akuninshōki 惡人正機. It not only had great signifigance in Japanese Buddhist history, but also had far reaching and deep influences on Japanese culture. Thus we have such stories of Meiji period Buddhist rivivals of the Tannishō. In first-class western universities there are many specialist researchers of Shinran's thought and many people rely on the Tannishō to understand Shinran's thought and comprehend Japan itself, but in Taiwan there are few who research it. Based upon the aforementioned background my research will on one hand seek to explain Shiran's thought as an objective, but on the other it will also according to tradition investigate the modern signifigance of it. I will adopt a traditional research approach to Shinran's thought and expect to discern within the Tannishō the characteristics of Japanese Pureland thought and the reality of the cultural signifigance of the faith as well as exploring the origins and development of the thought within the text. I expect to be able to in accord with a reasonable position clarify its thought characteristics.