Kyōgyōshinshō: On Teaching, Practice, Faith, and Enlightenment is generally known simply as the Kyōgyōshinshō and is Shinran’s masterpiece, the basic doctrinal text of Shin Buddhism (the Jōdo Shinshū sect of Japanese Pure Land Buddhism). The text is characterized by its many quotations taken from numerous Buddhist scriptures to clarify Shin concepts. At the same time the author refrains as much as possible from adding his personal views. This work is thus an attempt by Shinran to systematize his thought by means of quotations from Buddhist scriptures. It should be mentioned that Rennyo, the eighth patriarch of the Shin sect, selected a passage from this work to be read daily by Shin followers: the Shōshin-nembutsu-ge (“Verses on Correct Faith and Nembutsu”), taken from the closing section of the chapter “‘On Practice.”

Source
Jp. Kenjōdo shinjitsu kyōgyō shōmon rui (顯淨土眞實教行証文類), composed by Shinran. 6 fascicles.