For a long time, Genshin's Bodaishin-gi-yomon 菩提心義要文 was thought to be no longer extant. However, in 1968, Sato Tetsuei 佐藤哲英 discovered a manuscript and introduced it to academic circles. This manuscript is thought to be from the end of the Heian era or the Kamakura era. However, because this manuscript lacked its beginning, the complete contents could not be known. In examining whether or not another copy of the Bodaishin-gi-yomon existed someplace else, I learned that there was a copy in Kosan-ji 高山寺. This research considers the missing section based on the manuscript owned by Kosan-ji.
