The earliest manuscript is the one once belonging to To-ji Temple, Kanchiin, which was hand-copied in 1291 by Kenin of Choraku-ji Temple in Gion, Kyoto, at the age of 72.
1291（正応4）年に京都祇園の長楽寺の兼胤という僧が72歳の時に書写した東寺観智院旧蔵本が最古の写本である。