Included in the collection are eight important cultural artifacts such as "Sango shiki chu shu" (written by Kukai, annotated "Sango shiki"); "Shunki" (the diary of FUJIWARA no Sukefusa, a noble of the Heian period); "Senchakuhongan nenbutsu shu" (a collection of Buddhist invocations written by Honen); and "Yuasa Kagemoto Kishinjo" (a letter signed by Myoe, a Japanese Buddhist monk).
収蔵品には、『三教指帰注集』(空海著『三教指帰』の古注釈)、『春記』(平安時代の貴族藤原資房の日記)、『選択本願念仏集』(法然著)、「湯浅景基寄進状」(明恵の自筆署名あり)などの国の重要文化財8点が含まれている。