37 books other than two books drawn in the Showa era are designated as a national treasure together with a scroll of "Imperial letter of the Emperor Gonara nyobo hosho" ("nyobo hosho" is a letter sent by the Court ladies by imperial order).
昭和の補写本2冊を除く37帖が、付属の後奈良天皇宸翰女房奉書1幅と共に国宝に指定されている。