As for the number of volumes, it is evident from "Chuyuki" (The Diary of FUJIWARA no Munetada), "Honchoshojaku mokuroku" (the oldest list of Japanese books in existence written in the Kamakura period) and others that there were 130 volumes in total, of which 26 still exist now.
巻数について、『中右記』『本朝書籍目録』等で、全130巻あったことが分かるが、現存するのはそのうちの26巻である。