The extant circulating text has 40 volumes in total, but Vol. 22 had already been lost by the sixteenth century, and it is believed that the present one was completed by taking material from the volumes before and after it.
現存流布本で全40巻だが、16世紀の時点で22巻は既に欠落しており、前後の巻より素材を抜き出して補完しているものと考えられている。