From olden times, it has been considered that ONO no Tofu transcribed it, but in the light of the style of calligraphy and writing paper, it seems to have been made during the rule by the retired Emperors, two centuries later than Tofu's time
古来小野道風を伝承筆者とするが、書風・料紙等から見て道風より2世紀ほど後の院政期の作と思われる。