It is worth noting that the book provides convenience for referring the precedents in the texts of the early Heian period in particular which are easy for searching, and unnecessary modifications to the text were all avoided true to the original text.
特筆すべきは検索が容易な平安前期の史書で特に先例を調べるのに便宜を図っており、原文主義をとって余計な文章の改変を一切排している。