Moreover, there are parts that were improved (by MINAMOTO no Tsuneyori, according to a theory) after the death of Takaakira during the reign of the Emperor Goichijo, and it is considered that there were more than three lines of books with different contents and organizations.
更に高明没後にも後一条天皇の時代に整理・加筆された（源経頼説がある）部分があり、内容・構成が違う3種類以上の系統の本があったとみられている。