As a court noble during the transition period between the era of rule by regents and advisors (Sekkan seiji) into the era of rule by Retired Emperors (the Insei period), he recorded the changes in that period, the events that happened in his immediate circle, and his interactions with famous people of the day, and also noted his own opinions and evaluations of these activities in the diary he left behind, making him a person of great historical significance who recorded his first-person grasp of the period in his diary, a historical record of tremendous value, and passed on that understanding to later generations.
摂関政治から院政への過渡期の公卿として、その時代の動きや自身の身辺での出来事、また、重要な人物との接触や、その活動についての自身の意見や評価を日記として残し、その時代をつかむ上で重要な史料を後世に提供した重要人物である。