Although it lacks an article on the Hogen War and Heiji War, the articles on the birth of Emperor Antoku in 1178, his enthronement in 1180, and the enthronement and Daijoe (banquet on the occasion of the first ceremonial offering of rice by the newly-enthroned emperor) of Emperor Gotoba in 1184 are precise, which shows that Tadachika was familiar with chogi (ceremony at the Imperial Court) and the political situation.
保元の乱・平治の乱の記事は欠けているが、治承2年（1178年）の安徳天皇誕生、同4年（1180年）の即位、元暦元年（1184年）の後鳥羽天皇の即位と大嘗会の記事は緻密で、忠親が朝儀や政界の情勢に通じていたことが分かる。