(It was far from a coincidence that the death of the Retired Emperor Saga, who had patriarchal authority, was the start of FUJIWARA no Yoshifusa's taking over power, and that the regency stagnated for a while in the reign of Emperor Daigo, when the Cloistered Emperor Uda was supporting him as a patriarch, and also that the Retired Emperor Shirakawa, in a revival of the patriarchal retired emperor that had disappeared for a long time, started cloistered government in place of the regency.)
（藤原良房の権力掌握開始が家父長的権力を有した嵯峨上皇の崩御に始まり、宇多法皇が家父長として背後にあった醍醐天皇の時代に一時摂関政治が停滞し、久しく絶えていた家父長的な上皇の復活である白河上皇が摂関政治に代わる院政を開始した事は偶然では決して片付けられないものである）。