However, since FUJIWARA no Yoshifusa became the first outside of the imperial family to be regent in 866, a regent was appointed for an infant emperor, and a Kanpaku (chief adviser to the Emperor) once he was an adult, after which many members of the emperor's extended family in the Fujiwara clan (the Northern House of the Fujiwara clan) became regent and Kanpaku.
しかし、866年に藤原良房が皇族以外として初めて摂政をとって以来、幼少の天皇には摂政が、成人後の天皇には関白が置かれ、以降は天皇の外戚となった藤原氏（藤原北家）の者が摂政・関白に就く例が生まれるようになった。