Hidetsugu TOYOTOMI was the only person other than members of the Northern House of the Fujiwara clan who was appointed to serve as chief adviser to the Emperor (Hideyoshi TOYOTOMI was appointed under the name of FUJIWARA no Hideyoshi), and there is no example of a person other than members of the five major Fujiwara families (called Gosekke) who was appointed as regent to the Emperor.
藤原北家以外で関白となったのは豊臣秀次ただ一人（秀吉は藤原秀吉として任官）であり、五摂家以外からの摂政は例がない。