The originator, Fusasaki, was promoted to councilor first among four Fujiwara brothers during the era of Emperor Gensho, later became the first Naishin (government post) since his grandfather, FUJIWARA no Kamatari, and fought as an aide close to the Emperor Gensho for political power against Nagayao.
祖の房前は元正天皇朝で藤原四兄弟に先んじて参議に昇進すると、後に祖父藤原鎌足以来の内臣となり、元正天皇の側近として長屋王と政権を争った。