Moreover, the main branch of the Northern House became maternal grandfather over three generations--Fuyutsugu (Emperor Montoku), FUJIWARA no Yoshifusa (Emperor Seiwa) and FUJIWARA no Mototsune (Emperor Suzaku and Emperor Murakami)--whereby the predominance of the Northern House was established.
さらに、冬嗣（文徳天皇）・藤原良房（清和天皇）・藤原基経（朱雀天皇・村上天皇）と北家嫡流が三代に亘って天皇の外祖父となり、同家の優勢を確立した。