Thanks to the extinction of both families of Horikawa and Tsuchimikado, the decline of Nakanoin family and the political maneuver by Arimitsu ROKUJO, who had a sense of crisis for the appointment of Chikafusa KITABATAKE and Arimitsu ROKUJO, the monopolization of Genji Choja by the Koga family of Murakami-Genji became firm in the Muromachi period.
室町時代に堀川・土御門両家は断絶し、中院家が衰退したことと北畠親房や六条有光の任命に危機感を抱いた久我長通の政治工作によって村上源氏における久我家の源氏長者独占が確立した。