Yorimasa was a member of the Settsu-Genji family in the line of MINAMOTO no Yorimitsu with his feuds in provinces around Kinai (the area near Kyoto); he was a Kyo-samurai who had a position in the central government and did political activities in the Imperial Court and around the Sekkan regent families.
頼政は源頼光の系統の摂津源氏で、畿内近国に地盤を持ち中央に進出し、朝廷や摂関家近くで活動する京武士だった。