After that Mutsu was calm for a while but there still remained the area in Ezo which was not annexed to Mutsu Province, so MINAMOTO no Yoritoshi from Yamato-Genji (Minamoto clan), who was remotely related to Yoriyoshi, subdued as far as the northern edge of Aomori with the troops of the Kiyohara clan in Dewa Province and the authority of Mutsu kokufu came to range throughout Tohoku area.
その後は、しばらく陸奥は平穏であったが、依然として東北には陸奥国に編入しきれていない蝦夷の領域があり、頼義の遠縁にあたる大和源氏の源頼俊が出羽清原氏の援軍を得て、青森北端までを制圧し、陸奥国府の威光が東北一帯まで及ぶようになった。