Although Michiyasu EDO acted as a vassal to the Satake clan, he, independent-minded, expanded his sphere of influence to the western and southern areas of Hitachi where there were a series of disturbances such as succession disputes within the Furukawa kubo family.
江戸通泰は佐竹氏に臣従の姿勢を見せたものの、独自の勢力を保ち、古河公方家の家督争いなどで混乱が続く常陸西部及び南部に進出する。