Yoshihiro returned to his parents' family, renamed himself Morishige ASHINA and became the lord of Edosaki-jo Castle (in the Edosaki Domain), but he was deprived of his territory because he acted in concert with his elder brother, Yoshinobu SATAKE (also known as Ukyo Daibu), without taking a clear stand during the Battle of Sekigahara.
実家の佐竹氏に戻った義広は名を「蘆名盛重」と改めて、常陸江戸崎城主となる（江戸崎藩）が、関ヶ原の戦いの際には、旗幟を鮮明にしなかった実兄・佐竹義宣(右京大夫)と行動を共にしたために改易した。