After the repression of the Oshu District, he went to Oshu with his father, and entered the Myou-jo Castle where a senior vassal of the Kasai clan lived and had governance, but an uprising broke out in the territory in response to his father's tyranny.
奥州仕置後、父とともに奥州入りし、葛西氏の重臣の居城であった名生城に入城し統治を行ったが、父の苛政のため領内では一揆が勃発。