Even after that, they fought back and forth at each other, but in 1420 Morimasa ASHINA conquered Shingu-jo Castle (Mutsu Province) and Moritoshi SHINGU, the lord of the castle, was killed in battle and the remainders (of the defeated party) escaped to Echigo.
その後も一進一退の攻防が続いたが、応永27年(1420年)に蘆名盛政は新宮城_(陸奥国)を落とし、当主・新宮盛俊は戦死し、残党は越後に落ち延びた。