When Mochiuji began his military action in 1435, Norizane UESUGI who had assumed Kanto Kanrei in 1419 stopped Mochiuji, and his relationship with Mochiuji became tense.
1435年（永享7年）に持氏は軍事行動をはじめ、1419年（応永26）に関東管領に就任した上杉憲実は持氏を制止するが、持氏と険悪な関係となった。