After the death of Dokan OTA Ujiyori became the chief vassal with tremendous influence; however, Sadamasa's political style, such as tying a peace accord with Kogakubo Shigeuji ASHIKAGA only to immediately revoke it, began to invite estrangement from his vassals.
太田道灌が誅殺された後に氏頼は第一の重臣として家中において重きをなしたが、古河公方足利成氏と和議を結びながらすぐにこれを破棄するなど定正の政治手法は家臣の離反を招くようになる。