However, this decision bought anger and discontent from the nobles of Oshu (Mutsu province), and in 1402 the rebellion of Masamune DATE (Daizen no daibu (Master of the Palace Table)) (not related to Masamune of the Warring era) happened, who was allied with Muromachi bakufu, but he ordered Zenshu UESUGI to subdue this rebellion.
しかし、この措置は奥州の豪族達の反感を買い、1402年に室町幕府と結んでいた伊達政宗(大膳大夫)（戦国時代に活躍した政宗とは別人の先祖）の反乱（伊達政宗の乱）に起きるが、これを上杉禅秀（のちの上杉禅秀）に鎮圧させる。