Yasuie did not join his elder brother, Takatoki, at the fall of the bakufu, and after releasing Tokiyuki HOJO, his elder brother's son, withdrew to Mutsu Province.
幕府滅亡時には兄の高時と行動を共にせず、兄の遺児である北条時行を逃がした後、自身も陸奥国へと落ち延びている。