In the Hojo-ki (a record of the Hojo family), Ujimasa is referred to that 'the fourth family head, Ujimasa, is such a fool that he was deceived by Norihide MATSUDA, a roshin (main retainer) and disturbed the affairs of the state, but due to the virtue of his father, Ujiyasu, he was spared his life.'
北条記においては「四世の氏政は愚か者で、老臣の松田憲秀の悪いたくらみにまどわされ、国政を乱したけれども、まだ父氏康君の武徳のおかげがあって、どうやら無事であった」と評されている。