A book, Sasekishu, evaluated Yasutoki as follows: 'Yasutoki is a real wise man. He feels people's grief as his own, and he is a person who is like everybody's parent'; it described Yasutoki as one who, repeats 'reason, reason' in trials and is deeply moved even the point of tears, saying, 'There is nothing more interesting than reason,' when he listens to a reasonable episode.
沙石集は泰時を「まことの賢人である。民の嘆きを自分の嘆きとし、万人の父母のような人である」と評し、裁判の際には「道理、道理」と繰り返し、道理に適った話を聞けば「道理ほどに面白きものはない」と言って感動して涙まで流すと伝えている