Tokimasa was the maternal grandfather of still young Yoriie, and he was supposed to have had a strong resentment against Yoshitsune, because of some reasons such as his legitimate son Yoshitoki was robbed of his merit by Yoshitsune in battle.
未だ幼年である頼家の外祖父であり、嫡男義時が戦功を義経に奪われるなど、時政は義経に強い敵意を抱いていたと考えられる。