The reason may lie in the fact that Naganao ASANO as the head of the Asano family, on one hand, had contributed to the court by undertaking to rebuild the Dairi (Imperial Palace) which had been burned down and that Yoshinaka KIRA, on the other hand, had allegedly involved in Shogun's various political maneuvers in the direction of the court, such that the Shogun had pressured Emperor Gosai into abdication of the throne, and therefore, it is likely that Kira was hated not only by Asano family and his retainers but also by the court.
浅野長直の代に焼失した内裏の再建を請け負った浅野家に対し、後西天皇に対する譲位圧力など幕府の様々な朝廷政治工作にかかわっていたであろう吉良義央は朝廷からも憎まれていたのかもしれない。