During the Kamakura period, the shogunate was particularly on the alert for the Sasaki clan, partly because most of the Sasaki clan had a history of belonging to the court's side in the Jokyu-no-ran War.
鎌倉時代、佐々木氏は、承久の乱で一族の多くが宮方に属した前歴もあって、幕府から特に警戒されていた。