As for the false claim which caused Kagetoki's expulsion, according to ''Gyokuyo" (Diary of Kanezane KUJO), it was to report to Shogun MINAMOTO no Yoriie that there was a plot to make his brother MINAMOTO no Sanetomo Shogun; considering that Yoriie was expelled and assassinated by the conspiracy of the Hojo clan three years after Kagetoki's expulsion, and Sanetomo became Shogun with Tokimasa HOJO gaining real power, the reality of Kagetoki's expulsion was distorted because of the inconvenience of the Hojo clan and Kagetoki was painted as a villain.
景時追放の原因とされた讒言は、『玉葉』によると将軍源頼家に、その弟源実朝を将軍に担ごうとする陰謀がある事を報告したものであり、景時追放の3年後には北条氏の陰謀によって頼家が追放・暗殺され、実朝が将軍となり北条時政が実権を握っている事から、北条氏に不都合な景時追放の真相は歪曲され、景時を悪人として断じているのである。