Although Suemitsu was the father-in-law of Tokiyori HOJO, he banded with Yasumura MIURA and rebelled against the Hojo clan (the Battle of Hoji); Suemitsu lost in the war and the majority of the family disappeared, it is said that only the family of Tsunemitsu in Echigo, the fourth son of Suemitsu, managed to survive.
季光は北条時頼の義父であったにもかかわらず三浦泰村と結んで北条氏に反旗を翻した（宝治合戦）が、敗北して一族の大半が果ててしまい、越後にいた季光の四男経光の家系が残ったとされている。