In Shigetada HATAKEYAMA's Rebellion of July 17, 1205, he allied with the Hojo clan and was very successful, however, between September and October in the same year, he fell under suspicion from the Hojo clan of taking part in a revolt as a coconspirator in the Shigetada incident.
元久2年（1205年）6月22日(旧暦)の畠山重忠の乱では北条氏側に与して功を挙げたが、同年8月、逆に北条氏から重忠事件の共謀者として謀反の嫌疑をかけられる。