The plan to overthrow the bakufu by his grandson, FUJIWARA no Yoritsugu (the fifth generation shogun) and the Ashikaga clan was revealed at the end of 1251, and Michiie became a suspect involved with the plan.
建長3年（1251年）末、孫の藤原頼嗣（第5代将軍）と足利氏を中心とした幕府転覆計画が発覚し、それに道家が関係しているという嫌疑がかかる。