Cloistered Emperor Goshirakawa's third Prince, Prince Mochihito was frustrated with the enthronement of Emperor Antoku, he raised an army with MINAMOTO no Yorimasa to overthrow the TAIRA clan in May of the same year.
安徳天皇の即位に不満を持ったのが後白河法皇の第三皇子以仁王で源頼政と結んで、同年5月に平家打倒の挙兵をした。