Yoritomo decided to send Yoshitsune, who was removed from the army to search for and kill the Taira clan and was staying at Kyoto, to Shikoku and Yoshitsune departed on February 18 (January 10 under the old lunar calendar) to search for and kill the Taira clan based in Yashima in Sanuki Province.
追討軍から外されて都にいた義経の四国派遣を決め、10日、義経は讃岐国屋島に拠る平氏追討へ向かう。