In December 1184, Moritsuna was in Kojima of Bizen Province to search and kill the Taira clan, and on December 7, 1184, he captured a castle which was held by more than 500 horse soldiers led by TAIRA no Yukimori.
元暦元年（1184年）12月、盛綱は平氏追討の為備前国児島に在り、7日には平行盛が率いる五百余騎が篭もる城を攻め落とす。