The Taira family set up headquarters in Yashima, Sanuki Province, and in November 1183, Norimori, along with his sons Michimori and Noritsune, took part in the Battle of Mizushima, emerging victorious.
平家は讃岐国屋島に本営を置き、教盛・通盛・教経の父子は同年閏10月の水島の戦いに参戦し勝利する。