Muneie went down to Bizen Province, relying on the Akamatsu clan, and there he was taken as a husband of a daughter of Takaie KOJIMA, who was a grandchild of Takanori KOJIMA who had a linage of the Miyake clan, and began to use the surname of UKITA.
赤松氏を頼り備前国へと下向した宗家はそこで三宅氏の流れを汲む児島高徳の孫にあたる児島高家の娘と入婿という形で婚姻関係を結び、宇喜多を称したという。