In 1568, however, Yoemon UGAKI, his important senior vassal, was killed by Naoie UKITA, and Hisataka IGA, the lord of Kogura-jo Castle, went over to the other side by Naoie's plot, and in August in the same year, Kanagawa-jo Castle was attacked by the Ukita's forces, and Mototeru was killed by the firearms troop of Hisataka IGA.
が、永禄11年（1568年）、宇喜多直家に主力の重臣である宇垣与右衛門を謀殺され、さらに直家の調略により虎倉城主の伊賀久隆に寝返られ、同年7月、宇喜多勢に金川城を攻撃され元輝は伊賀久隆の鉄砲隊により討死。