Masamori and his son Tadamori increased their power in Shikoku region through the capture of pirates and other accomplishments, and eventually TAIRA no Kiyomori's zensei (at the height of its prosperity) came into being.
正盛、忠盛父子は海賊の追捕などを経て西国に勢力を扶養し、やがて、平清盛の時代に全盛を迎える。