He made powerful families and local bushi of Aki and Iwami serve as vassals, and concentrated his energies on establishing his supremacy in the Western region, bringing under his control the maritime forces of northern Kyushu and the Seto Inland Sea.
安芸、石見の豪族や国人らを臣従させ、北九州や瀬戸内海の水軍を平定するなど西国の支配権確立に力を傾ける。