He created huge profits by being appointed Aki-kokushu (Governor of Aki Province) and obtaining naval dominance over the Seto Inland Sea, and he and his father together expanded their power to Sai-goku (Western Japan).
安芸国守に任じられて瀬戸内海の制海権を手にすることで莫大な利益をあげ、父と共に西国への勢力を拡大した。