He was deeply involved in Japan-Song trade when he was Dazai no daini (the next seat position of Dazaifu), and he organized the pirates in the Seto Inland Sea as a naval force under the Ise Heishi (Taira clan) when he was governor of the Aki and Harima Provinces and strengthened his control over Seto Inland Sea transportation.
大宰大弐を務めた時は日宋貿易に深く関与し、安芸守・播磨守を務めた時は瀬戸内海の海賊を伊勢平氏勢力下の水軍に編成して瀬戸内海交通の支配を強めていった。