Unlike the Kashiwade clan, the Azumi clan influenced on the western provinces such as; the Seto Inland Sea and Iki, and dominated male divers and amabe (people who served the Imperial court with their techniques of ocean navigation) in Awaji-shima Island and Shodo-shima Island.
膳氏とは逆に瀬戸内海、壱岐など西国に影響力をもち、淡路島や小豆島などの海人、海部を支配していたとも言われる。