Coming to power after the deaths of Michitaka and Michikane, FUJIWARA no Michinaga appointed Arikuni Dazai no Daini in order to expand trade with the Song Dynasty of China and to implement the policy of rebuilding Saikaido (ancient name of Kyushu).
長徳元年（995年）、道隆・道兼の没後に政権を握った藤原道長は宋(王朝)との交易拡大と西海道の再建政策実施のために在国を大宰大弐に任じた。