As all the interests of trade with the Song dynasty of China were held by Dazaifu, the former Chunagon (vice-councilor of state) and Dainagon (chief councilor of state) frequently became Dazai Gonnosochi for the interests.
更に、中国（宋(王朝)）との交易の利権も大宰府に集中したことからその利権を目当てに大宰権帥には中納言・大納言経験者がなることが多かった。