After tax collection capability by the Imperial Court diminished and the expenses for entertaining the envoy and kaishi became burden, Japan side added the limitations to have the envoy's visit once in 12 years, but the exchange had continued until the fall of Bo Hai.
日本側は、朝廷の徴税能力が衰え、使節供応と回賜のための経費が重荷となった後は、使節来朝を12年に1度にするなどの制限を加えたが、その交流は渤海滅亡まで継続した。