삼포는 1510년 삼포 왜란으로 인하여 폐쇄되었다가 1512년 임신약조에 따라서 제포가 개항되었으며, 1521년에 부산포를 추가로 개항하였다.
Sampo was closed in 1510 due to the Japanese invasion of Sampo, but in 1512 Jepo was opened based on the Pregnancy Treaty, as well as in 1521, Busanpo was also opened.