In 2015, the total container throughput of Busan Port increased by 4.1% to 19.45 million TEU, while the throughput of transshipment cargo increased by 7.6% to 10.8 million TEU, indicating that transshipment cargo is increasing in importance in terms of both growth rate and market share. In the Northeast Asia region, mainly China, Japan, and Russian Far East ports use Busan port as transshipment port. Therefore, in this study, we want to derive port of marketing for transshipment of transit port of Busan port by analysis of distribution route (O / D) and portfolio analysis of major port of Korea, Japan, and Russia using Busan port as a transshipment port. The result indicated, Tianjin, Qingdao, Dalian, and Shanghai were included as key marketing target ports for the transshipment of Busan port. Ports requiring continuous marketing are Ports in Shenzhen, Xiamen, Hakata, Nagoya, Yokohama, Ningbo, Vladivostok, Tokyo, and Osaka. As a result of the selected ports, it can be used as a marketing strategy for attracting transshipment cargoes to Busan port and as a basic data.