The idea of this paper is to attain larger share of the world market by minimizing the transportation cost through establishing factories in Vietnam by Korean firms. Of course, the authors are going to establish warehouse in Vietnam because there is no need to have it far from factories located in Vietnam to escape the high transportation cost burden. But the factories might be placed in Korea because the need of factories located in home country of main firm is necessary condition of running business in general. But there is no need at all in having warehouse in the home country of business firm, since warehouse does not give big employment opportunity, and high technology is not needed in managing it. Therefore the authors have factories in Korea and Vietnam, warehouses in Vietnam, and markets worldwide. So the case of Korea as a supply chain means strategic or managerial notion, not the physical or geographical one only. The main target of this paper is to analyze the economic efficiency of Korea as a supply chain hub in real terms when it places production bases in Vietnam, its relevant economic partner, for minimizing the business cost and enlarging world market share.