After World War Ⅱ, West Germany started internal trade with East Germany, and through intra-German trade, the two Germanys could accomplish unification based on continuous human exchange and economic integration. Recently, China has also completed free trade level agreements (ECFA and CEPA) with Taiwan and city states, Hong Kong and Macau. China and Taiwan have made a stronger economic foundation and unification circumstance through the agreement. The trade of divided nations such as Korea, Germany and China usually started from private level transactions in the beginning, and it developed to internal level, later to international level trade. In 1992, South and North Korea agreed on internal trade through the Inter-Korean Basic Agreement. Recently, South Korea also received recognition for Gaeseong products as outward processing goods through free trade negotiations. Thus, it may be said that the two Koreas have already laid a firm foundation for a South and North Korea FTA. However, in order to achieve FTA level trade between the two Koreas, the internal trade of both Koreas