As everyone knows, the US, China and Japan Korea`s three major import & export partners, and the ratio of the exports of these three countries covers 41.8% of 466.38 billion dollars of exports to the world. In addition, the weight of the imports of these three countries from the world is high enough to cover 41.5% ratio of 425.21 billion dollars. For this reason, in time of bringing up the import & export issues of Korea, it may be safe to say that it is almost impossible to have a discussion itself from the start without a detailed analysis and review of the three countries, the US, China, and Japan. Under such a recognition, this study aims at drawing the response strategy to several problems by analyzing the transitions of competitiveness in imports & exports up to the present since 1995 with its focus on the top imported 20 items from the US, China, and Japan. As the result of the analysis, the movement of rapid changes in major imported items from China was detected, and actually even the nature of the imported items affected is quickly moving from the agricultural & fishery items, which were featured in initial imports from China, to steel & metal products, machinery, and electronic & electrical products. This trend might be partially caused by the domestic corporation`s on-site launching in China, but, above all, it suggests Chinese corporations` competitive strength is being intensified day by day. Thus, it`s high time for Korea to inquire into and promote the export strategy on China on the basis of a long-term standpoint. Next, as for the imported items from the US, mostly agricultural products are featured excluding the items related to aircraft; on the contrary, in case of the imported items from Japan, our industrial circles` vulnerability to Japan is clearly exposed in that the imported items from Japan feature the parts & materials. It seems to be urgent for Korea to set up a strategy of ``choice & concentration`, which gives weight on parts & materials industry, for fostering import & export with Japan.