This paper analyzes the economic structure and growth performance of the regional economies, focusing on Niigata, Toyama, Ishikawa and Fukui prefectures. Although these Japanese neighboring prefectures are all located along the Japan sea coast, their macroeconomic structures are not necessarily similar. Therefore, their economic performance in terms of GDP growth rate has not been similar in the period of the world economic recession. According to the scenario simulation of the world economic recession, Niigata Prefecture is expected to experience the largest negative impancts and Toyama Prefecture is likely to experience the smallest impacts among these prefectures. The outcomes will depend on the structure of the macro economy, especially on extent of regional interactions through intra-national trade.