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This study aims to provide a quantitative overview of the industrial interdependence between Korea, China and Japan, three major economies in Northeast Asia, where globalization is currently under way. Specifically, the study adopted an international input-output framework to quantitatively measure the international interdependence between the three economies. Empirical analysis was centered on the direction of ‘trade linkage effects’ and of the changes in trade dependency ratios, utilizing the Hypothetical Extraction Method (HEM). The empirical analysis suggested given the industrial linkage structure between the three countries, Korea’s industrial production will rely more on domestic final demand under a Korea-China-Japan Economic Integration. However, under such agreements Korea’s intermediate imports from Japan are likely to increase. In the case of the Korea-China-Japan Economic Integration, the feedback effect benefiting Korea as a result of its own production activity will be minimal, as much of the induced production is likely to take place in China.