This study analyzes an essential condition of technology integration through the combination of technologies. Using the case of the DENSO Corporation and Japan Electronic Control Systems (JECS), both of which are engaged in the electronic fuel injection industry, this study identifies the differences in the technology integration processes of the two companies. It has been proposed that industry leaders become successful because they obtain an advantage by acquiring complementary assets in the event of technological change. However, it is difficult to limit ways for overcoming technological change. This study emphasizes that industry leaders become successful in technological change not because they hold complementary assets but because of technology integration. DENSO Corporation, a leader in the automotive component industry, successfully weathered technological changes; however, JECS failed to overcome technological changes and merged. By comparing DENSO's technological integration process with that of JECS, this study shows how the control of technological knowledge and know-how in each division is the most important aspect for technology integration.
