Abstract
Japanese auto companies maintain their competitive advantages in the world. Additionally it is deduced that dominant design in the industry changes from conventional petrol vehicles to new generation vehicles such as Hybrid Vehicle (HV). Our purpose is comparisons of the three companies focusing on change of auto industry caused by HV unlike other conventional researches comparing Japanese auto companies at the corporate level. Specifically, this paper visualizes and compares their technology innovation strategies in the HV industry by using their patent documents as their ample source of technical and commercial knowledge.
