This study illustrates how Toyota, one of the world’s largest automobile companies, emerged as a leading research and development (R&D) company in the rechargeable battery business in Japan. This study examines the 1990s–2000s period, during which Toyota accumulated substantial R&D capability in rechargeable battery technology. Several automobile companies, such as Toyota and Nissan, have engaged in research on rechargeable battery systems that are adaptable to electronic vehicles. Compared to Nissan, Toyota collaborated with several external partners. A time-series analysis of patent data comprising 631 samples spanning from 1998 to 2003 shows that Toyota accumulated its R&D capability over time, absorbing technical expertise from partners and ultimately evolving into a leading company. |
