Taisei Corporation

Honda and Taisei announced on the 5th that they have developed the foundational technology for a magnetic-field-coupling wireless power supply road system that delivers power contactlessly to electric vehicles while they are driving. Three companies took part in the development: Honda R&D, Honda's research and development subsidiary, and Taisei together with its subsidiary Taisei Rotec, which handles road and paving work. The system supplies power from transmission equipment buried in the road to receiving devices on the vehicle side, and is designed to handle up to the typical maximum speed of expressways. With an eye toward large commercial vehicles, the companies aim first for practical application in the logistics and transport sectors, where adoption benefits are expected, and plan to conduct demonstration tests on expressways from fiscal 2027 onward. Honda began work on the technology in 2021, and the three-company joint research started in 2025. East Nippon Expressway plans to begin demonstrations of in-motion power supply over roughly 300 meters on the main line near the Kimitsu parking area of the Tateyama Expressway from fiscal 2027 onward, with teams from Honda R&D and Taisei as well as teams from Toyota, Denso, and Obayashi taking part.