COMSYS Holdings Corporation, together with its subsidiaries, engages in information, communications, construction, electrical facilities construction, and information processing-related businesses in Japan. It constructs and maintains equipment for telecommunications carries; installs fiber optic line for households; and built tunnels for underground cables. The company constructs wireless base stations for mobile phones; IT solutions for physical works, such as wirings operations to maintenance and operations services after building, installing networks, servers, and applications; and provides systems for observing and forecasting natural disasters including earthquakes, typhoons, and floods, as well as power generations systems for renewable energy. The company was incorporated in 2003 and is headquartered in Tokyo, Japan.