Nippon Denki Co., Ltd. designs, constructs, and maintains automatic control systems for building automation (BA) and factory automation (FA), serving non-residential facilities such as office buildings, hospitals, research institutes, and commercial complexes. The company operates two core segments: the Air Conditioning Instrumentation segment, which covers HVAC automatic control system installation and control equipment sales (including control panels, sensors, and thermostats), and the Industrial Systems segment, which handles instrumentation and automation works for factories and conveyor lines—particularly food and pharmaceutical manufacturers—along with production management system sales through its consolidated subsidiary Jupiter Advance Systems Co., Ltd. The company holds a Minister of Land, Infrastructure, Transport and Tourism license as both a specified and general contractor under the Construction Business Act, and has established a broad domestic branch network spanning Tokyo, Osaka, Nagoya, and other major regions.