Nihon Dengi Co., Ltd. engages in the automatic control system business in Japan. It operates through two segments, Air Conditioning Instrumentation Related Business and Industrial System Related Business. The Air Conditioning Instrumentation Related Business segment is involved in the design and construction of automatic air conditioning control system for non-residential buildings, including office buildings, factories, hospitals, laboratories, schools, and commercial facilities, as well as maintenance and inspection after construction. This segment sells equipment for automatic control of air conditioning, such as automatic control panels, sensors, and thermostats. The Industrial System Related Business segment handles instrumentation work and automatic control work for factories and transport lines, including food factories, installation, maintenance, and production management of various FA machines centered on industrial robots. This segment also sells control equipment, such as regulators, flow meters, and industrial valves. Nihon Dengi Co., Ltd. was incorporated in 1959 and is headquartered in Tokyo, Japan.