Nihon Dengi Co., Ltd. engages in the design and construction of automatic control systems such as building automation and factory automation, as well as the sale of automatic control equipment. It operates through the Air Conditioning Instrumentation-Related and Industrial System-Related segments. The Air Conditioning Instrumentation-Related segment handles the design and construction of air conditioning automatic control systems for office buildings, factories, hospitals, laboratories, schools, non-residential buildings, and commercial facilities. It also sells automatic control panels, sensors, and thermostats. The Industrial System-Related segment deals with instrumentation work and automatic control work for factories and transfer lines for food factories. It also sells control equipment such as controllers, flowmeters, and industrial valves. The company was founded on September 26, 1959 and is headquartered in Tokyo, Japan.