NJS Co., Ltd. engages in the planning and supervision of water supply, sewerage, river, agricultural drainage, wastewater treatment, raw sewerage and waste treatment facilities. It operates through the following segments: Domestic, Overseas and Others. The Domestic and Overseas segments handles businesses related to water supply, sewer and environment. The Others segment manages real estate rental business.The company was founded on September 3, 1951 and is headquartered in Tokyo, Japan.