Maezawa Industries, Inc. engages in the manufacture, sale, and installation of equipment for water supply and sewerage systems. It operates through the following segments: Environment, Valve, and Maintenance. The Environment segment deals with sewage water treatment, industrial water treatment, soil and groundwater decontamination, and organic waste recycling facilities. The Valve segment handles business related to water and sewage valves, plugs, and gates. The Maintenance segment handles repair, installation, and maintenance of water and sewage facilities and equipment. The company was founded by Keiji Maezawa on July 15, 1937 and is headquartered in Kawaguchi, Japan.