Suido Kiko Kaisha, Ltd. engages in manufacture, installation, and sale of machinery and water treatment equipment in Japan and internationally. It offers various water treatment equipment, such as water generators and purifiers, indicator controllers, automatic valves, and digital residual chlorine measurement devices. The company also engages in the design and construction of water treatment, waterworks and industrial water supply, sewerage and small scale sewage treatment, industrial water and wastewater treatment, rural community water and sewerage, sludge reclamation, and sanitary landfill leachate treatment plants; design, manufacture, and sale of water treatment facility equipment and devices; operation, maintenance, and management of water treatment plants and facilities; and production and sale of industrial and chemical agents. In addition, it provides water quality inspection analysis and worker dispatching services. The company was incorporated in 1936 and is headquartered in Tokyo, Japan. Suido Kiko Kaisha, Ltd. operates as a subsidiary of Toray Industries, Inc.