Nihon Suido Consultants Co., Ltd. provides construction consulting services for water supply and sewerage infrastructure in Japan and internationally. Its consultancy services include concept, survey, study, plan, design, construction supervision, O&M, management, financial analysis, and water quality analysis for water supply, sewerage, sanitation, flood control, water resource management, industrial wastewater, solid waste management, urban and rural area planning and development, and renewable energy, as well as water environment management for river, reservoir, and coastal areas. The company was incorporated in 1959 and is based in Tokyo, Japan.