Nippon Koei Co., Ltd. engages in the business of construction consulting and power engineering services. It operates through the following segments: Domestic Consulting, Overseas Consulting, Power Engineering, Urban Space, Energy, Real Estate Leasing, and Others. The Domestic Consulting segment consists of consulting services related to survey, planning, design, and supervision of domestic social capital improvement. The Overseas Consulting segment provides consulting services related to survey, planning, design, and supervision of overseas social capital improvement. The Power Engineering segment manufactures and sells water turbine generators, system control equipment, and transformers; engages in construction of substations and transmissions; and offers electromechanical consulting services. The Urban space segment provides planning and design of urban space. The Energy segment comprises of research, development, design, construction, management, operation, support, system and technology development of power generation, and energy management business utilizing distributed energy resources. The Real Estate segment leases and manages real estates properties, and operates insurance agency services. The Others segment includes experiment on physiology, soil and environmental science, and consignment work utilizing experiment facilities and business support. The company was founded on June 7, 1946 and is headquartered in Tokyo, Japan.