Nippon Koei Co., Ltd. is mainly engaged in the consulting business and power engineering business. It operates in six business segments. The Domestic Consulting segment is engaged in the investigation, plan, appraisal, design, construction management and operation for development of water resources, electrical sources, agriculture development, urban and regional development in Japan. The International Consulting segment engages in the same business as the domestic construction segment in overseas markets. The Power Engineering segment engages in the manufacture and sale of water turbine generators, system control equipment, transformers, construction work of electrical power transmission and transformation. The Urban and Spatial Development segment engages in the urban planning and architecture development business. The Energy segment engages in investigation, development, design of power generation and energy management project. The Real Estate segment leases and manages real estates.