Kumagai Gumi Co.,Ltd. operates as a construction company in Japan and internationally. The company constructs tunnels, roads and bridges, railways, dams, and airports/marine ports, as well as water and sewerage, environmental, energy, renewal, ICT civil engineering, housing/mansion, office/government, hotel, commercial, culture, education/research, sports/entertainment, medical/social welfare, plant, distribution, timber and other projects. It also engages in the production of asphalt mixture and the paving of roads, airports, ports, and bridges; building renovation business, including building survey/diagnosis, antiseismic diagnosis/antiseismic reinforcement, and the formulation of long-term renovation plans, as well as manufacture of steel products for shield tunnels and construction machinery; and operates a leasing business for a steel construction. In addition, the company offers construction and building plans; software services utilizing CAD and information systems to create construction plans, applications, and building plans; education on CAD operations to universities and construction companies; outsourcing services; and insurance agency services. Further, the company operates as a technology trading company for construction industry. Kumagai Gumi Co.,Ltd. was founded in 1898 and is headquartered in Tokyo, Japan.