Kumagai Gumi

Kumagai Gumi operates as a construction company in Japan and internationally. The company constructs roads and bridges, railway stations and tunnels, energy facilities, sewage and water projects, offices, residential buildings, hotels, government offices, hospitals, factories, educational facilities, exhibitions, skyscrapers, and airports. It also undertakes other civil engineering and architecture works. In addition, the company is involved in the production and sale of construction machinery and materials; construction of underground diaphragm walls and noiseless vibration-free piles; installation of building equipment; and consulting and reform building businesses.