Taisei Co., Ltd. engages in the provision of building management and maintenance services such as cleaning, facility inspection, construction, renovation, and security. Its operations are carried out through the following segments: Cleaning Business, Equipment Management Business, Security Business, Renewal Business, and Real Estate Solutions Business. The Cleaning Business segment offers cleaning services for buildings and bed-making services for hotels. The Equipment Management Business segment provides management services to operate and maintain electricity, air conditioning, water supply and drainage, and elevators of buildings by human and mechanical power. The Security Business segment handles security guard services by fusing manpower and mechanical systems. The Renewal Business segment examines, plans, designs, repairs, and reconstructs buildings. The Real Estate Solutions Business segment offers management of public facilities by acting as an agent and deals with private finance initiative and solar power generation businesses. The company was founded by Isao Kato on October 2, 1959 and is headquartered in Nagoya, Japan.