Takasago Thermal Engineering Co., Ltd. engages in the design and development of heating, ventilation, and air conditioning (HVAC) systems. The company is headquartered in Shinjuku, Tokyo-To and currently employs 5,858 full-time employees. The firm has two segments. The Equipment Construction segment involves in the maintenance and general management of equipment, the design and construction of air conditioners, water supply and drainage facilities, technical assistance to overseas subsidiaries as well as the manufacturing, sales and installation of cleanroom related equipment and interior materials. The Equipment Manufacturing and Sales segment is engaged in the design, manufacturing and sales of air conditioners. Other business involves in the sales and leasing of real estates and insurance agency business.