Koatsu Kogyo 

Koatsu Kogyo Co., Ltd. designs and constructs pre-stressed concrete (PC) bridges and tanks in Japan. It also designs, manufactures, and sells concrete products; and, civil engineering work, foundation piling, etc. In addition, the company leases concrete product formworks; manufactures and sells construction materials; designs, constructs, supervises, and contracts civil engineering and construction works; and provides real estate buying and selling, leasing, exchange, management, and brokerage services. Further, it develops residential land; and generates and sells solar power. The company was incorporated in 1959 and is headquartered in Kagoshima, Japan.