YamauLtd. 

Yamau Holdings Co., Ltd. manufactures, engineers, and sells concrete products in Japan. The company develops, sells, and maintains information devices; and sells environment-related products. It also engages in the manufacture, construction, and maintenance of water gates and dams; general civil engineering works; and inspection, investigation, and repair of concrete structures, as well as sale of reinforcement materials. In addition, the company is involved in the provision of geological survey and design activities; and construction of steel gates and structures. Yamau Holdings Co., Ltd. was founded in 1953 and is headquartered in Fukuoka, Japan.