Watanabe Sato Co., Ltd. engages in the contract, research, design, and supervision of pavement and civil engineering works. It operates through the following business divisions: Construction and Product Sales. The Construction division surveys, plans, designs, and builds pavement and civil engineering construction works. The Product Sales division manufactures and sells asphalt mixtures and related products. The company was founded in December 1923 and is headquartered in Tokyo, Japan.