Okumura Corp. engages in the construction and real estate businesses. It operates through the following business segments: Civil Engineering, Architectural Construction, Investment Development, and Others. The Civil Engineering and Architectural Construction segments include public works, architecture, and other general construction services. The Investment Development segment handles renewable energy business and real estate sales and leasing. The Others segment covers the manufacture and sale of construction materials and equipment. The company was founded by Tahei Okumura on February 22, 1907 and is headquartered in Osaka, Japan.