TOA Corp. (1885) engages in the planning, design, execution and supervision of civil engineering and architectural works, and consulting services. It operates through the following business segments: Domestic Civil Engineering, Domestic Construction, Overseas Business, and Others. The Domestic Civil Engineering segment handles the work, design and contracts of civil engineering. The Domestic Construction segment engages in the planning, designing, supervision and contract works for regional, urban and ocean development. The Overseas segment provides general overseas contracts. The Others segment includes real estate business, construction machinery manufacturing, sales and repair business, and private finance initiative (PFI) business. The company was founded by Soichiro Asano in 1908 and is headquartered in Tokyo, Japan.