Ohmori Co., Ltd. engages in civil engineering and construction businesses. It operates through the following segments: Construction, Real Estate, Communication-Related, and Others. The Construction segment builds, supervises, and offers contract operations for building construction and civil engineering works. The Real Estate segment buys and sells land and buildings; and handles OLY lease business, a method of digging and road surface lining work using L-shaped steel plate. The Communication-Related segment performs maintenance and management work within the NTT station. The Others segment covers the closet rental business. The company was founded on June 13, 1967 and is headquartered in Tokyo, Japan.