NITTOH CORPORATION is a construction company that has three business segments. The Construction Work segment is engaged in utilities construction including gas-related housing facilities, photovoltaic generation systems, air-conditionings, water supply and sewerages; various reform work including construction, design, construction management of detached housing, the sale, mediation, renovation of real estate, care and earthquake resistant reform work. This segment is also engaged in the water proofing construction, such as fiber-reinforced plastic (FRP) and sheet water proofing, revamping water proofing, and others. The Housing Service segment offers services such as the prevention, eradication and re-prevention of termites, the prevention of moisture, the control of pests, as well as the cleaning of housing, offices and stores. The Building Maintenance segment provides cleaning services for building windows and outer walls, as well as condominiums and public facilities.