Toenec Corp. engages in the business of construction services. It operates through the following segments: Facility Construction, Energy and Others. The Facility Construction segment provides distribution line construction, underground construction, communication work, indoor wiring work, and air conditioning pipe construction. The Energy segment operates photovoltaic power generation business, air conditioning system service, and energy service company (ESCO) business. The Others segment handles product sales, rental leasing and property insurance agency business. The company was founded on October 1, 1944 and is headquartered in Nagoya, Japan.