The First Energy Service Company, Limited is an energy service company. The Company operates through two business segments. The Energy Conservation Support Services segment is involved in the investigation and diagnostication of the energy usage for corporation customers, as well as the design, construction and operation of energy conservation facilities and systems. The Green Energy segment is engaged in the development, construction and operation of new energy power plants, which use woody biomass as the energy source. On July 31, 2013, the Company acquired a Tokyo-based company.