COMSYS Holdings Corp. engages in the management of its group companies which are in the telecommunications business. It operates through the following segments: Nippon Comsys Group, Sanwa Comsys Engineering Group, Tosys Group, Tsuken Group, Comsys Joho System Group, and Others. The Nippon Comsys Group segment handles the telecommunication facility construction with focus on Nippon Telegraph and Telephone Corp. The Sanwa Comsys Group segment offers telecommunications engineering to new common carrier. The Tosys Group segment provides telecommunication engineering in the Shinetsu region. The Tsuken Group segment provides telecommunication engineering in the Hokkaido region. The Comsys Joho System Group segment deals with information processing-related services. The Others segment covers temporary staffing and shared services. The company was founded on September 29, 2003 and is headquartered in Tokyo, Japan.