Hirofumi Yamasaki

Nippon COMSYS Corp. provides telecommunications infrastructure services. These includes fiber optic cable installation, cable tunnel construction, and wireless communications base station construction. It also offers general civil engineering services and building construction. The company was founded in December, 1951 and is headquartered in Tokyo, Japan.

Tsuken Corp. engages in the information and telecommunications business. It operates through the following divisions: Telecommunication Equipment, Telecommunication Services, and Sales Leasing. The company was founded on April 2, 1951 and is headquartered in Sapporo, Japan.

Part of COMSYS Holdings Corp., TOSYS Corp. is a Japanese company that specializes in information and telecommunications equipment and electrical equipment. The company is based in Nagano, Japan. TOSYS integrates the telecommunications business of the wired network, from the design of analog communication equipment to digital communication equipment construction and maintenance. Founded in Niigata prefecture in January 1960, the company has since expanded to provide total support for information and communication systems.

COMSYS JOHO SYSTEM Corp. engages in the planning, design, development, construction, maintenance, operation and management of information systems. It also provides the information processing services, outsourcing services using information technology, telecommunication facilities, worker dispatching business and others. The company was founded on April 1, 2009 and is headquartered in Tokyo, Japan.