Norio Suda

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.

Part of COMSYS Holdings Corp., SANWA COMSYS Engineering Corp. is a Japanese comprehensive engineering company for information and communication, offering faster and more optimal total solutions from consulting to maintenance. The company is based in Tokyo, Japan. SANWA COMSYS Engineering, also known as sankom, contributes to the future of the smart society by providing a range of services including consulting, proposals, design, construction, operation, and maintenance for information and communication and electrical facilities.

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.

Nippon Telegraph & Telephone East Corp. provides regional telecommunications services. It offers telephone service applications and changes, billings and payment solutions, discount options, optional services, Internet services, wireless communication network services and business network. The company was founded on July 1, 1999 and is headquartered in Tokyo, 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.

Oscar Technology Corp. develops software solutions and consulting services. It offers parallelization, evaluation and multi-core parallelization seminar services. The company was founded by Katsuhiko Shirai, Takahiko Ono, Shuichi Matsuda, and Hironori Kasahara on February 28, 2013 and is headquartered in Tokyo, Japan.

Nippon Telegraph & Telephone West Corp. provides regional telecommunication services in the western parts of Japan. The firm's activities include telephone services, integrated digital communications services, leased circuit services and other telecommunication-related activities. The company was founded on July 1, 1999 and is headquartered in Osaka, Japan.

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.