Corporate History
As a leader in the telecommunications construction industry, the COMSYS Group has grown by contributing to the construction and operation of Japan’s information and communications infrastructure, which is renowned for its world-class quality.
Going forward, we will contribute to a sustainable society by continuing to build the telecommunications and social infrastructure that supports safer, more secure, and prosperous lives.
Comsys Holdings Corporation was established as a pure holding company through a joint stock transfer by Nippon Comsys Corporation, Co., Ltd. Sanwa Elec (currently SANWA COMSYS Engineering Corporation), and East Japan System Construction Co., Ltd. (currently TOSYS Corporation)

Delisted from the First Section of the Tokyo Stock Exchange and the Osaka Stock Exchange (currently the Osaka Exchange)
Established COMSYS Shared Services Corporation and outsourced common operations.
Converted COMSYS Shared Services Corporation into a wholly owned consolidated subsidiary
The information systems business was spun off to form COMSYS JOHO SYSTEM Corporation
Changed the unit share number from 1,000 shares to 100 shares
Completed a business integration with TSUKEN Corporation through a share exchange.
Delisted from the Osaka Stock Exchange due to its stock market integration with that of the Tokyo Stock Exchange
Transitioned from a company with Statutory Auditors to a Company with an Audit and Supervisory Committee.
Completed a business integration with three companies through a share exchange: NDS Co., Ltd., SYSKEN Corporation, and Hokuriku Denwa Kouji Co., Ltd. (currently HOKUWANEX Co., Ltd.)
Changed its listing on the Tokyo Stock Exchange (TSE) from the First Section to the Prime Market segment