General Inquires
info@comsourceone.com

ComSourceOne, Ltd.
Level 3 Festa Bldg. 2-10-7 Kajicho, Kanda
Chiyoda-ku, Tokyo
Japan 101-0044

Main Telephone: 81 (3) 5207-7400 - within Japan: 03 5207-7400
Main Fax: 81 (3) 5207-7401 - within Japan: 03 5207-7401




ComSourceOne, Ltd. (System Engineering Office)
Level 6 First KK Bldg. 1-34 Sudacho, Kanda
Chiyoda-ku, Tokyo
Japan 101-0041


ComSourceOne, Ltd. (Yokohama Support Office)
Level 2 Sakaigi Honcho 5-21
Hodogaya, Yokohama
Japan 240-0033


General Network/System Support
support @comsourceone.com

For emergency network, server or system assistance, please call
emergency number provided in your support contract.



Network Information and Maintenance
networks @comsourceone.com

For hosting systems, email systems, data center customers,
if you require 24-hour assistance or to report a problem, please call
the network services support number provided.
This number can be found on the top of your services contract.



Software Support
software @comsourceone.com


Career Opportunities
careers @comsourceone.com

Please see the additional information
on our career pages, or contact us through
general inquires by email, fax, mail or telephone.


Investment Information
investment @comsourceone.com

Please see the additional information
on our investment pages, or contact us through
general inquires by email, fax, mail or telephone.


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