General contact information

General inquiries

Tel: 81-3-6667-1111


IBM Japan Ltd
19-21 Nihonbashi
Hakozaki-cho Chuo-ku
Tokyo 103-8510


Technical Support

Electronic service requests can be submitted for hardware or software under warranty or with a support contract.

IBM Hardware Support
Tel: 0120-34-00001
Tel: 043-333-3037

IBM Software & Platform Computing2 Support
Tel: 0120-557-9711

Exceptional Software Support:

Rational & AppScan Family Support 
Tel: 0120-016-1901

Sterling Collaboration Network (SCN) Support 
Tel: 0120-115-3531

Security Systems (Proventia family) Hardware Exchange 
Tel: 0570-200-467

System Software Support
AIX, OS/400, Storage
Tel: 0120-557-931​1

s/390 Platform Support
Operating System and Middleware
Tel: 0120-03-7777​1

IBM DMS Softek Support
Toll Free: 010-800-667-63835

Customer support

Contracts, orders status, delivery, inventory, invoices and payments.

1 Toll Free number only valid for calling from Japan.
2 The reception desk is carried out in Japanese, but the technical support (callback) is carried out in English. For SR, Please fill in the inquiry contents in English.