E-mail Support

1 Enter required items.

* About the handling of personal information

Please be aware of the following situation in advance.

  • We'll try to respond you to your E-mail address as soon as possible.
    However, in some cases, we may not be able to give you a quick answer.
  • We'll answer an inquiry concerning the services KDDI offer except au.
    • ・In some cases we might not be able to give you an appropriate answer up to content of inquiry.
    • ・Change of your subscription contents will be available on My au. (in Japanese Only)
    • ・For KDDI Customer Center phone number, click here.
    • ・For inquiry concerning au mobile, click here.
  • The contents of our answer may not be copied or quoted.

Items with are required.

Inquiry Category[Required]
E-mail address for a Reply[Required] (Ex:xxxxxx@***.com) Enter an E-mail address to reply.
Reconfirm your E-mail address[Required] (Ex:xxxxxx@***.com) Enter E-mail address again to confirm.
Your Name (Subscriber's name for KDDI Customer.)

* Business customers, enter company name.

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