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Answers to frequently asked questions can be found on our "Investor FAQs" page. Please look at this section before contacting us.

Investor FAQs

For general questions about KDDI, Please refer to the "Contact Us" page.

Contact Us

For general questions about au mobile phones, Please refer to the "au customer support" page.

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Some questions will require a certain amount of time to answer. Please understand we will be unable to answer certain questions.

Please attach your name, address and phone number to all inquiries. This ensures we can contact you directly if required. We adopt a policy of strict secrecy with such information.

Please refrain from posting responses to your questions on the Internet or otherwise reusing them.

For other information regarding the extent of KDDI's liability for information on this site, please refer to the "Disclaimer" page.


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