I would like to register my credit card information to my au ID

You can complete the registration procedure on the au ID Membership Information Site.

Please see below for detailed instructions.

1

Access the
"au ID Membership Information Site" [au ID会員情報サイト]
and log in with your au ID.
2

Tap on "Register" [登録] under "Credit card information" [クレジットカード情報].
3
Enter your au ID password and tap on [OK].

If it does not appear, proceed to the next step.
4

Enter your credit card number, expiration date and security code, then tap on "Next" [次へ].
5

Review the credit card information you entered and tap on "Register" [登録する].
6

The procedure is now complete.

Has your problem been solved?