You can change your au ID password on the "au ID Membership Information Site" [au ID会員情報サイト].
For detailed instructions, please refer to the steps below.
Access the "au ID Membership Information Site" [au ID会員情報サイト] and log in with your au ID.
Tap on "au ID Member Information" [au ID会員情報].
Tap on "Change" [変更] in the "Password" [パスワード] section.
Enter your current password and tap on [OK].
Enter your new password and tap on "Set" [設定].
(Including symbols/ not including date of birth, name, or phone number/ one that is not used on other websites, etc.)
The process is now complete.
Tap on "Back" [戻る] to return to the "Membership Information" [会員情報].
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