1. Viewing and changing your account information
You can view or change your display name, profile, language, notifications, and other editable information on the Service's "Settings" screen. For information you cannot change there, please contact us using the details below.
2. Deleting your account
- After signing in, open "Account" on the "Settings" screen and select "Delete account" to request deletion. For your security, we may ask you to sign in again.
- Once your account is deleted, you can no longer sign in. Directly identifying information such as your name, email address, profile image, and authentication information is deleted or replaced, and the account is anonymized. Any remaining coins are forfeited.
- Records needed to keep the Service consistent, such as coin grant and usage records, fraud-prevention records, and learning and gameplay history, may be retained after directly identifying information is removed or pseudonymized, as required by law or legitimate business needs.
- Account deletion generally cannot be undone. It may take a reasonable period for deletion to be reflected in backups and in our service providers' systems.
3. Advertising and cookie settings
- You can delete or block cookies in your browser settings. If you disable cookies required for signing in, parts of the Service may not work.
- If you have an X account, you can limit ad personalization in X's "Privacy and safety" settings.
- If you have a Meta (Facebook, Instagram) account, you can limit ad personalization in Meta's "Ad preferences".
Even if you change your browser or these companies' settings, processing needed for security, fraud prevention, providing the Service, or aggregated measurement may continue.
4. Notifications and marketing email
- You can turn push notifications on or off and choose their types (Daily 5, campaign info, etc.) under "Notifications" on the Service's "Settings" screen. You can also stop all notifications from the Service in your browser or device notification settings.
- You can stop marketing email under "Notifications" on the "Settings" screen or through the link in the email.
We may continue to send messages needed to operate the Service, such as security and account notices, after you stop marketing messages.
5. Data requests
You, or your lawful representative, may request, in accordance with applicable law, notification of the purposes of use, access, disclosure of third-party provision records, correction, addition, deletion, suspension of use, erasure, or cessation of third-party provision of the personal data we hold about you.
To make a request, email info@cloviz.co.jp with the following:
- The email address or user ID registered with Mahjong Q'z
- The request you wish to make
- Information needed to verify your identity and contact you (for requests by a representative, including documents confirming the authority to act on your behalf)
To prevent impersonation, we may ask for additional identity verification. We may be unable to fulfill all or part of a request if the law does not allow it or if it would affect the rights or safety of others or fraud prevention. In that case, we will explain the reason to the extent permitted by law.
6. Response time and contact
We will respond within a reasonable period, depending on the request and applicable law. If you disagree with our response, or for settings not covered on this page, please contact our Personal Information Inquiries desk below.


