You can change the email address linked to your Rakuten account by accessing your Address Book.
Accessing your Address Book
To access your Address Book, please:
1. Click the "My Account" drop down menu located at the top of any page and sign into your account.
2. Once signed in, click on “My Account”.
3. Click "Account Settings" from the menu located on the left side of the page.
4. It will then bring you to the “Account Settings page where you can change your email address.
5. Enter the new email address in the “Email Address” field.
6. You will need to select either “Use email address” or “Add a Rakuten ID” in the “Rakuten ID” field. If you select Rakuten ID, you will use that instead of your email address to sign into your account.
7. Enter your password to confirm the changes and press “Save Changes”.