You can change the first and last name 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 the first and last name
5. Enter the first name in the “First Name” field
6. Enter the last name in the “Last Name” field
7. Enter your password to confirm the changes and press “Save Changes”.