If you need to update your username or the email address you use on your Rakuten TV account, the first thing you have to do is go to our webpage https://uk.rakuten.tv/ and enter with your existent email and password. If you have any doubts about how to do this, click here to find the answers.
After you log in, you have to go the upper right corner of the webpage, to unfold the menu of your account, and click on the option "Settings".
Inside the Settings menu you will find 4 tabs. In the first one, Profile, you will have the option to change your Email and Username, add your Telephone number and update your existent Password. Remeber to click on the yellow button "Proceed" after updating the necessary information.