FAQ

How do I backup my game?
Go to Options > Data Transfer Registration (データ引継ぎ登録, the sixth icon with the two phones).

Scroll down and tap the white button to accept the Terms of Service. Tap the SQUARE ENIX ACCOUNT button. From now on it's in English so you shouldn't have any problem. You can either login with your own account or register for a new one. After you login in, you will be asked to input your account's email. A confirmation mail will be sent to your address. Click the link in the email. Your Square Enix Bridge account is now linked to your Tokyo Dolls account and your data are backed up. Going back to the game you should see this screen: