You can delete your account as follows.
1. Press [Account] -> [Account Settings] -> [Delete Account] -> [Next].
2. When the "Steps for Delete Account" screen appears, select the relevant questionnaire items and press "Delete Account".
Attention
Your data will be retained for 30 days after you complete the procedures for deleting your account just in case the deletion was done by accident.
Until the data is completely deleted, you will not be able to register again using the same email address.