Tell me what I should do after I log-in on my web area.
It is easy. First, login our webpage with your account, and see your account information.
You will see a link entitled "○○○○ さん、ようこそ！| ログアウト" at the top of each page.
Click "○○○○", and you will find your account information.
Then click "Edit", change your e-mail address in the "Email" box, and click "Save" at the bottom.
(Last updated 2024 or before)