A.
Please check that the email address you entered is correct.
If you have opted to receive emails, please make sure that your email settings are set to allow emails from the domain "expo2025.or.jp".
Please check that your email settings are set to allow emails from PCs and emails containing links.
There is also a possibility that the emails have been sorted into your spam folder, so please check.
If you still do not receive the email for this registration after checking the above, please try a different email address if you have one.