You can reset your password by clicking "Forgot password" on the login page (https://usrmng.accounts.expo2025.or.jp/idmng/users/screen/menuScreen).
On the ‘Reset password’ page, enter your Expo ID, first name, surname, email address, and date of birth.
If you see a message that reads "No ExpoID matched the entered information. Please check to see if the entered information is correct." and are still unable to reset your password after making sure that your details are correct, please contact us via the following link.

https://forms.office.com/r/Vn9SqwTZJM