Please click on the Expo ID login link below, click on "Forgot Expo ID?", enter the necessary information and proceed.
If you have registered your Expo ID by proxy registration, please confirm your Expo ID with your proxy registrar.

Expo ID login:
https://usrmng.accounts.expo2025.or.jp/idmng/users/screen/menuScreen

[Reference] How to check your Expo ID and reset your password (manual):
https://www.expo2025.or.jp/wp/wp-content/themes/expo2025orjp_2022/assets/pdf/tickets-index/id_problem_solving_manual_en.pdf