First, try refreshing your email application (e.g. Yahoo! Mail).

If you still do not receive the message, you may have opened Expo ID in your email application (e.g. Yahoo! Mail).

First, open one of the recommended browsers (Safari, Google Chrome, or Microsoft Edge) then copy and paste the URL below, enter your Expo ID and password and log in.
Expo ID login:
https://usrmng.accounts.expo2025.or.jp/idmng/users/screen/menuScreen　

Afterwards, select "Authentication by Email" and try to receive the email by refreshing your email application. The most recent email received from Expo ID will contain six digits, please enter those six digits in the Expo ID screen.

For information on how to set up the recommended browsers, please refer to section "2.3 Setting Up a Supported Browsers" in the Expo ID Registration Manual below.
Expo ID registration manual:
https://www.expo2025.or.jp/wp/wp-content/themes/expo2025orjp_2022/assets/pdf/tickets-index/id_registration_manual_en.pdf　

Paper tickets/ticket vouchers are also available.
Paper ticket/ticket exchange ticket website:
https://www.expo2025.or.jp/tickets-index/voucher/　
(Please note that this page is only available in Japanese)