You can use it by following the steps below.

(1) For those who have purchased a full-year pass or summer pass and will be using a credit card

1. Register your face on the face registration site.

2. Activate the face recognition payment service on the face registration site.

Please see below for detailed instructions.
https://introduction.expo2025-myaku-pe.com/pay/face/manual/pdf/%E3%83%9F%E3%83%A3%E3%82%AF%E3%81%BA%EF%BC%81%E9%A1%94%E6%B1%BA%E6%B8%88%E7%99%BB%E9%8C%B2%E3%83%95%E3%83%AD%E3%83%BC_%E9%80%9A%E6%9C%9F%E3%83%91%E3%82%B9%E3%83%BB%E5%A4%8F%E3%83%91%E3%82%B9%E7%B7%A8_250512.pdf

(2) For those who use  Myakupe!
Please check the Myakupe! FAQ for registration instructions.
https://bqa.smbc.co.jp/faq/show/5348?back=front%2Fcategory%3Asearch&category_id=332&commit=&keyword=%E9%A1%94%E8%AA%8D%E8%A8%BC&page=1&site_domain=expo2025-myaku-pe&site_id=12&sort=sort_keyword&sort_order=desc