Interesting article about the future locations bidding for Expo hosting duties and some recent announcements about Japan.
With fewer than 1000 days to go till opening, 130 countries and regions have confirmed participation in Expo 2025, putting it close to its goal of 150. By way of comparison, the past two world’s fairs on this scale were Dubai 2020 (192 participants), and Milan 2015 (145 participants).
Source: https://www.inparkmagazine.com/world-expos-planned-and-proposed-through-2030/