The Osaka Expo 2025 has opened. More than 28 million people will visit it. The first Expo was in London in 1851. Expos try to answer world problems. The Osaka Expo shows the culture of 158 countries. The theme is "Creating a future society for our lives." In the US area, people can see exhibits on space travel.

The Osaka Expo is on an artificial island. It is in a round building called the Grand Ring. Guinness World Records said it is the world's "largest wooden architectural structure". Visitors can see lots of Japanese culture. There are exhibits on robots, flying cars, and Hello Kitty. Visitors can also see Myaku-Myaku – the Expo mascot.