This is a Myakumyaku backpack from the Osaka Expo. If you buy souvenirs in advance and put them in this backpack, then wear it while waiting in line at the pavilions, it's easy, eye-catching, and full of fun! I only used it once at the Osaka Expo. For those going in the future, it's very convenient to have, as you can put your souvenirs in it. I bought it at the official Expo shop.