This is an unused postcard set of the Tower of the Sun from the Osaka Expo, purchased at the Taro Okamoto Exhibition. The set contains 5 postcards in a case. They have been stored in a dark place, except for when they were taken out of the case for these photos. Why not take them to the 2025 Osaka-Kansai Expo and observe the differences from back then, or mail them from a postbox at the Expo site? I will sell these to someone who understands that they have been stored at home. #OsakaExpo