This is a notebook from the 1970 Japan World Exposition (Osaka). It has been stored at home for over 50 years. When the price tag on the cover was removed, part of the notebook surface also peeled off. Information about the Expo is included at the beginning and end. It is old and shows signs of aging, but it is unused. A memory of the Showa era. How about a look back at the Osaka Expo?