This is the textbook training for the Dai Nippon Tosho edition of "New Edition: The World of Mathematics." It's for first-year junior high school students. I'm selling it because I bought it but never had a chance to use it. The inside is clean, with no writing or markings. The CD supplement is also included. However, please understand that there is a slight wrinkle on the edge of the cover, although it's not very noticeable (see photo 7). Please note that this item has been stored by a private individual. #Mathematics #JuniorHighSchool1stGrade #TextbookTraining #DaiNipponTosho #KyotoRe