"All-Color Manga: Build Confidence in Math! The World of Numbers: So That's How It Is! An Introductory Book for Children and Adults to Learn Easily" Masahiko Saida Price: ¥1,000 This book introduces arithmetic to elementary school students through manga. It's a beautiful item, having only been read once. ⭐︎Please understand that this item has been stored at home. Available for immediate purchase (^^)