Thank you for viewing! ☺️ Please check the profile section before purchasing ✨ - Title: The Book That Allows Elementary School Students to Do 19x19 Mental Calculation in Just One Day - Price: 1100 yen - Diamond Inc. I bought this because my child was interested in it at the bookstore, but I kept it without using it. It's an unused workbook. There are no writings or markings. Because it was stored at home, there may be slight scratches on the cover and corners. Please check the condition in the photos. It's in a clean condition, but since it's a home-stored item, please purchase only if you understand. Feel free to comment if you have any questions ☺️✨