A reference book that clearly explains the math concepts covered in elementary school (grades 1-6) in Japan. - Title: Answering "Why?" Elementary School Math for 6 Years - Author: Masahiko Saida - Publisher: Natsume-sha - Price: 1400 yen (excluding tax) - Size: A5 size Purchased at a bookstore, but I accidentally bought two copies, so I haven't read this one. Overall, it's in good condition, but please understand that it's a used item. Packaging: Waterproof vinyl + cushioning material + envelope Shipping: Yu-packet Post or Yu-packet Post mini Instant purchase is OK. Even if there are comments, I will prioritize the person who makes the purchase. This item is stored at home. No pets or smokers. If you have any questions, please ask before purchasing. Feel free to ask about combined sales. #kirinaAllProducts #kirinaBooks I am selling various items due to decluttering.