"Todai Matsumaru-shiki Suuji Nazotoki: Tanoshimi-nagara Kangaeru Chikara ga Tsuku!" (University of Tokyo's Matsumaru-style Number Puzzles: Develop Thinking Skills While Having Fun!) Ryogo Matsumaru Price: ¥1000 Thank you for viewing. *This item has been stored at home. *Please purchase with the understanding that it is a used item. To prevent any issues, please refrain from purchasing if you are overly concerned about condition or are seeking a perfect item. We do not accept cancellations, returns, or refunds. *Shipping will be in simple packaging.