丸善 MARUZEN MARUNOUCHI BOOKSTORE
Big bookstore right in front of Tokyo station, Maruzen 3rd floor, “Gakusan” corner, you will find a large space for kids’ educational books and puzzles including 賢くなるパズル= kenkenpuzzle (published in Japan are the original handmade by Miyamoto brain) and Kyoiku-puzzle #強育パズル by #宮本哲也 #tetsuyamiyamoto .
Lots of similar entitled books, but watch out, the one and only are by Tetsuya Miyamoto, the original.
Thanks to Discover @discover_21Mr. Mitani and his sales team and super advisor, Ms. Shimada