★ Supervisor Yasuhiro Kanokogi is a professor at the Graduate School of Human Sciences, Osaka University. He researches infant cognitive development, gaze tracking, and the emergence of morality.
★ Author Mametarou is a CG artist. He uses 3DCG technology to create “rough squares, bumpy circles, and fluffy triangles,” giving these shapes texture.
★ This is not just a “learn shapes” book, but a “touch shapes” book. Babies see a rough square and want to reach out; they see a fluffy triangle and want to feel it with their fingers. Geometric shapes become characters with personality, and babies want to turn the page themselves.
★ Board book format, suitable for ages 0–2. The geometric shapes used—circle, triangle, square—are shapes proven in infant research to attract babies’ attention most. If your baby isn‘t interested in ordinary picture books, try this one.

The geometric shapes used in infant research around the world have become characters that make you want to reach out and touch!
Rough squares, bumpy circles, fluffy triangles...
Simple yet striking shapes and their textures will surely fascinate babies!
Supervised by Yasuhiro Kanokogi, a researcher in infant cognitive development.
This is a board book that “babies themselves become interested in and pick up on their own.”

Supervisor: Yasuhiro Kanokogi
Researcher in infant cognitive development. Professor at the Graduate School of Human Sciences, Osaka University.

Author/Illustrator: Mametarou
CG artist. Major works include “Purin Poyon.”