Welcome.This site is a directly managed online-shop of OKA CRAFT. We specialize in Japanese puzzle boxes (Himitsu-Bako)!**We will pause shipping operations from December 28th to January 5th. Shipping for 2025 will resume on January 6th.**

3 sun size

3 sun size is the traditional (old) Japanese measurement. It is no longer used in daily life in Japan. It is equivalent to 9 centimeters or 3.5 inches. It is popular as a small box with palm-sized. The 3 sun box was a size never seen before in the history of Japanese puzzle box. so I started making boxes of this size in 2004. The photo shows the structure of 3 sun boxes.