Yosengi Woodwork to Create Japanese Secret Trick Puzzle Box Called Himitsu Bako : "Secret Box"

IZUMIYA - Hakone Yosegi Zaiku - Himitsu Bako - Japanese Secret Trick Puzzle Box - ONLINE SHOP:
5 Sun 21 Step Mawariyabane (Yosegi Japanese Secret Puzzle Box )
Japanese Secret Trick Puzzle box, called "Himitsu-bako": "personal (secret) box".
Yosengi is the name of the Japanese style of parquetry to create geometric patterns.
This box required 21 moves to open