The Osaru no Kagoya box tells a story about two monkeys that need to bring the palanquin from Odawara Castle to one of the 2 points (Hakone or Gora).
It based on the nursery rhyme written around 1938 by Takeo Yamagami, a young poet who specialized in writing songs for children.
The story is about a struggle of a long journey and about overcoming problems on your way to the ultimate goal.
Box’s mechanism is quite simple, there is a magnet on the other side of the lid and all you need to do is to take the small plaque with 2 monkeys and bring them from the right side to the left.
That will also move the mechanism and will get the box open.
This karakuri box is much bigger than the usual ones, so it is very popular among people who’d like more practical use to their puzzles. Safe to say, is you store something precious in that box — no one can open it, unless you will share the secret behind the mechanism with them.