There are three main categories that can be used to describe the way a Japanese puzzle box opens. These sequences, shown below, apply to standard “box” shapes.
We have not included the movement associated with Karakuri Cubes as they have their own sequences not usually seen in the general boxes.
Keys and Panels
By far the most common opening sequence is one that uses panels and keys. The keys are the narrow pieces of wood at each end of the box. To open, one of the keys is moved to the left or right about 5-10mm. This will then release the end to move. Depending on the size of box you may need to move a key on the opposite end. After various movements of keys/ends/top, the top can then be removed. The base doesn’t usually move at all apart from some boxes which have a double compartment.
Depending on the size of the box there may be anything from one to twelve keys. The twelve keys are called split keys because instead of a single sliding piece, they are cut to two which move left and right independently of each other.
This movement can be seen here.
Panels only
You will usually find this type of sequence on the smallest boxes that have 14 or 18 moves. They do not use keys at all and are opened by a move and rotate type of action. An end is usually moved first, that releases the base, that releases the other end which in turn releases the top. Then on to the first end again and so on until the top can be removed.
This type of box would not confuse a puzzler because once the first move is made the rest just fall into place. However, the craftsmanship involved in these small boxes is absolutely amazing and has to be seen to be believed.
New Move - The Third Category
To be truthful there isn’t really a third category at all. Boxes that come under this section are usually described as New Move and include anything that does not come under the first two headings. The craftsmen will sometimes make a box which opens using an unusual sequence (often limited editions) or even incorporates the use of magnets.
