Karakuri-Nice packing puzzle

The Karakuri Packing Puzzle was designed by Yasuhiro Hashimoto and  won a Jury Honourable Mention award at the 2023 International Puzzle Party (IPP) design competition. The goal is to pack all 5 pieces, plus 2 dowels inside the box, through the opening in the lid.

UPDATE: March 6, 2026: the original lid was too small for the pieces. The fixed version is lidv2.

This puzzle is about 3/5 for difficulty and exceptional for puzzlers who are looking for a medium level challenge. I've modified the puzzle slightly to use 2 different sizes of dowels, which, I think, makes the puzzle a bit more consistent, for my modelling of the parts. 

The lid of the box can go on in a few ways. You can just set it on top. You can use M3 screws (4mm-10mm long) to hold the lid. You can glue the lid on. It is recommended to use screws, since there is another puzzle coming that uses the same box, but a different lid. (See Packing Puzzle of Distinction)

Everything can be printed at 0.2 or 0.3mm layer height, depending on the quality desired. Note there are two different peg heights. 

I used layer height color changes for the lettering and for the peg embedded into one piece and have included the 3mf files for those parts.

I used a brim for the pegs, but you may not need to if your bed adhesion is good.

I used PLA for all parts. PETG should also work fine.

The "zigzag" piece has its hole printed on its side. If you print it this way, you will likely need to use an 8mm drill to shave/ream the hole round. It will work without the drill, but you'll notice it rubs because the hole is not completely round. You could print the part so the hole is on the bottom face, but you'll need to use support.

Note this is strictly for personal use and Mr Hashimoto holds all copyright IP.