Hanayama Cast Puzzles are meticulously crafted metal puzzles that stand out not only for their exceptional quality but also for their extraordinary and high-quality design. The name 'Cast Puzzle' comes from the English word 'to cast,' which means to mold metal.

The challenge of this intricate metal puzzle is to separate the pieces and then reassemble them.

This puzzle is based on an original called 'Puzzle Ring.' This style of ring became popular in Europe during the 15th century and was actually used for official engagement and wedding rings. The Christian reformer Martin Luther is said to have worn one.

It is rumored that if the ring falls apart, it serves as evidence of the wearer's infidelity. This is a particularly intriguing story that is embedded in this small puzzle.