The Double Kumiki puzzle is a more advanced version of traditional Kumiki designs, where two separate sections must interlock into a unified structure. The challenge increases due to the doubled number of pieces and their complex arrangement. The term Kumiki (meaning "to join wood together") puzzles have their origins in Japanese woodcraft traditions. These interlocking wooden puzzles were originally used by Japanese carpenters to practice their craft and create structures without nails. The puzzle is often enjoyed by both kids and adults for its charm and difficulty. This piece drew inspiration from traditional Japanese joinery techniques. The design likely evolved from simpler Kumiki puzzles, challenging users to handle multiple sets of pieces at once.