kumiko 組子
組 assembly · 子 small pieces
Kumiko is a woodworking technique in which finely cut wood pieces are assembled without nails into intricate geometric patterns. It is used in shoji, fusuma, and ranma (transom) joinery, with auspicious patterns such as asanoha (hemp leaf), sakura, and kikko (tortoiseshell) created entirely by precise handwork.
Artisans cut thin wooden pieces and join them through precise fitting to form patterns. The pieces interlock without fasteners, relying on exact measurements and cuts. Kumiko work appears in trays, coasters, and decorative items, where the lattice patterns create visual detail.