“Tsuiki" is a metalworking technique in which a lump of metal or metal sheet is repeatedly hammered and stretched to form a three-dimensional shape. This craft tradition has a very long history, and works from as early as the 10th century BC have been found. Over time, specialized techniques used in gold, silver, and copper work have been passed down from generation to generation while new metal surface treatment techniques have been incorporated, such as engraving, filigree work, soldering, and plating. Today, tsuiki techniques continue to be used in a wide variety of applications, including metal fittings for shrines and temples, fittings for coffered ceilings, door handles, folding screen metal fittings, and craft items. Many older buildings and portable shrines feature fine examples of tsuiki, including the Golden Hall of Horyuji Temple - a national treasure.