Exterior decoration employing unusual materials (foreign animal leather or wood, for example) and precious metals fitted with stones and gems crafted by a master craftsman were artworks rather than articles of utility.
珍しい素材（国内には産しない動物の皮や木など）を使い、優秀な工人が貴金属に玉や宝石をちりばめて作り上げた外装は、実用を離れ美術品の範疇に入るものであった。