Shakudo

Shakudo is a traditional Japanese metal alloy primarily composed of copper and gold, with a distinctive dark, almost black appearance. The name derives from the Japanese words *shaku* (black) and *do* (gold), reflecting its unique visual characteristics. Historically, shakudo was developed during the Edo period (1603–1868) as a means to create luxurious and durable decorative objects, particularly in the arts of *kintsugi* (golden repair) and *shakudo-tsuke* (gold-inlaid work).

The alloy typically contains around 80% copper and 20% gold, though variations exist depending on the desired color and properties. When polished, shakudo exhibits a deep, velvety black hue, which contrasts strikingly with gold and other metals. This effect is achieved through a combination of the copper content and the way the alloy is worked and finished. Unlike pure gold, shakudo is highly resistant to tarnishing and corrosion, making it ideal for intricate craftsmanship.

Shakudo was widely used in Japanese sword fittings, such as *koshirae* (sword mountings), where its dark color provided a dramatic contrast to the polished steel of the blade. It was also employed in jewelry, inlaid work, and decorative arts, often paired with gold or silver to enhance visual appeal. The alloy’s durability and aesthetic qualities made it a favored material among artisans, particularly in the late Edo and Meiji periods.

Today, shakudo remains a revered material in traditional Japanese craftsmanship, though its production has declined due to the high cost of gold and the rise of modern alternatives. It continues to be used in specialized applications, including contemporary *kintsugi* and high-end decorative arts, where its unique beauty and historical significance are highly valued.