Kyoto has an exceptionally long history of metal crafts. Metalworking was already underway in Kyoto during the early Yayoi period, but the craft developed significantly in the Nara and Heian periods. In the Nara era, the expansion of Buddhism led to a proliferation in the construction of Buddhist temples and statuary throughout Japan, and during the Heian period, many metalworkers moved from Nara to Kyoto. By the Momoyama period, Kyoto had dozens of foundries producing items ranging from weapons, armor, swords, and other items for the Imperial Court to pots, kettles, and other household items. Kyoto Kinzoku Kougeihin artisans typically use brass, copper, and tin, and the products they create often feature unique finishes and surface treatments. Kyoto Kinzoku Kougeihin is known for exceptional craftsmanship, design, and detail.