The bushi warriors of medieval Japan ruled empires, fought battles, and wrote the history of Japan's early years of civilization. For an avid collector, a complete set of antique Samurai armor is quite a find. The large inventory on eBay includes antique samurai armor in complete sets or as individual pieces. The collecting possibilities include Kote armor pieces designed to protect the wrist to shoulder region, Samurai armor helmets, and Samurai masks. Wearable Samurai armor is also available, although these pieces are generally reproductions and not authentic historical pieces. Different styles of Samurai armor correspond to different historical eras. Complete sets of Yoroi armor from the Kamakura Period feature the signature winged helmet design, demon-like mask, and thickly embroidered armor with traditional scales called kozane. This armor is usually leather and iron, with small strips coated with lacquer, bound together, and then laced with silk or leather. Later armor pieces created after 1500, utilize plate armor, commonly referred to as tosei-gusoku. Ashigaru armor pieces worn by foot soldiers are also very popular with serious collectors.