A Japanese sword with a white ray-skin grip decorated with shakuda steela and a menuki in the form of a crane. The pommel and ferrule are decorated with a band of shakudō (an alloy of copper and small amounts of gold, patinated to a purple-black colour) with applied gilt-metal heraldic crests (mon). The curved back-edged steel blade with fuller. Kogai (bodkin) and kozuka of shakudō . Wooden scabbard. The blade signed and dated by Yasumitsu of Osafune Bizen province, 1413.