Sugata (configuration): shinogi-zukuri (longitudinal ridge line), with a shallow torii-zori (even curve); medium kissaki (point); kitae (forging pattern): faint itame; Hamon (tempering pattern): shallow notare with chōji (slightly wavy with 'clove flowers') but details partially obscured by rubbing; gilded copper habaki (collar); Nagasa (length): 68.0 cm; Nakago (tang): ubu (unshortened), mumei (unsigned), one mekugi-ana (peg-fixing hole). Koshirae (mounting): plain black lacquered saya (scabbard) and kurikata (cord fitting) with semegane (reinforcing bands) and kojiri (chape) of copper alloy and gilt on a nanako (fish-roe pattern) ground; Shakudō (copper alloy) fuchi and kabutogane (hilt collar and pommel) with a black silk itō (braiding) wrapped long tsuka (handle) over samegawa (rayskin) and gilded shakudō menuki (copper alloy hilt grips); the pierced iron tsuba (hand guard) with a russet surface patination and inlaid brass taka-zōgan (raised) decoration of waterwheels and stylised waves