A Wakizashi, oringinated in Japan. It's usually around 28 inches in lengh with a 'wave' type blade. It is considered the sharpest of all blades.
It is featured in a number of the Soul Calibur games as Taki's "legendary" weapon/s.
Also a "legendary" XBox Live player who had the status to use it as his gamer tag.
1: We found his body, it appears he was killed by a Kris Naga.
2: Shit, Kris Naga just owned me up on Halo 2.