Nitoh-Ryu
Nitou Ryu is literally Japanese for two-sword style, with the abstract translation being "double-bladed technique". It is noted for being put to use first by the lengendary japanese swordsman Miyamoto Musashi. As its name implies, it is the art of using two blades simultaneously. Various charaters in video games have utilized the form as well, including Natoe (albeit for a limited amount of time) and Brave Fencer Musashi(based off the real swordsman) who used a Zanbato-like sword along with an katana.