Yaiba: Ninja Gaiden Z X360. The ninja are the most elite of warriors exercising unparalleled skill precision and lethality for centuries. Only the most deadly candidates are given the rare and coveted opportunity to join the clan. The final test of a ninja's training is to face a true ninja master in combat. For years Yaiba was that final ninja. But after suffering the indignity of serving a clan led by the weak-willed and spineless he decided he had had enough. It only seemed natural to him that he should claim the spines they had no use for. Among his confederacy of cowards the weakest of all in Yaibas eyes was the "legendary" Ryu Hayabusa. Fifteen dead ninjas later and Yaiba found himself face-to-face with the straight-arrow poster boy. A vicious battle ensued and when the dust cleared Ryu Hayabusa stood victorious - for the moment. But that's only where the story begins.