Vacation, at last. On the fast track to Japan just because you felt like it. Well, that lotto ticket may have helped some slight amount. Japan has history, but not one person looks at that! Owning a great part of the world only to lose it at the hands of the atom bomb and the others. Under the rule of Samurai, and in fear of the ninja. History made Japan. But something is missing.
The ninja fought by stealth and cunning, turning farmers into armed men and women in a matter of only years and using farm tools to over power the Samurai. Two errors, one being is that the ninja had the tools on them. Two being that only women were ninja.