I'm so happy to know there's still real ninjas out there. Like Grand Master Masaaki Hatsumi, the only living disciple of the late Toshitsugu Takamatsu who fought and won 12 fights to the death, and once snatched an eyeball from a would-be Chinese bandit when working as a bodyguard.


But of course as a Grand Master you should be able to kill your students, lest they get any funny ideas.