Ninja Warriors - From Myth to the Movies

Perhaps the last living master of ninjitsu, Grand Master Masaaki Hatsumi demonstrates a technique during a lesson at the Bujinkan Dojo,
Itsuo Inouye / AP

The Real Deal?
Perhaps the last living master of ninjitsu, Grand Master Masaaki Hatsumi demonstrates a technique during a lesson at the Bujinkan Dojo, a cramped school, in Noda, east of Tokyo, Sunday. Hatsumi claims to have 100,000 followers worldwide.

Get the Latest Photos from Time.com
Get TIME photos and pictures of the week delivered directly to your inbox.