The article is quite incomplete when it comes to Masaaki Hatsumi - he started teaching westerners Budo Taijutsu in the seventies. Since then, it spread to all corners of the world. Also, it’s fair to say that ninjas in their original form no longer exist, but the art lives on and continues to affect its practitioners’ lives in many ways; see en.m.wikipedia.org/…/Modern_schools_of_ninjutsu