My husband studies Bujinkan under Sensei Hatsumi in Japan. He (Sensei) holds the ancient teaching scrolls of the nine schools of ninja, samurai and budo. Ninjas both dressed as farmers to blend in AND in black to camouflage and disguise themselves in woods, shadows, water etc. The term ninja though refers to actions and skills rather than outfit. Great films to watch are Shinobi No Mono which was filmed using Sensei Hatsumi and his grand master Takamatsu as trainers and consultants so the techniques are absolutely accurate and historically correct, and the film is based on true stories. Also Zatoichi film is technically correct, shows a completely different perspective of ninjas, but still historically correct. Zatoichi is like the Robin Hood of Japanese folk law. Both ninja films, both realistic, both different!