This image provides an overview of ninjas and ninjutsu, a martial art they practiced. Key information includes: Ninjutsu & Ninjas: Ninjutsu is the martial art trained by ninjas, who were mercenaries involved in espionage, battles, and assassinations during feudal Japan. Shinobi Shozoku: The black ninja suit is a modern representation; historically, ninjas used disguises like monks or puppeteers, and kunoichi (female ninjas) used disguises like artists to infiltrate areas. Notable Ninja & Weapons