Intonjutsu is the art of concealment and escape, it's the Japanese ninja equivalent of the special forces Escape and Evasion for example. The ninja however based their techniques on five elements; water, fire, earth, wood/plants, and metal. Each element had was a category of actions that would help a ninja hide or escape like hiding in tall grass (wood/plants) or throwing coins in a crowded area while being chased to cause chaos (metal).