Ninjutsu

Literally, art of endurance, from nin (endurance) and jutsu (martial art). Ninjutsu is a collection of techniques originally practiced for espionage purposes. It includes methods of gathering information, non-detection, avoidance, and misdirection techniques. Ninjutsu can also involve training in disguise, escape, concealment, archery, medicine, and explosives.

Although the popular view is that ninjutsu is the art of secrecy or stealth, actual practitioners consider it to mean the art of enduring - enduring all of life's hardships. The character nin (&#24525;) carries both these meanings.