Many famous people in Japanese history have been associated or identified as ninja, but their status as ninja is difficult to prove and may be the product of later imagination.

In Japanese, ja is the combining form of sha, meaning "person." Ninjas originated in the mountains of ancient Japan as practitioners of ninjutsu, a martial art sometimes called "the art …

Historically, the word "ninja" was not in common use, and a variety of regional colloquialisms evolved to describe what would later be dubbed ninja. By taking a single pellet a ninja's chakra …

Dec 13, 2025 · ninja (plural ninja or ninjas) (martial arts) A person trained in ninjutsu, especially (historical) one used for espionage, assassination, and other tasks requiring stealth during …

Ninja, historically known as a “shinobi” (忍者 or one who is invisible), was a covert agent or mercenary in feudal Japan. The term “ninja” is often used interchangeably with “shinobi,” and …

ninja (noun) ninja / ˈ nɪnʤə/ noun plural ninja also ninjas Britannica Dictionary definition of NINJA [count] : a fighter who is trained in the Japanese martial arts

ninja noun /ˈnɪndʒə/ (pl. ninjas or ninja) (from Japanese) a person trained in traditional Japanese skills of fighting and moving quietly

There are various ways to call ninja, depending on their relation to being secretive, the jobs they performed, and the reading of the Chinese characters with which their names are written.

What is a Ninja? A ninja was a covert agent, mercenary, or guerrilla warfare expert in feudal Japan.

Definition of 'ninja' ninja in American English (ˈnɪndʒə ) noun Word forms: plural ˈninja or ˈninjas Origin: Jpn any of a class of feudal Japanese warriors highly trained in stealth and employed …