A ninja (忍者) or shinobi (忍び) wis a covert agent or mercenary in feudal Japan. The functions o the ninja includit espionage, sabotage, infiltration, an assassination, an appen combat in certaint situations.[1] Thair covert methods o wagin irregular warfare war deemed dishonourable an aneath the samurai, that observed strict rules aboot honour an combat.[2]

Drawin o the airchetypical ninja, frae a series o sketches (Hokusai manga) bi Hokusai. Widblock print on paper. Volume six, 1817.


  • Ratti, Oscar; Westbrook, Adele (1991), Secrets of the samurai: a survey of the martial arts of feudal Japan, Tuttle Publishing, ISBN 978-0-8048-1684-7
  • Turnbull, Stephen (2003), Ninja AD 1460–1650, Osprey Publishing, ISBN 978-1-84176-525-9