ninjutsu

/nɪnˈdʒʌtsuː/
noun
  1. A Japanese martial art that involves stealth, espionage, and unconventional fighting techniques, historically practiced by ninjas.
    • The museum had an exhibit on the history of ninjutsu in feudal Japan.
    • He studied ninjutsu for years to master the art of moving silently.
    • Many modern martial arts schools offer classes in ninjutsu techniques.