is one of the 18 fundamental skills of the

Togakure-ryū is a historical tradition of ''ninjutsu'' known as the "School of the Hidden Door", allegedly founded during the Oho period (1161–1162) by ( ), who learned his original fighting techniques from a Chinese monk named Kain Dōshi. However, the h ...

school of

ninjutsu , sometimes used interchangeably with the modern term , is the martial art strategy and tactics of unconventional warfare, guerrilla warfare and espionage purportedly practised by the ninja. ''Ninjutsu'' was a separate discipline in some trad ...

. Alongside more orthodox and mainstream measures, Bōryaku includes use of unorthodox

strategies Strategy (from Greek στρατηγία ''stratēgia'', "art of troop leader; office of general, command, generalship") is a general plan to achieve one or more long-term or overall goals under conditions of uncertainty. In the sense of the " ar ...

and

tactics Tactic(s) or Tactical may refer to: * Tactic (method), a conceptual action implemented as one or more specific tasks ** Military tactics, the disposition and maneuver of units on a particular sea or battlefield ** Chess tactics ** Political tact ...

, as well as manipulation of politics and exploitation of other current events to assist in subtle influence of the opponent.

Sources

*Dr. Hatsumi, M. (1981) ''Ninjutsu: History and Tradition''. Burbank, CA: Unique Publications. Ninjutsu skills {{martialart-stub