変わり身の術
A common technique used by [[ninja]] to get out of trouble.  Just before being hit by an attack, the ninja disappears in a cloud of smoke, leaving behind an inanimate object in his place, most often a [[log]] of wood. 

Sometimes the log will be left wearing the ninja's clothing, while the ninja is left nude or nearly so.

While popularized by [[Naruto]], this trope is not specific to that series, nor did it originate there.

h4. External links

* "TVTropes: Ninja Log":[https://tvtropes.org/pmwiki/pmwiki.php/Main/NinjaLog]
substitution technique