ninja tool; ninja implement
Refers to tools and weapons used by ninja, such as shuriken, kunai, and climbing claws. Common in historical and pop-culture contexts.
Ninja tools include shuriken and caltrops.
I saw real ninja implements at the museum.
Compound of 忍 (nin, 'stealth') and 具 (gu, 'tool'). The exact historical origin is uncertain, but the term is associated with the tools of ninja.