Tantō

A tantō is simply a small katana. Several chūnin, medical-nin and shinobi of Konohagakure when going to war wear them strapped to their lower backs. The version Root uses are double-edged and have no tip, meant only for cutting and defence. They carry the tantō vertically on the back specifically behind the shoulder.

Kurohime Kōgōyasha carries hers on her right thigh and is coated in salamander poison, which upon injection is capable of making the entirety of a victim's body numb in just a few moments and may eventually prove fatal, although these effects can be counteracted with the correct antidote.