Kunai

A Kunai (クナイ), like shuriken, is one of the more basic weapons seen in Naruto. It is a black dagger designed to be thrown that is about the length of one's hand. Many ninja attack by attaching an exploding tag to the blade. The kunai is commonly thrown so that it lodges in an object near the target, and then the explosion from the exploding tag destroys it (the target). Kunai can also be kept on spring-loaded wires in the user's sleeve, as seen with Naruto vs. Sai when they first met.

Different types of kunai have been seen in the series. Minato Namikaze used three-bladed kunai that had a special seal applied to them to perform his Flying Thunder God Technique. During their battle with Hidan, Izumo and Kotetsu use kunai the size of blades to attack him with. Kabuto, when threatening to kill a hospitalized Sasuke in Part I, holds a kunai with a curved blade to Sasuke's neck. Also during the Chunin Exam, Team Oboro used double-bladed kunai while facing Team 7.