Kunai (クナイ, Kunai), along with the famed Shuriken, is one of the most common ninja tool in the shinobi world.
The kunai is a black blade with the handle wrapped in bandages and a small ring hole attached to the end of it. The kunai is main designed is for thrusting and stabbing opponents, though it can still do some damage if thrown despite not being designed for it, and is about the length of a person's hand.
Shinobi can basically use the kunai in certain attack position by thrusting the kunai at close range aiming for vital organs or points like Itachi Uchiha who can kill people with the kunai without throwing it. People like police and guards they can use the kunai, like a normal knife and not in a advance way without proper teaching.
A Kunai can also be kept on a spring-loaded wire up the user's sleeve, as seen in a brief Naruto's fight with Sai when they had first met.
The Kunai can be empowered with the five basic nature chakra flow,and when kunai thrown into targets can cut through solid wood and even solid stone targets as Asuma Sarutobi showed with his short teaching with Naruto and before his unfortunate death.
- Shinobi from all across the nations have favoured them so much due to both their sturdy and dependable nature as well as their evident versatility and deep development.