Kama

A "Kama" is a Japanese sickle used as a weapon. It has a short handle and a sharp beak that inflicts damage. Both Fū and Ao have been seen throwing a Kama at an opponent. Hidan carries a gigantic Triple-Bladed Scythe. There is also a variation of the Kama: a Kusarigama, which has a chain attached to it for increasing its attack range.

An unnamed Konoha shinobi used an unusual one against Pain's Deva Path, though it was deflected by Shinra Tensei. This one was fully compactable so that it could easily be carried ones back, and the blade could be thrown at an enemy while still attached to a chain. chapter 423, pages 02

Trivia

 * Traditional use: Kama was used in Asia to cut crops, mostly rice. However it found its way into martial art where it was usually used in pairs. Since the beak usually was razor-sharp, it was a lethal weapon. It has been suggested that a skilled user could block, trap and disarm enemy weapons.