Fūma Shuriken

The fūma shuriken is a large, four-bladed shuriken possessing pre-eminent sharpness and lethality. This type of shuriken is considered characteristic to the famous Fūma clan, after whom they were named and who possibly developed them. However, their use is not limited to this clan. Its four blades can be collapsed for easy storage, leading to its nickname. In Sasuke's battle with Itachi, he has shown the ability to rig the four blades to disconnect via pulling a connected wire and have them fire in cardinal directions as a surprise attack, as well as imbuing it with a Chidori to increase its sharpness.