Conformers

Fūma Shuriken (風魔手裏剣) are weapons that can be used by Axel in Kingdom Hearts 358/2 Days.

In the Final Fantasy video game series, the Fuma Shuriken is a recurring throwing weapon that can only be used by  Ninjas. It is usually the strongest throwing weapon in the game it appears in. The Fima Shuriken appears in  Final Fantasy IV,  Final Fantasy V,  Final Fantasy VI,  Final Fantasy XI, and  Final Fantasy Tactics.

In Japanese fiction, the Fūma Shuriken is a recurring enormous shuriken weapon that typically has four blades.