Masamune Kadoya (角谷 正宗, Kadoya Masamune) is a recurring character in the Metal Saga, debuting as the deuteragonist in Beyblade: Metal Masters.
He is a proud former member of Team Gan Gan Galaxy during his time in Japan for the Big Bang Bladers World championship. He remains as Gingka's third greatest rival and is the self-proclaimed #1 Blader in the World. He is a talkative, very persistent and impulsive beyblader who fights hard with his Blitz Striker 100RSF, while his previous Beyblade was Ray Striker D125CS during Beyblade: Metal Masters. He is currently a member of Team Dungeon.
He is currently living in America in the Dungeon Gym with his friends, Toby, Zeo Abyss, and presently, King.