Masaaki Satake (佐竹 雅昭, Satake Masaaki, born August 17, 1965) is a Japanese former super heavyweight karateka, kickboxer and mixed martial artist. He was one of the pioneering heavyweight fighters in K-1, after being a member of Kazuyoshi Ishii's Seido-Kaikan school and organization.
He represented the Seido-Kaikan organization in numerous Karate tournaments, winning most of them. After Kazuyoshi Ishii formed K-1, he became an active competitor there, with numerous victories.
He also participated in numerous shootfighting bouts in the RINGS Fighting Network, as well as sanctioned MMA bouts in PRIDE and in Antonio Inoki's Inoki Bom-Ba-Ye events.