Shungo Oyama Martial artist
Shungo Oyama (大山 峻護 Ōyama Shungo [oːjama ɕɯŋɡo]; born April 11, 1974) is a Japanese mixed martial artist with an extensive and successful background in Judo and Sambo. Oyama holds notable victories over Renzo Gracie, Denis Kang, Rodrigo Gracie, and Valentijn Overeem. He is one of four fighters to defeat at least two members of the Gracie family.