- Given Name: 大山峻護, Oyama Shungo
- Pro MMA Record: 14-19-0 (Win-Loss-Draw)
- Nickname: N/A
- Current Streak: 2 Losses
- Age: 45 | Date of Birth: 1974.04.11
- Last Fight: December 06, 2014 in Pancrase
- Weight Class: Heavyweight | Last Weigh-In: 184.3 lbs
- Affiliation: Free
- Height: 5'10" (178cm) | Reach: N/A
- Career Disclosed Earnings: $0 USD
- Born: Nasushiobara-shi, Tochigi, Japan
- Fighting out of: Japan
- College: International Budo University
- Foundation Style: Judo, Sambo
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Shungo Oyama Wiki Update Wiki
Oyama has fought at Heavyweight and Light Heavyweight but is currently a Middleweight. He holds a black belt in Judo. He has fought in KOTC, Pride, ROTR, K-1 Hero's, Dream, Pancrase, and Road FC. Despite his mediocre record he has beaten many name fighters and is one of only four fighters to defeat two Gracie's. His notable wins include Rodrigo Gracie, Carlos Newton, Valentijn Overeem, Renzo Gracie, Brian Gassaway and Denis Kang.
Oyama participated in Hero's 2006 Light Heavyweight Grand Prix. He defeated Rodrigo Gracie in the quarter final round but lost to Melvin Manhoef in the semifinal. He next participated in the 2008 Dream Middleweight Grand Prix, losing in the opening round to Dong Sik Yoon.
Probably the highlight of Oyama's MMA career was the ROAD FC Middleweight Tournament in 2012. He had a little momentum coming in but was still considered a sizable underdog. In the opening round he drew PRIDE and UFC veteran Denis Kang, Oyama would pull off the upset and ride the momentum to 3 straight 1st round victories, the tournament championship, and the ROAD Middleweight title.
In addition to the ROAD title, Oyama is the former Martial Combat Light Heavyweight champion . He has also fought for the Middleweight King of Pancrase but lost to Ryo Kawamura.
After a 1-5 stretch of brutal losses, Oyama announced he would be having his retirement bout and ceremony at Pancrase 263. He again was brutally finished by Yuji Sakuragi.