DREAM 15 Light Heavyweight Grand Prix 2010 First Round
- Middleweight bout:
Kazuhiro Nakamura vs. 
Karl Amoussou
- Nakamura defeated Amoussou via unanimous decision at 5:00 of round 2
- Featherweight bout: Mitsuhiro Ishida vs. Daiki Hata
- Ishida defeated Hata via unanimous decision at 5:00 of round 2.
- Featherweight bout: Michihiro Omigawa vs.
Jong Young Sam
- Omigawa defeated Jong via submission (guillotine choke) at 8:45 of round 1.
- Light Heavyweight Grand Prix Opening Round bout:
Melvin Manhoef vs. Tatsuya Mizuno
- Mizuno defeated Manhoef via submission (kimura) at 7:23 of round 1.
- Light Heavyweight Grand Prix Opening Round bout:
Gegard Mousasi vs. 
Jake O’Brien
- Mousasi defeated O’Brien via submission (guillotine choke) at 0:31 of round 1.
- Lightweight bout:
Gesias Cavalcante vs. Katsunori Kikuno
- Cavalcante defeated Kikuno via split decision at 5:00 of round 2
- Lightweight Championship bout: Shinya Aoki (c) vs. Tatsuya Kawajiri
- Aoki defeated Kawajiri via submission (ankle lock) at 1:53 of round 1.