DREAM.8 took place on April 5, 2009, at Nippon Gaishi Hall in Nagoya, Japan, promoted by Fighting and Entertainment Group’s DREAM. The main event features Hayato "Mach" Sakurai facing Shinya Aoki in a welterweight Grand Prix opening round bout, with Sakurai coming off a TKO win over Kuniyoshi Hironaka at DREAM.6 and Aoki fresh from a submission victory over David Gardner at DREAM.7. Other welterweight Grand Prix matchups include Marius Žaromskis vs. Seichi Ikemoto, Jason High vs. Yuya Shirai, and Andre Galvão vs. John Alessio. Additional bouts showcase Sergei Kharitonov vs. Jeff Monson in a heavyweight clash and Riki Fukuda vs. Murilo Rua.
| Actor | Role |
|---|---|
 Hayato SakuraiSelf | Self |
 Shinya AokiSelf | Self |
 Jason HighSelf | Self |
| YYuya ShiraiSelf | Self |
| SSeichi IkemotoSelf | Self |
| MMarius ZaromskisSelf | Self |
 André GalvãoSelf | Self |
 John AlessioSelf | Self |
| HHideo TokoroSelf | Self |
| DDaiki HataSelf | Self |
 Jeff MonsonSelf | Self |
 Sergei KharitonovSelf | Self |
 Riki FukudaSelf | Self |
 Murilo RuaSelf | Self |
 Vitor RibeiroSelf | Self |
| KKatsuhiko NagataSelf | Self |
| AAndrews NakaharaSelf | Self |
| SShungo OyamaSelf | Self |
 Katsuyori ShibataSelf | Self |
 Ikuhisa MinowaSelf | Self |