Dream 4: Middleweight Grand Prix 2008 2nd Round was a mixed martial arts event held by FEG's mixed martial arts promotion DREAM. The event took place on June 15, 2008 at Yokohama Arena in Yokohama, Japan, featuring the second round of the promotion's Middleweight tournament, with winners advancing to the Dream 6: Middleweight Grand Prix 2008 Final Round at the Saitama Super Arena on September 23, 2008. The DREAM.4 attracted a crowd of 14,037 to the Yokohama Arena and was broadcast live in Japan on SkyPerfect TV Pay-Per-View, and in the United States on HDNet Fights.