K-1 PREMIUM 2007 Dynamite!! was an annual kickboxing and mixed martial arts event held by K-1 and Hero's on New Year's Eve, Monday December 31, 2007 at the Kyocera Dome Osaka in Osaka, Japan. It featured 7 HERO'S MMA rules fights, 4 K-1 rules fights, and 4 fights in the K-1 Under 18 Tournament. The event attracted a sellout crowd of 47,918 to the Kyocera Dome Osaka, and was broadcast live across Japan on the TBS Network. A fight between Sergei Kharitonov and Mighty Mo was scheduled to take place, but Mo was forced to withdraw due to leg injuries incurred during his last fight in K-1.

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