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K-1 PREMIUM 2007 Dynamite!! was a 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 headlining with a bout with Kazushi Sakuraba versus Masakatsu Funaki.