K-1 PREMIUM 2004 Dynamite!! was held by K-1 on New Year's Eve, Friday, December 31, 2004 at the Osaka Dome in Osaka, Japan. It featured 7 K-1 MMA rules fights, 3 K-1 rules fights, and a special mixed K-1 & MMA Rules fight. The event attracted a sellout crowd of 52,918 to the Osaka Dome. In the main event, Royce Gracie defeated Sumo legend Akebono in a K-1 MMA Rules match.

• Fighting & Entertainment Group
• TBS
• Royce Gracie
• Akebono Tarō
• Jérôme Le Banner
• Bob Sapp
• Kazuyuki Fujita
• Karam Ibrahim
• Masato
• Norifumi Yamamoto