K-1 PREMIUM 2004 Dynamite!!

K-1 PREMIUM 2004 Dynamite!! was an annual kickboxing and mixed martial arts event 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, and was broadcast across Japan on the TBS Network.

In the main event, Royce Gracie defeated Sumo legend Akebono in a K-1 MMA Rules match.