| K-1 PREMIUM 2005 Dynamite!! | |
| Promotion: | K-1, Hero's |
| Date: | December 31, 2005 |
| Venue: | Osaka Dome |
| City: |  Osaka, Japan |
| Attendance: | 53,025 |
| Previousevent: | K-1 PREMIUM 2004 Dynamite!! |
| Followingevent: | K-1 PREMIUM 2006 Dynamite!! |
K-1 PREMIUM 2005 Dynamite!! was an annual kickboxing and mixed martial arts event held by K-1 and Hero's on New Year's Eve, Sunday, December 31, 2005 at the Osaka Dome in Osaka, Japan. It featured 7 HERO'S MMA rules fights, and 4 K-1 rules fights.[1]
The event attracted a sellout crowd of 53,025 to the Osaka Dome, and was broadcast across Japan on the TBS Network.[2]
In the main event, Norifumi "KID" Yamamoto defeated Genki Sudo in the finals of the Hero's Middleweight Tournament to become the first HERO'S Middleweight Champion.[3]
The semi final match was a modified rules bout between Royce Gracie and Hideo Tokoro, which was declared a draw.[4]