The Octagon did it up big for its first trip to the 'Land of the Rising Sun'! Ultimate Japan 1 hosted a 4 man heavyweight tournament, the first ever UFC middleweight championship bout, a UFC heavyweight championship bout, and a superfight.

Maurice Smith looks to defend his heavyweight title versus Tank Abbott, Randy Couture and Vitor Belfort square off in a superfight showdown, and Mark Kerr looks to conquer his second consecutive heavyweight tournament.

Champion kickboxer Maurice Smith takes on Mark Coleman in a superfight as well as two four man tournaments in the heavyweight and middleweight divisions.

Watch the first appearance of future UFC champions and UFC Hall of Famers Randy Couture and Tito Ortiz as well as a superfight between Vitor Belfort and Tank Abbott.

For the first time ever, the UFC divided fighters into weight classes. UFC 12 featured a heavyweight (200lb and over) and lightweight (199lb and under) tournament alond with a superfight between Mark Coleman and Dan Severn.