Strikeforce heavyweight champ Alistair Overeem and Bellator lightweight title-holder Eddie Alvarez were among the winners on Sunday at DREAM 12 in Osaka, Japan.

Overeem submitted James Thompson with a guillotine choke in under a minute in the DREAM 12 main event, while Alvarez used an arm-triangle choke to defeat Katsunori Kikuno in the second-round of their featured matchup.

All eighteen fighters scheduled to compete at tomorrow’s DREAM 12 event in Osaka, Japan hit the scales earlier today to weigh-in for their bouts. Lightweight Won Sik Park was the long fighter on the card who failed to make weight on their first attempt, with notables Alistair Overeem, James Thompson, Eddie Alvarez, Kazushi Sakuraba, and Chase Beebe all hitting their marks.

The Japanese promotional group FEG, which runs the Dream MMA events, has long be suggesting that they had a big surprise in store for their already announced Dream 12 event, which will take place on October 25 in Osaka, Japan. They had already released a short promotional video in which were a few shots of a cage which led some people to believe that would be the surprise. Those people were correct, and Dream has officially confirmed that with a new promotional video for the event (included below).

Check out middleweight Hector Lombard’s championship victory and Stefanie Guimareas’ knee KO of Yvonne Reis after the jump…

The remaining Bellator tournament finalists, lightweights Eddie Alvarez and Toby Imada and welterweights Hector Lombard and Jared Hess, successfully weighed in on Thursday for Bellator XII, which takes place on Friday at the Seminole Hard Rock Hotel and Casino in Hollywood, Florida.

Twelve other fighters scheduled to compete in non-tourmament bouts at the event also made weight.

Upstart MMA promotion Bellator Fighting Championships will conclude its first season with events on June 12 at the Mohegan Sun Arena in Uncasville, Connecticut and June 19 at the Seminole Hard Rock Hotel and Casino in Hollywood, Florida.

Lightweights Eddie Alvarez and Toby Imada advanced to the Bellator lightweight tournament finals on Friday with victories at Bellator 5 in Dayton, Ohio. Continue reading after the jump for complete results, including a "Submission of the Year" candidate, and a recap of the card.

A women's superfight between Gina Carano and Cris Cyborg is likely to take place in Strikeforce in August, Scott Smith suffered a shattered hand in Saturday's loss, DREAM has announced their featherweight grand prix pairings, and more...

Jorge Masvidal, Eddie Alvarez, and Tony Imada advanced to the second round of the Bellator FC lightweight tournament on Friday with victories at the promotion's debut event in Hollywood, Florida.

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Joachim Hansen def. Shinya Aoki via TKO – Round 1, 4:19*
DREAM Lightweight Championship
Alistair Overeem def. Mark Hunt via submission – Round 1, 1:11
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Hideo Tokoro def. Takeshi Yamazaki via unanimous decision
Kuniyoshi Hironaka def. Motoki Miyazawa via TKO (cut) – Round 1, 8:57
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Caol Uno def. Mitsuhiro Ishida via submission – Round 2
Lightweight Grand Prix Bout
Eddie Alvarez def. Joachim Hansen via unanimous decision
Lightweight Grand Prix Bout
Tatsuya Kawajiri def. Luiz Firmino via unanimous decision
Lightweight Grand Prix Bout
Jason Miller def. Katsuyori Shibata via TKO – Round 1
Middleweight Grand Prix Bout
Nick Diaz def. Katsuya Inoue via TKO – Round 1
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