Cage Force (former name Demolition Octagon Gear (D.O.G.)) is a defunct Japanese Mixed Martial Arts (MMA) organization operated by Greatest Common Multiple (GCM) Communication. It was the first Japanese MMA organization to feature an octagon cage instead of a ring. Yushin Okami, Eiji Mitsuoka, Kuniyoshi Hironaka and Keita Nakamura experienced a cage match in D.O.G before contract with UFC.^[1] It enforced the Unified Rules of Mixed Martial Arts when the changed name to "Cage Force" from "D.O.G.", to prepare Japanese MMA fighters for the UFC.^[2] Cage Force tournament winner was entitled to a contract with UFC. Yoshiyuki Yoshida and Takeya Mizugaki have been contracted to the UFC and WEC by winning the tournament.

History

D.O.G.

On March 12, 2005, the first event of D.O.G. held at Differ Ariake in Tokyo, Japan.^[3] Yushin Okami defeated Brian "Tattoo" Foster by Submission at Main event.

On June 11, 2005, Second event "D.O.G. 2" held.^[4] Yushin Okami defeated Nick Thompson by Thompson's Elbow Injury at 29 seconds of the 1st round. Hidetaka Monma defeated Dave Strasser by KO of the 1st round.

Cage Force

On September 28, 2006, GCM Communication announced the inauguration of "World Wide Cage Network (WWCN)" meaning cooperation with five MMA organizations in the world. GCM Communication changed name to "Cage Force (Named by Caol Uno)" from the "D.O.G.".^[2] and Cage Force held On November 25, 2006.

On 2007,Cage Forece held the lightweight and Welterweight tournament. Artur Oumakhanov defeated Kotetsu Boku via Split Decision and Won Cage Force lightweight Championship. Yoshiyuki Yoshida defeated Dan Hardy via DQ and Won Cage Force Welterweight Championship. Yoshida contracted with the UFC, but Oumakhanov could not contract with the UFC because he lost to Andre Amade at Hero's During the tournament.^[5]

On 2008,Cage Forece held the Featherweight and Bantamweight tournament. Yuji Hoshino defeated Akiyo Nishiura via Unanimous Decision and Won Cage Force Featherweight Championship. Takeya Mizugaki defeated Masahiro Oishi by TKO and Won Cage Force Bantamweight Championship.^[6] Mizugaki contracted with the WEC and fought Miguel Torres for the WEC Bantamweight Championship of WEC 40 on April 5, 2009.

Valkyrie

On September 27, 2008, Valkyrie was established and the first event was promoted In the first part of "Cage Force EX" on November 8, 2008.^[7]

Stopping the GCM

On November 11, 2011, Wajyutsu Keisyukai announced the inauguration of new players association. and They Separated from the GCM Communication because virtually cessation of activity by GCM.^[8] Cage Force was Virtually completed in the last event "Cage Force 20" on November 28, 2010.^[9]

Events

Cage Force

D.O.G.

Current Cage Force champions

Men's division	Upper weight limit	Last champions
Middleweight	85 kg (187.4 lb; 13.4 st)	N/A
Welterweight	77 kg (169.8 lb; 12.1 st)	Yoshiyuki Yoshida
Lightweight	70 kg (154.3 lb; 11.0 st)	Kuniyoshi Hironaka
Featherweight	66 kg (145.5 lb; 10.4 st)	Yuji Hoshino
Bantamweight	62 kg (136.7 lb; 9.8 st)	Takeya Mizugaki

Title history

Welterweight Championship

Weight limit: 77 kg (169.8 lb; 12.1 st)

No.	Name	Event	Date	Defenses
1	Yoshiyuki Yoshida def. Dan Hardy	Cage Force 5: Ariake, Tokyo, Japan	December 1, 2007
Yoshida vacated the title when he left Cage Force for the UFC.

Lightweight Championship

Weight limit: 70 kg (154.3 lb; 11.0 st)

No.	Name	Event	Date	Defenses
1	Artur Oumakhanov def. Kotetsu Boku	Cage Force 5: Ariake, Tokyo, Japan	December 1, 2007
Oumakhanov vactated the title when he left Cage Force for the Dream.
2	Mizuto Hirota def. Tomonari Kanomata	Cage Force 6: Ariake, Tokyo, Japan	April 5, 2008	1. draw. Katsuya Inoue at Cage Force EX Eastern Bound on February 28, 2009
Hirota vactated the title when he left Cage Force for the Sengoku.
3	Kuniyoshi Hironaka def. Yoshihiro Koyama	Cage Force 12: Ariake, Tokyo, Japan	September 12, 2009

Featherweight Championship

Weight limit: 66 kg (145.5 lb; 10.4 st)

No.	Name	Event	Date	Defenses
1	Yuji Hoshino def. Akiyo Nishiura	Cage Force 9 Ariake, Tokyo, Japan	December 6, 2008

Bantamweight Championship

Weight limit: 62 kg (136.7 lb; 9.8 st)

No.	Name	Event	Date	Defenses
1	Takeya Mizugaki def. Masahiro Oishi	Cage Force 9 Ariake, Tokyo, Japan	December 6, 2008
Mizugaki vacated the title when he left Cage Force for the WEC.

Tournaments

Event	Date	Weight class	Winner	Runner-up
Cage Force 5	December 1, 2007	Welterweight	Yoshiyuki Yoshida	Dan Hardy
Cage Force 5	December 1, 2007	Lightweight	Artur Oumakhanov	Kotetsu Boku
Cage Force 9	December 6, 2008	Featherweight	Yuji Hoshino	Akiyo Nishiura
Cage Force 9	December 6, 2008	Bantamweight	Takeya Mizugaki	Matake Oishi

Welterweight Tournament Bracket

Quarterfinals

Semifinals

Final

Yoshiyuki Yoshida

TKO

Matt Cain

1

Yoshiyuki Yoshida

TKO

Akira Kikuchi

1

Akira Kikuchi

TKO

Jared Rollins

2

Yoshiyuki Yoshida

DQ

Dan Hardy

2

Hidetaka Monma

TKO

Janne Tulirinta

1

Hidetaka Monma

TKO

Dan Hardy

3

Daizo Ishige

DEC

Dan Hardy

3

Lightweight Tournament Bracket

Opening round

Quarterfinal

Semifinal

Final

Kotetsu Boku

SUB

Jarkko Latomaki

3

Kotetsu Boku

DEC

David Gardner

3

David Gardner

BYE

Kotetsu Boku

DEC

Eiji Mitsuoka

3

Takumi Nakayama

DEC

Yoichi Fukumoto

3

Takumi Nakayama

TKO

Eiji Mitsuoka

1

Eiji Mitsuoka

SUB

Brian Cobb

3

Kotetsu Boku

DEC

Artur Oumakhanov

3

Tomonari Kanomata

TKO

Jacob Sidic

1

Tomonari Kanomata

DEC

Wataru Takahashi

3

Wataru Takahashi

TKO

In Seok Kim

2

Tomonari Kanomata

TKO

Artur Oumakhanov

2

Watatu Miki

TKO

Yasunori Kanehara

2

Watatu Miki

DEC

Artur Oumakhanov

3

Kaynan Kaku

TKO

Artur Oumakhanov

2

Featherweight Tournament Bracket

Quarterfinals

Semifinals

Final

Fanjin Son

TKO

Tomohiko Hori

1

Akiyo Nishiura

DEC

Fanjin Son

3

Akiyo Nishiura

KO

Jong Man Kim

1

Akiyo Nishiura

DEC

Yuji Hoshino

3

Yuji Hoshino

DEC

Antonio Carvalho

3

Yuji Hoshino

SUB

Takeshi Yamazaki

3

Takeshi Yamazaki

SUB

Daiki Ozaki

2

Bantamweight Tournament Bracket

Quarterfinals

Semifinals

Final

Takeya Mizugaki

KO

Daichi Fujiwara

1

Takeya Mizugaki

BYE[1]

Taiyo Nakahara

TKO

Ryota Uozumi

2

Takeya Mizugaki

TKO

Masahiro Oishi

2

Tetsu Suzuki

TKO

Katsuya Toida

1

Tetsu Suzuki

DEC

Masahiro Oishi

3

Masahiro Oishi

TKO

Paul McVeigh

2

^ 1: Taiyo Nakahara was set to face Takeya Mizugaki in the semifinal round of the Bantamweight tournament. However, Nakahara had to withdraw due to an injury and Mizugaki was given a bye into the Final round.