The first IGF show was held on June 29, 2007 at the Sumo Hall in Tokyo, Japan. The card was completely changed at the last minute, resulting in the 8,426 fans in attendance not knowing who or what they were going to see outside of the main event of Kurt Angle vs. Brock Lesnar.
Shinichi Suzukawa was scheduled to face Bob Sapp in an IGF special rules Heavyweight bout on December 31, 2010, at K-1Dynamite!! 2010. The fight was to be held under MMA rules, but the fighters wouldn't be wearing gloves. Closed-fist strikes would have been allowed, but palm strikes wouldn't have been permitted. The event was to air on HDNet in North America. However, the fight was canceled due to a last-minute contract dispute but the Japanese audience in attendance were told by the promoter involved in the contract dispute that Sapp “had lost his will to fight.”  In 2011 the company gave a gift to Kim Jong Il, leader of North Korea. In August 2014, IGF held two shows in Pyongyang, North Korea.
On December 29, 2014, IGF announced a deal with PPTV to bring its programming to Chinese audiences.
On December 31, 2013, Satoshi Ishii became the first IGF Champion, after winning by unanimous decision against Kazuyuki Fujita. After staying for 235 days as champion, he lost the title to Mirko Cro Cop by TKO (doctor stoppage). Later Satoshi Ishi asked for a rematch against his tormentor, which was granted, but without success, losing again by TKO after famous head kick. Cro Cop was stripped of the title in January 23, 2015 due to signing with Ultimate Fighting Championship.
Quarterfinals took place on April 11, 2015 at IGF 3
Semi-finals took place on August 29, 2015 at IGF 4
The Final takes place on December 31, 2015 at Inoki Bom-Ba-Ye 2015 and it will crown a new IGF Heavyweight Champion.