The IGF Championship is the top singles championship in Inoki Genome Federation.
In February 2011, IGF started a tournament to determine the first ever IGF Champion, which eventually led to a final match between Jérôme Le Banner and Josh Barnett. However, just days prior to the final match taking place, IGF announced on August 19 that Barnett would not be able to attend the event. On August 22, IGF declared Le Banner the first champion. The title was founded as a puroresu championship, but has since December 31, 2013, been contested in legitimate mixed martial arts fights.
|1||Jérôme Le Banner||1||August 22, 2011||327 Days||Tokyo||5||Declared first champion, after Josh Barnett pulls out of a tournament final match.|
|2||Kazuyuki Fujita||1||July 14, 2012||535 Days||Osaka||4|
|3||Satoshi Ishii||1||December 31, 2013||235 Days||Tokyo||0|
|4||Mirko Cro Cop||1||August 23, 2014||153 Days||Tokyo||1|
|—||Vacated||—||January 20, 2015||—||—||Cro Cop was stripped of the title when he signed with the UFC.|
|5||Oli Thompson||1||December 31, 2015||567+||Tokyo||0||Defeated Fernando Rodrigues Jr. to win the IGF World GP 2015 and the vacant title.|