Hero's was a Japanese mixed martial arts promotion operated by Fighting and Entertainment Group, the parent entity behind kickboxing organization K-1. Grown from and branched off of K-1's earlier experiments in MMA, including the K-1 Romanex event and various MMA fights on its regular K-1 kickboxing cards, it held its first show on March 26, 2005. The promotion was handled by former Rings head Akira Maeda. At a press conference on February 13, 2008, FEG announced that they discontinued Hero's and were creating a new mixed martial arts franchise, Dream, in collaboration with former Pride FC executives from Dream Stage Entertainment.

Although not as popular worldwide as the Ultimate Fighting Championship or the now defunct Pride Fighting Championships, Hero's was very recognizable in the Japanese mixed martial arts scene, thanks in large part to the visibility and resources of FEG and K-1. Hero's events were sometimes co-sponsored and broadcast on the TBS national television network in Japan.^[1] In contrast to PRIDE and the UFC, Hero's promoted only three weight classes: middleweight (-70 kg/-154 lbs), light heavyweight (-85 kg/-187 lbs) and heavyweight (+85 kg/+187 lbs)

Many notable mixed martial artists competed in Hero's, including:

* Total event number: 19