A lone rooster named Keiji wanders around various cities of Japan while defeating mutant demons he encounters.

Written and illustrated by Shū Sakuratani, Rooster Fighter started on Hero's Inc.'s Comiplex manga website on December 18, 2020.

[7][8] In July 2024 at San Diego Comic-Con, it was announced that the manga would receive an anime television series adaptation in collaboration with Hero's Inc.

The anime is licensed by Viz Media and confirmed to be broadcasting in the United States on Adult Swim.

[23] Since its premiere, Rooster Fighter has been popular abroad, especially in Spanish-speaking countries such as Mexico, Spain and Argentina.