Since the Edo periods of Japan, gladiator arenas exist in certain areas. In these arenas, wealthy business owners and merchants hire gladiators to fight in unarmed combat where winner takes all. Tokita Ohma, nicknamed "Ashura", joins these arenas and devastates his opponents. His spectacular ability to crush his enemies catches the attention of the big business owners, including the Nogi Group CEO, Nogi Hideki.
The anime adaptation for Kengan Ashura is planned to air in 2019 and will be produced by LARX Entertainment (a subsidiary of Studio Hibari).