Rizin Fighting Federation (Rizin FF) is a Japanese mixed martial arts organization created in 2015 by the former Pride Fighting Championships and Dream Stage Entertainment president Nobuyuki Sakakibara.

Its events are promoted as larger-than-life events with elaborate opening ceremonies and fighter entrances, its matches are fought in a roped ring and it has a ruleset inherited from Pride and Dream. The organization also promotes "Grand Prix", single-elimination tournaments where fighters have to fight multiple opponents in the same night.  Rizin is considered Japan's top MMA promotion.