Luis Gustavo captured the RIZIN lightweight championship by knocking out Ilhom Nazimov in the first round at RIZIN 53. The event featured multiple finishes and decisions across various weight classes. Ren Hiramato and Koji Tanaka fought to a draw in a special stand-up rules bout with no weight limit. Other notable results included Ryo Takagi knocking out Kaiven Li in round one, and Ryan Cafaro submitting Koichi Matsushima with a guillotine in the third round. The card featured both MMA and kickboxing bouts, showcasing RIZIN's varied fight formats.
