RIZIN 42 was a combat sports event that took place on Saturday, May 6, 2023 at the Tokyo Ariake Arena in Tokyo, Japan.

RIZIN 23 serves to crown a new bantamweight champion when Hiromasa Ougikubo meets Kai Asakura in the headliner. The undercard is full of prospects, including Kazumasa Majima, Makoto Takahashi and Tatsuki Saomoto. Kickboxing fans will be treated to a rematch between Taiga and Kento Haraguchi, plus the return of KAITO.