RIZIN 38 live from the Saitama Super Arena in Saitama, Japan. The event includes the continuation of their Super Atomweight Grand Prix and Hiromasa Ougikubo’s first appearance since winning a bantamweight tournament last year. In what is the biggest return of the night, RIZIN Bantamweight Champion Kyoji Horiguchi fights in Japan for the first time since late 2020, facing Kintaro in the main event.

RIZIN 40 was a mixed martial arts event that took place on Saturday, December 31, 2022 at the Saitama Super Arena in Saitama, Japan.

RIZIN.33 was a major New Year's Eve MMA event on December 31, 2021, at Saitama Super Arena, headlined by the RIZIN Bantamweight Grand Prix Final and featured major stars like Tenshin Nasukawa's final RIZIN fight against Gomi, plus title bouts and popular matchups, wrapping up RIZIN's 2021 season.