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.
| Actor | Role |
|---|---|
 Kai AsakuraNot listed | Not listed |
| HHiromasa OugikuboNot listed | Not listed |
| YYuki MotoyaNot listed | Not listed |
| MMamoru UoiNot listed | Not listed |
| YYutaka SaitoNot listed | Not listed |
| KKazumasa MajimaNot listed | Not listed |
| KKento HaraguchiNot listed | Not listed |
| TTaiga KawabeNot listed | Not listed |
| JJin AoiNot listed | Not listed |
| KKotetsu BokuNot listed | Not listed |
| MMakoto TakahashiNot listed | Not listed |
| SSeiichiro ItoNot listed | Not listed |
 Kaito OnoNot listed | Not listed |
| DDaryl LokokuNot listed | Not listed |
| TTatsuki SaomotoNot listed | Not listed |
| YYusaku NakamuraNot listed | Not listed |
| SShintaro MatsukuraNot listed | Not listed |
| KKoji MoriNot listed | Not listed |