SUPER RIZIN.4 takes place on July 27, 2025, at Saitama Super Arena (Stadium Version) in Saitama, Japan. The main event features Mikuru Asakura taking on Kleber Koike. The card also includes Naoki Inoue facing Ryuya Fukuda for the RIZIN Bantamweight title. Inoue, a 28-year-old submission expert, clashes with 31-year-old DEEP two-division champion Fukuda.
| Actor | Role |
|---|---|
 Mikuru AsakuraSelf | Self |
 Kleber KoikeSelf | Self |
 Patricky FreireSelf | Self |
| SShunta NomuraSelf | Self |
 Ren SugiyamaYA-MAN | YA-MAN |
 Masanori KaneharaSelf | Self |
 Kyoma AkimotoSelf | Self |
| KKoki AkadaSelf | Self |
 Naoki InoueSelf | Self |
| RRyuya FukudaSelf | Self |
| SSeika IzawaSelf | Self |
| YYu Jin ShinSelf | Self |
| TTatsuya AndoSelf | Self |
| JJi Yong YangSelf | Self |
| MMoeri SudaSelf | Self |
| NNoeru NaritaNOEL | NOEL |
| AAlexander SoldatkinSelf | Self |
 Mikio UedaSelf | Self |
| MMarek SamociukSelf | Self |
 Jose AugustoSelf | Self |
| MMakoto TakahashiMakoto Shinryu | Makoto Shinryu |
| EErson YamamotoSelf | Self |
 Alibek GadzhammatovSelf | Self |
| TTakaki SoyaSelf | Self |
| NNkazimulo ZuluSelf | Self |
 Yuki ItoSelf | Self |
| HHiromasa OugikuboSelf | Self |
 Jose TorresSelf | Self |
| YYuki MotoyaSelf | Self |
| HHiroya KondoSelf | Self |