Krush 123 took place on March 27, 2021, at Korakuen Hall in Tokyo, Japan. In the main event, Begin Yoshioka faced Kazuki Miburo. The card also featured Fumiya Osawa versus Shinichiro Kawasaki and Tatsuya Oiwa versus Naoki Yamamoto.
| Actor | Role |
|---|---|
| BBegin YoshiokaSelf | Self |
| KKazuki MiburoSelf | Self |
| FFumiya OsawaSelf | Self |
| SShinichiro KawasakiSelf | Self |
| TTatsuya OiwaSelf | Self |
| NNaoki YamamotoSelf | Self |
| SSatoru NariaiSelf | Self |
| NNarufumi NishimotoSelf | Self |
| SSEIYASelf | Self |
| TTatsukiSelf | Self |
| FFaezeh WeerasakrecSelf | Self |
| RRanSelf | Self |
| KKyohei HayashiSelf | Self |
| YYuta KuniedaSelf | Self |
| SSatoko OzawaSelf | Self |
| NNoriko IkeuchiSelf | Self |
| NNagisa ItoSelf | Self |
| TTerukuSelf | Self |