RIZIN Fighting Federation returned to action on Sunday with the massive RIZIN 51 card in Nagoya, Aichi Prefecture, Japan.
Two title fights, the heavyweight world grand prix final, and the second round of the flyweight grand prix made RIZIN 51 must-see TV for fight fans (and if we’re being honest, vastly superior on paper to UFC Perth, which preceded it).
In the main event, lightweight champion Roberto Satoshi Souza looked to defend his title against Yoshinori Horie, a one-and-done UFC alum who had found renewed success in recent years. As for the co-main event, Razhabali Shaydullaev was looking to defend his featherweight title for the first time, opposite Viktor Kolesnik.
Where to Watch RIZIN FF
RIZIN 51 takes place on Sunday, September 28, 2025 at the IG Arena in Nagoya. The card streams live on RIZIN.tv; full results can be found below. For western fight fans, the action gets underway at 10PM ET, 7PM PT on Saturday night.
RIZIN 51 Results
Main Card
Roberto Satoshi Souza vs. Yoshinori Horie – for the RIZIN lightweight championship
Razhabali Shaidullaev vs. Viktor Kolesnik – for the RIZIN featherweight championship
Hiromasa Ougikubo vs. Alibek Gadzhammatov – Flyweight World Grand Prix Second Round
Yuki Motoya vs. Makoto “Shinryu” – Flyweight World Grand Prix Second Round
Yuki Ito vs. Erson Yamamoto – Flyweight World Grand Prix Reserve Bout
Intermission
Marek Samociuk vs. Aleksandr Soldatkin – Heavyweight World Grand Prix Final
Shoko Sato vs. Danny Sabatello
Genji Umeno vs. Ryusei Ashizawa
Ryo Takagi vs. Kisa Miyake
Yusuke Yachi def. Bilal Haga by submission (rear-naked choke), Round 2, 2:09
Hiroaki Suzuki def. Yuele Huang by split decision
Daichi Tomizawa def. Joe Hiramoto by split decision
Thiatou Bambilor def. Kosuke Kindaichi by unanimous decision
Takahiro Okuyama def. Tetsuya Yamato by submission (arm-bar), Round 1
Opening Card
Street Bob Kousuke def. Shogo Ota by unanimous decision – RIZIN MMA Special Rules
Kuushi Ishizaka def. Mahiro Yamaki by unanimous decision – RIZIN MMA Special Rules
Daisuke Kobayashi def. Syuto Sato by unanimous decision – RIZIN MMA Special Rules
Yuhei def. Jin Wakita by unanimous decision – RIZIN MMA Special Rules
