RIZIN 40December 31, 2022PromotionRIZIN Fighting FederationVenueSaitama Super ArenaLocationSaitama, JapanNumber of bouts10
Main CardPrediction ModeMain CardBout3 roundsSIWSeika Izawa8-0-0Bout3 roundsVSSplit DecisionSW"Korean Queen Bee"Si Woo Park9-4-0Bantamweight Bout3 roundsNIWNaoki Inoue15-3-0Bantamweight Bout3 roundsVSSubmission, Straight Armbar | R2 · 3:53KTKenta Takizawa13-8-0Heavyweight Bout3 roundsJTW"The Juggernaut"Junior Tafa3-0-0Heavyweight Bout3 roundsVSKO/TKO | R1 · 1:38TSTsuyoshi Sudario6-1-0Flyweight Bout3 roundsJDWJohn Dodson22-13-0Flyweight Bout3 roundsVSKO/TKO | R1 · 1:43HTHideo Tokoro35-31-2Lightweight Bout3 roundsRHRen Hiramoto0-0-0Lightweight Bout3 roundsVSEnds in a No ContestGUGenji Umeno0-0-0Bantamweight Bout3 roundsYMWYuki Motoya32-10-0Bantamweight Bout3 roundsVSKO/TKO, Knee | R2 · 2:56RBRogério Bontorin17-4-0Lightweight Bout3 roundsJCWJohnny Case27-9-1Lightweight Bout3 roundsVSKO/TKO | R1 · 0:36NO"Tyson"Nobumitsu Osawa14-6-0Bout3 roundsCSWChihiro Suzuki9-3-0Bout3 roundsVSKO/TKO | R1 · 4:44YNYoshiki Nakahara17-5-0Lightweight Bout3 roundsSPW"Savage"Sho Patrick Usami5-1-0Lightweight Bout3 roundsVSKO/TKO | R1 · 0:45NB"Black Panther"Noah Bey1-2-0Bout3 roundsYSWYushi Sakura2-1-0Bout3 roundsVSUnanimous DecisionTNTatsuya Nakazawa1-0-0