Former UFC flyweight title challenger John Dodson of the United States faced Hideo Tokoro of Japan on December 31 at Saitama Super Arena, Rizin 40.
Dodson defeated Tokoro by knockout in the first round.
Dodson, 38, had his previous fight in April 2022 at XMMA 4 - Black Magic, beating Francisco Rivera by unanimous decision. He has 26 wins and 13 losses under his belt.
Tokoro, 45, lost to Makoto Takahashi by unanimous decision at Rizin 37 last July. He has 35 wins and 32 losses under his belt.