Caol Uno
Tokoro had his debut in Hero's in 2005 in the Lightweight Grand Prix Quarterfinal. He went against the well regarded Alexandre Franca Nogueira, and shocked pundits by knocking him out with a spinning backfist at the end of a fast-paced, back and forth match. Tokoro advanced round against Shooto veteran Caol Uno, but he was controlled and damaged for a unanimous decision loss.