Hideo Tokoro (born August 22, 1977) is a Japanese mixed martial artist who last competed in the Bantamweight division. A professional competitor since 2000, Tokoro has also formerly competed for Vale Tudo Japan, ZST, Shooto, Rings and K-1 Hero's. He is notable for holding the record for most weight divisions competed in by a professional MMA fighter, at seven, ranging from flyweight through to heavyweight.
Source: “Hideo Tokoro”, English Wikipedia (CC BY-SA 4.0), excerpt