Kazuma Watanabe (渡辺 一馬, Watanabe Kazuma; born 6 May 1990) is a Japanese motorcycle racer, competing in the All Japan Road Race JSB1000 Championship aboard a Kawasaki ZX-10R. He has competed in the GP125 and J-GP2 classes of the All Japan Road Race Championship, as well as in the ST600 class, where he was champion in 2013.
Source: “Kazuma Watanabe (motorcyclist)”, English Wikipedia (CC BY-SA 4.0), excerpt