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    vs.      
Kei Umehara leads the series against Satoshi Yamaguchi, 2-0.

event round table player one result player two
Grand Prix Yokohama 2012SUmehara, Kei (1653)Won 2-1Yamaguchi, Satoshi (1777)
Grand Prix Chiba 201513121Umehara, Kei (1903)Won 2-0Yamaguchi, Satoshi (1941)