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    vs.      
Riku Kumagai leads the series against Kensuke Kato, 3-0.

event round table player one result player two
Grand Prix Tokyo 2016143Kumagai, Riku (2102)Won 2-0Kato, Kensuke (1859)
Grand Prix Tokyo 2016QKumagai, Riku (2116)Won 2-1Kato, Kensuke (1867)
Grand Prix Kyoto 2019121Kumagai, Riku (2085)Won 2-1Kato, Kensuke (2034)