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    vs.      
Kouichi Tanaka leads the series against Kentarou Nonaka, 2-0.

event round table player one result player two
Grand Prix Hiroshima 2011145Tanaka, Kouichi (1671)Won 2-1Nonaka, Kentarou (1962)
Grand Prix Nagoya 2012849Tanaka, Kouichi (1839)Won 2-1Nonaka, Kentarou (1787)