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    vs.      
Kenji Hamamoto is tied in the series against Itaru Ishida, 1-1.

event round table player one result player two
Grand Prix Yokohama 20031441Hamamoto, Kenji (1548)Won 2-0Ishida, Itaru (1937)
Grand Prix Niigata 2005107Hamamoto, Kenji (1694)Lost 1-2Ishida, Itaru (2007)