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

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