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    vs.      
Itaru Ishida leads the series against Koutarou Ootsuka, 2-0.

event round table player one result player two
Grand Prix Niigata 2005425Ishida, Itaru (1981)Won 2-0Ootsuka, Koutarou (1725)
Grand Prix Bangkok 2007524Ishida, Itaru (1950)Won 2-0Ootsuka, Koutarou (2013)