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    vs.      
Hiroyuki Ishiwada is tied in the series against Kenji Oiso, 1-1.

event round table player one result player two
Grand Prix Yokohama 2012480Ishiwada, Hiroyuki (1506)Won 2-1Oiso, Kenji (1535)
Grand Prix Shizuoka 20131443Ishiwada, Hiroyuki (1565)Lost 0-2Oiso, Kenji (1617)