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    vs.      
Sadaharu Yamasaki leads the series against Yuuki Iwahashi, 2-0.

event round table player one result player two
Grand Prix Hiroshima 20011179Yamasaki, Sadaharu (1500)Won 2-0Iwahashi, Yuuki (1500)
Grand Prix Kitakyushu 2005774Yamasaki, Sadaharu (1397)Won 2-1Iwahashi, Yuuki (1482)