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    vs.      
Kazuya Hirabayashi trails the series against Junya Iyanaga, 1-3.

event round table player one result player two
Grand Prix Yokohama 2004730Hirabayashi, Kazuya (1976)Lost 1-2Iyanaga, Junya (1561)
Grand Prix Kitakyushu 2007917Hirabayashi, Kazuya (1809)Won 2-0Iyanaga, Junya (1933)
Grand Prix Kitakyushu 2007QHirabayashi, Kazuya (1890)Lost 0-2Iyanaga, Junya (1944)
Grand Prix Yokohama 2010716Hirabayashi, Kazuya (1889)Lost 0-2Iyanaga, Junya (1880)