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    vs.      
Hisaya Tanaka leads the series against Tsuyoshi Iwai, 2-0.

event round table player one result player two
Grand Prix Okayama 200464Tanaka, Hisaya (1763)Won 2-0Iwai, Tsuyoshi (1720)
Grand Prix Niigata 2005146Tanaka, Hisaya (1837)Won 2-0Iwai, Tsuyoshi (1750)