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    vs.      
Tsuyoshi Iwai leads the series against Jinpei Hassaku, 2-0.

event round table player one result player two
Grand Prix Shizuoka 20011126Iwai, Tsuyoshi (1670)Won 2-0Hassaku, Jinpei (1675)
Grand Prix Kyoto 20075272Iwai, Tsuyoshi (1667)Won 2-0Hassaku, Jinpei (1744)