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    vs.      
Tadashi Yokoyama is tied in the series against Jinpei Hassaku, 1-1.

event round table player one result player two
Grand Prix Shizuoka 2001610Yokoyama, Tadashi (1737)Won 2-0Hassaku, Jinpei (1698)
Grand Prix Fukuoka 2002106Yokoyama, Tadashi (1806)Lost 0-2Hassaku, Jinpei (1744)