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    vs.      
Hiroki Yamada is tied in the series against Shinichi Kumagai, 1-1.

event round table player one result player two
Grand Prix Utsunomiya 20026148Yamada, Hiroki (1496)Won 2-1Kumagai, Shinichi (1765)
Grand Prix Kyoto 2003850Yamada, Hiroki (1543)Lost 0-2Kumagai, Shinichi (1669)