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    vs.      
Jinpei Hassaku is tied in the series against Takashi Koyanagi, 1-1-1.

event round table player one result player two
Grand Prix Kobe 20111540Hassaku, Jinpei (1689)IDKoyanagi, Takashi (1500)
Grand Prix Kobe 2012917Hassaku, Jinpei (1717)Lost 1-2Koyanagi, Takashi (1594)
Grand Prix Kobe 20121315Hassaku, Jinpei (1715)Won 2-1Koyanagi, Takashi (1606)