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    vs.      
Hayato Ishii is tied in the series against Satoshi Matsuyama, 1-1.

event round table player one result player two
Grand Prix Niigata 2005564Ishii, Hayato (1654)Won 2-0Matsuyama, Satoshi (1506)
Grand Prix Kitakyushu 2009849Ishii, Hayato (1822)Lost 0-2Matsuyama, Satoshi (1550)