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    vs.      
Naoki Kubouchi is tied in the series against Yasuhisa Sakajo, 1-1.

event round table player one result player two
Grand Prix Yokohama 2003640Kubouchi, Naoki (1625)Lost 0-2Sakajo, Yasuhisa (1537)
Grand Prix Shanghai 2011741Kubouchi, Naoki (1909)Won 2-1Sakajo, Yasuhisa (1747)