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    vs.      
Hiroyuki Yamakawa is tied in the series against Naoya Kawakami, 1-1.

event round table player one result player two
Grand Prix Kyoto 20156334Yamakawa, Hiroyuki (1380)Lost 0-2Kawakami, Naoya (1412)
Grand Prix Nagoya 20165246Yamakawa, Hiroyuki (1419)Won 2-0Kawakami, Naoya (1449)