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    vs.      
Ryoutarou Kubo is tied in the series against Masayuki Yasuda, 1-1.

event round table player one result player two
Grand Prix Kyoto 20075123Kubo, Ryoutarou (1640)Lost 1-2Yasuda, Masayuki (1535)
Grand Prix Nagoya 2016938Kubo, Ryoutarou (1705)Won 2-1Yasuda, Masayuki (1774)