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    vs.      
Tatsuumi Kobayashi is tied in the series against Kenji Oiso, 1-1.

event round table player one result player two
Grand Prix Yokohama 20199179Kobayashi, Tatsuumi (2035)Lost 0-2Oiso, Kenji (1815)
Regional Championships Aichi 20231211Kobayashi, Tatsuumi (1792)Won 2-1Oiso, Kenji (1909)