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    vs.      
Riku Kumagai trails the series against Hiroki Yamagata, 0-2.

event round table player one result player two
Regional Championships Yokohama 2023161Kumagai, Riku (1994)Lost 0-2Yamagata, Hiroki (1501)
Regional Championships Aichi 20231119Kumagai, Riku (1905)Lost 0-2Yamagata, Hiroki (1503)