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    vs.      
Tomoharu Saito leads the series against Kenji Oiso, 3-0.

event round table player one result player two
Grand Prix Shizuoka 20131135Saito, Tomoharu (1798)Won 2-1Oiso, Kenji (1589)
Grand Prix Shizuoka 2018 (legacy)1513Saito, Tomoharu (1958)Won 2-1Oiso, Kenji (1819)
Grand Prix Chiba 2019913Saito, Tomoharu (1937)Won 2-0Oiso, Kenji (1905)