event | round | table | player one | result | player two |
Grand Prix Singapore 2007 | 13 | 3 | Ootsuka, Koutarou (1910) | Won 2-1 | Saito, Tomoharu (2057) |
Grand Prix Shizuoka 2008 | 15 | 39 | Ootsuka, Koutarou (1968) | Won 2-0 | Saito, Tomoharu (1912) |
Pro Tour San Diego 2010 | 13 | 44 | Ootsuka, Koutarou (1933) | Lost 0-2 | Saito, Tomoharu (2066) |