event | round | table | player one | result | player two |
Grand Prix Nagoya 2004 | 6 | 91 | Ootsuka, Koutarou (1604) | Lost 0-2 | Imagawa, Hiromasa (1562) |
Grand Prix Shizuoka 2008 | 16 | 25 | Ootsuka, Koutarou (1985) | ID | Imagawa, Hiromasa (1716) |
Grand Prix Kobe 2012 | 14 | 65 | Ootsuka, Koutarou (1919) | Lost 1-2 | Imagawa, Hiromasa (1768) |