| event | round | table | player one | result | player two |
| Grand Prix Hong Kong 2004 | 13 | 20 | Ikeda, Tsuyoshi (1842) | Lost 0-2 | Osawa, Takuya (1754) |
| Grand Prix Matsuyama 2005 | 4 | 53 | Ikeda, Tsuyoshi (1843) | Lost 1-2 | Osawa, Takuya (1738) |
| Grand Prix Niigata 2005 | 9 | 1 | Ikeda, Tsuyoshi (1853) | Draw 1-1 | Osawa, Takuya (1883) |
| Grand Prix Kitakyushu 2009 | 4 | 29 | Ikeda, Tsuyoshi (2116) | Won 2-1 | Osawa, Takuya (1812) |