| event | round | table | player one | result | player two |
| Grand Prix Kyoto 2007 | 5 | 45 | Mihara, Makihito (2154) | Draw 1-1 | Mitamura, Kazuya (1802) |
| Grand Prix Kitakyushu 2007 | 4 | 26 | Mihara, Makihito (2133) | Lost 1-2 | Mitamura, Kazuya (1908) |
| Grand Prix Okayama 2008 | F | Mihara, Makihito (2111) | Won 2-0 | Mitamura, Kazuya (2050) | |
| Grand Prix Singapore 2009 | 4 | 7 | Mihara, Makihito (1906) | Lost 0-2 | Mitamura, Kazuya (1930) |