| event | round | table | player one | result | player two |
| Grand Prix Nagoya 2004 | 15 | 15 | Mihara, Makihito (1843) | Lost 0-2 | Asahara, Akira (1942) |
| Grand Prix Kitakyushu 2005 | Q | Mihara, Makihito (1991) | Won 2-1 | Asahara, Akira (2081) | |
| Grand Prix Shizuoka 2008 | 6 | 95 | Mihara, Makihito (2066) | Lost 1-2 | Asahara, Akira (1947) |
| Grand Prix Niigata 2009 | 12 | 1 | Mihara, Makihito (1925) | Won 2-0 | Asahara, Akira (1994) |
| Grand Prix Niigata 2009 | 13 | 29 | Mihara, Makihito (1944) | Won 2-1 | Asahara, Akira (1975) |