, 4-3.
| event |
round |
table |
player one |
result |
player two |
| Grand Prix Yokohama 2003 | 8 | 100 | Oiso, Masashi (1902) | Won 2-0 | Mihara, Makihito (1750) |
| Grand Prix Okayama 2004 | 12 | 29 | Oiso, Masashi (1918) | Lost 0-2 | Mihara, Makihito (1738) |
| Grand Prix Hiroshima 2006 | 9 | 9 | Oiso, Masashi (1858) | Won 2-0 | Mihara, Makihito (1993) |
| 2006 World Championship | 14 | 5 | Oiso, Masashi (1903) | Lost 0-2 | Mihara, Makihito (2028) |
| 2010 World Championship | 12 | 62 | Oiso, Masashi (1937) | Won 2-1 | Mihara, Makihito (1882) |
| Pro Tour Return to Ravnica | 14 | 29 | Oiso, Masashi (2014) | Won 2-1 | Mihara, Makihito (1910) |
| Pro Tour Magic Origins | 13 | 39 | Oiso, Masashi (2071) | Lost 0-2 | Mihara, Makihito (2026) |