| event | round | table | player one | result | player two |
| Pro Tour Venice 2003 | 13 | 30 | Oiso, Masashi (1665) | Lost 1-2 | Morita, Masahiko (1833) |
| Grand Prix Boston 2005 | Q | Oiso, Masashi (2051) | Won 2-0 | Morita, Masahiko (2032) | |
| Grand Prix Taipei 2005 | Q | Oiso, Masashi (2213) | Lost 1-2 | Morita, Masahiko (2092) | |
| Grand Prix Kitakyushu 2005 | 13 | 29 | Oiso, Masashi (2203) | ID | Morita, Masahiko (2134) |
| Pro Tour Yokohama 2007 | 6 | 10 | Oiso, Masashi (1839) | Lost 0-2 | Morita, Masahiko (2017) |