| event | round | table | player one | result | player two |
| Pro Tour New Orleans 2003 | 10 | 4 | Oiso, Masashi (1920) | Lost 0-2 | Okamoto, Jin (1993) |
| Grand Prix Okayama 2004 | 11 | 5 | Oiso, Masashi (1900) | Won 2-0 | Okamoto, Jin (1899) |
| Grand Prix Nagoya 2004 | 6 | 80 | Oiso, Masashi (1951) | Draw 1-1 | Okamoto, Jin (2011) |