| event | round | table | player one | result | player two |
| 2003 World Championship | 12 | 1 | Okamoto, Jin (1951) | Lost 0-2 | Nieminen, Tuomo (1797) |
| 2003 World Championship | 17 | 80 | Okamoto, Jin (2004) | ID | Nieminen, Tuomo (1833) |
| 2003 World Championship | S | Okamoto, Jin (2002) | Won 3-1 | Nieminen, Tuomo (1871) | |
| 2005 World Championship | 17 | 27 | Okamoto, Jin (1892) | Draw 1-1 | Nieminen, Tuomo (1873) |