| event | round | table | player one | result | player two |
| Grand Prix Shizuoka 2003 | 9 | 1 | Harada, Satoshi (1700) | Draw 1-1 | Kato, Kazuki (1884) |
| Grand Prix Shizuoka 2003 | 13 | 30 | Harada, Satoshi (1718) | Lost 1-2 | Kato, Kazuki (1890) |
| Grand Prix Shizuoka 2003 | F | Harada, Satoshi (1758) | Lost 1-2 | Kato, Kazuki (1939) |