| event | round | table | player one | result | player two |
| Grand Prix Okayama 2004 | 8 | 17 | Okamoto, Jin (1884) | Won 2-0 | Nakamura, Shuhei (1868) |
| Grand Prix Yokohama 2004 | 8 | 46 | Okamoto, Jin (1893) | Won 2-1 | Nakamura, Shuhei (2018) |
| Grand Prix Kobe 2009 | 11 | 32 | Okamoto, Jin (1937) | Lost 1-2 | Nakamura, Shuhei (2072) |