| event | round | table | player one | result | player two |
| Grand Prix Nagoya 2004 | 5 | 40 | Hamamoto, Kenji (1645) | Lost 0-2 | Nakamura, Shuhei (1842) |
| Grand Prix Niigata 2005 | 6 | 10 | Hamamoto, Kenji (1671) | Won 2-1 | Nakamura, Shuhei (2002) |
| Grand Prix Kobe 2009 | 8 | 11 | Hamamoto, Kenji (1679) | Won 2-0 | Nakamura, Shuhei (2072) |