event | round | table | player one | result | player two |
Grand Prix Shizuoka 2008 | 14 | 7 | Sunada, Shougo (1610) | Won 2-1 | Nakamura, Hajime (1611) |
Grand Prix Yokohama 2010 | 12 | 20 | Sunada, Shougo (1749) | Lost 0-2 | Nakamura, Hajime (1940) |
Grand Prix Kobe 2011 | 6 | 14 | Sunada, Shougo (1848) | Lost 0-2 | Nakamura, Hajime (1815) |