event | round | table | player one | result | player two |
Grand Prix Bangkok 2007 | 12 | 2 | Mitamura, Kazuya (1914) | Lost 0-2 | Nakajima, Chikara (1677) |
Grand Prix Okayama 2008 | S | Mitamura, Kazuya (2036) | Won 2-0 | Nakajima, Chikara (1831) | |
Grand Prix Singapore 2011 | 6 | 20 | Mitamura, Kazuya (1950) | Lost 0-2 | Nakajima, Chikara (1794) |