| event | round | table | player one | result | player two |
| Grand Prix Bangkok 2007 | 10 | 25 | Nakajima, Chikara (1674) | Lost 1-2 | Ootsuka, Koutarou (2003) |
| Grand Prix Kobe 2009 | 12 | 3 | Nakajima, Chikara (1821) | Won 2-0 | Ootsuka, Koutarou (2100) |
| Grand Prix Bangkok 2009 | 10 | 6 | Nakajima, Chikara (1856) | Lost 0-2 | Ootsuka, Koutarou (2175) |
| Pro Tour Amsterdam 2010 | 8 | 122 | Nakajima, Chikara (1677) | Won 2-1 | Ootsuka, Koutarou (1984) |