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