| event | round | table | player one | result | player two |
| Grand Prix Okayama 2004 | 13 | 8 | Asahara, Akira (1937) | Draw 1-1 | Nakajima, Chikara (1715) |
| Grand Prix Okayama 2004 | Q | Asahara, Akira (1948) | Won 2-1 | Nakajima, Chikara (1737) | |
| 2011 World Championship | 8 | 48 | Asahara, Akira (2030) | Lost 0-2 | Nakajima, Chikara (1994) |
| Grand Prix Kobe 2012 | 10 | 49 | Asahara, Akira (2043) | Won 2-0 | Nakajima, Chikara (2061) |