| event | round | table | player one | result | player two |
| Pro Tour Tokyo 2001 | 14 | 50 | Shiozu, Ryouma (1602) | Lost 1-2 | Asahara, Akira (1575) |
| Grand Prix Kyoto 2003 | Q | Shiozu, Ryouma (1913) | Lost 1-2 | Asahara, Akira (1939) | |
| Grand Prix Sendai 2004 | 5 | 24 | Shiozu, Ryouma (1964) | Lost 1-2 | Asahara, Akira (1894) |
| Grand Prix Niigata 2005 | 9 | 7 | Shiozu, Ryouma (1886) | Lost 1-2 | Asahara, Akira (2024) |
| Grand Prix Shizuoka 2008 | 5 | 123 | Shiozu, Ryouma (1797) | Lost 0-2 | Asahara, Akira (1931) |