| event | round | table | player one | result | player two |
| Grand Prix Sendai 2001 | 6 | 6 | Shiozu, Ryouma (1854) | Lost 0-2 | Mori, Katsuhiro (1931) |
| Grand Prix Niigata 2005 | 7 | 4 | Shiozu, Ryouma (1889) | Lost 0-2 | Mori, Katsuhiro (1947) |
| Pro Tour Prague 2006 | 10 | 34 | Shiozu, Ryouma (1912) | Won 2-0 | Mori, Katsuhiro (2052) |
| Grand Prix Yamagata 2006 | 9 | 24 | Shiozu, Ryouma (1869) | Lost 0-2 | Mori, Katsuhiro (2008) |
| Pro Tour Yokohama 2007 | 3 | 28 | Shiozu, Ryouma (1762) | Won 2-1 | Mori, Katsuhiro (2093) |