| event | round | table | player one | result | player two |
| Grand Prix Hiroshima 2001 | 9 | 8 | Mori, Katsuhiro (1751) | Won 2-1 | Ishida, Itaru (1611) |
| Grand Prix Sendai 2001 | 7 | 3 | Mori, Katsuhiro (1947) | ID | Ishida, Itaru (1813) |
| 2002 World Championship | 18 | 26 | Mori, Katsuhiro (1904) | ID | Ishida, Itaru (1794) |
| 2004 World Championship | 14 | 32 | Mori, Katsuhiro (1957) | Won 2-1 | Ishida, Itaru (1874) |
| Grand Prix Kitakyushu 2005 | 13 | 4 | Mori, Katsuhiro (2048) | Lost 0-2 | Ishida, Itaru (2038) |