, 3-2-1.
| event |
round |
table |
player one |
result |
player two |
| Grand Prix Hiroshima 2001 | 6 | 5 | Ishida, Itaru (1591) | Won 2-1 | Morita, Masahiko (1548) |
| Grand Prix Sendai 2001 | 8 | 3 | Ishida, Itaru (1813) | Won 2-1 | Morita, Masahiko (1808) |
| Grand Prix Sapporo 2002 | S | | Ishida, Itaru (1878) | Lost 1-2 | Morita, Masahiko (1833) |
| Grand Prix Niigata 2005 | 11 | 6 | Ishida, Itaru (2019) | Lost 0-2 | Morita, Masahiko (2037) |
| Grand Prix Kitakyushu 2005 | 8 | 1 | Ishida, Itaru (2063) | Draw 1-1 | Morita, Masahiko (2094) |
| Grand Prix Kyoto 2007 | 8 | 3 | Ishida, Itaru (1878) | Won 2-0 | Morita, Masahiko (2025) |