| event | round | table | player one | result | player two |
| Grand Prix Kobe 2001 | S | Ishida, Itaru (1716) | Won 2-0 | Nagaoka, Takayuki (1676) | |
| Grand Prix Fukuoka 2002 | 5 | 6 | Ishida, Itaru (1855) | Won 2-1 | Nagaoka, Takayuki (1716) |
| Grand Prix Shizuoka 2003 | 5 | 11 | Ishida, Itaru (1985) | Lost 1-2 | Nagaoka, Takayuki (1771) |
| Grand Prix Hiroshima 2006 | 11 | 22 | Ishida, Itaru (1896) | Lost 0-2 | Nagaoka, Takayuki (1691) |