| event | round | table | player one | result | player two |
| Grand Prix Yokohama 2003 | 5 | 139 | Yamamoto, Akimasa (1608) | Won 2-1 | Ootsuka, Koutarou (1555) |
| Grand Prix Shizuoka 2008 | 5 | 35 | Yamamoto, Akimasa (1696) | Won 2-0 | Ootsuka, Koutarou (2029) |
| Grand Prix Hiroshima 2011 | 9 | 8 | Yamamoto, Akimasa (1811) | Won 2-0 | Ootsuka, Koutarou (1782) |