| event | round | table | player one | result | player two |
| Grand Prix Sendai 2004 | 14 | 16 | Yamamoto, Kentaro (1705) | Won 2-0 | Mori, Katsuhiro (2020) |
| Grand Prix Yokohama 2010 | 9 | 3 | Yamamoto, Kentaro (1929) | Won 2-1 | Mori, Katsuhiro (2094) |
| Grand Prix Shizuoka 2013 | 14 | 16 | Yamamoto, Kentaro (2082) | Lost 1-2 | Mori, Katsuhiro (2021) |
| Grand Prix Sydney 2016 | 9 | 13 | Yamamoto, Kentaro (2063) | Won 2-1 | Mori, Katsuhiro (2087) |