| event | round | table | player one | result | player two |
| Grand Prix Yokohama 2012 | 10 | 14 | Kumagai, Riku (1629) | Lost 1-2 | Washimi, Kazuo (1568) |
| Grand Prix Kyoto 2019 | 7 | 31 | Kumagai, Riku (2005) | Won 2-0 | Washimi, Kazuo (1740) |
| Regional Championships Yokohama 2023 | 7 | 13 | Kumagai, Riku (2001) | ID | Washimi, Kazuo (1737) |