| event | round | table | player one | result | player two |
| Grand Prix Shizuoka 2017 | 7 | 34 | Okai, Toshiki (1795) | Won 2-1 | Saito, Shinya (1753) |
| Grand Prix Nagoya 2019 | 8 | 67 | Okai, Toshiki (1871) | Lost 1-2 | Saito, Shinya (1963) |
| Regional Championships Yokohama 2023 | 5 | 30 | Okai, Toshiki (1847) | Won 2-1 | Saito, Shinya (1873) |