| event | round | table | player one | result | player two |
| 2008 World Championship | 15 | 8 | Ootsuka, Koutarou (2077) | Won 2-0 | Watanabe, Yuuya (1942) |
| Grand Prix Singapore 2009 | 13 | 9 | Ootsuka, Koutarou (2031) | Won 2-0 | Watanabe, Yuuya (1880) |
| Grand Prix Bangkok 2009 | 14 | 39 | Ootsuka, Koutarou (2208) | ID | Watanabe, Yuuya (1941) |
| Grand Prix Kobe 2011 | 6 | 92 | Ootsuka, Koutarou (1842) | Won 2-0 | Watanabe, Yuuya (1963) |