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