| event | round | table | player one | result | player two |
| 2007 World Championship | 12 | 2 | Ootsuka, Koutarou (2063) | Lost 1-2 | Nakano, Yoshitaka (1950) |
| Grand Prix Taipei 2008 | 4 | 15 | Ootsuka, Koutarou (2059) | Won 2-1 | Nakano, Yoshitaka (1983) |
| 2008 World Championship | 13 | 11 | Ootsuka, Koutarou (2079) | Lost 0-2 | Nakano, Yoshitaka (2081) |
| Grand Prix Kobe 2009 | 7 | 41 | Ootsuka, Koutarou (2099) | Won 2-0 | Nakano, Yoshitaka (2079) |