Koutarou Ootsuka trails the series against
Kenji Tsumura, 2-4-1.
| event |
round |
table |
player one |
result |
player two |
| Pro Tour Nagoya 2005 | 5 | 87 | Ootsuka, Koutarou (1736) | Won 2-1 | Tsumura, Kenji (1675) |
| Grand Prix Matsuyama 2005 | 10 | 18 | Ootsuka, Koutarou (1768) | Lost 1-2 | Tsumura, Kenji (1849) |
| Grand Prix Taipei 2005 | 5 | 3 | Ootsuka, Koutarou (1722) | Draw 1-1 | Tsumura, Kenji (1935) |
| 2005 World Championship | 14 | 11 | Ootsuka, Koutarou (1838) | Lost 1-2 | Tsumura, Kenji (2134) |
| Grand Prix Singapore 2007 | 11 | 8 | Ootsuka, Koutarou (1872) | Won 2-1 | Tsumura, Kenji (2211) |
| 2008 World Championship | 16 | 7 | Ootsuka, Koutarou (2093) | Lost 0-2 | Tsumura, Kenji (1982) |
| Pro Tour Kyoto 2009 | 1 | 85 | Ootsuka, Koutarou (2087) | Lost 0-1 | Tsumura, Kenji (2010) |