Akimasa Yamamoto trails the series against
Tsuyoshi Ikeda, 0-5.
| event |
round |
table |
player one |
result |
player two |
| Grand Prix Kyoto 2003 | 13 | 15 | Yamamoto, Akimasa (1645) | Lost 0-2 | Ikeda, Tsuyoshi (1749) |
| Grand Prix Okayama 2008 | Q | | Yamamoto, Akimasa (1841) | Lost 0-2 | Ikeda, Tsuyoshi (1869) |
| Grand Prix Kobe 2009 | 8 | 63 | Yamamoto, Akimasa (1923) | Lost 0-2 | Ikeda, Tsuyoshi (1887) |
| Grand Prix Niigata 2009 | 13 | 28 | Yamamoto, Akimasa (1950) | Lost 0-2 | Ikeda, Tsuyoshi (1867) |
| Grand Prix Kitakyushu 2009 | 11 | 22 | Yamamoto, Akimasa (1883) | Lost 0-2 | Ikeda, Tsuyoshi (2093) |