| event | round | table | player one | result | player two |
| Grand Prix Kyoto 2007 | 9 | 12 | Kitayama, Masaya (1759) | Lost 1-2 | Iyanaga, Junya (1720) |
| Grand Prix Shizuoka 2008 | 7 | 226 | Kitayama, Masaya (1829) | Won 2-1 | Iyanaga, Junya (1944) |
| Grand Prix Singapore 2009 | 12 | 7 | Kitayama, Masaya (1880) | Won 2-0 | Iyanaga, Junya (1964) |
| Grand Prix Bangkok 2009 | 11 | 15 | Kitayama, Masaya (1877) | Won 2-0 | Iyanaga, Junya (1949) |