event | round | table | player one | result | player two |
Grand Prix Kyoto 2007 | 7 | 9 | Iyanaga, Junya (1724) | Lost 0-2 | Shimizu, Naoki (1594) |
Grand Prix Kobe 2008 | 5 | 38 | Iyanaga, Junya (2024) | Won 2-0 | Shimizu, Naoki (1779) |
Grand Prix Kitakyushu 2009 | 8 | 2 | Iyanaga, Junya (1929) | Won 2-0 | Shimizu, Naoki (2003) |