Itaya, Tomohisa
Current rating: 1427
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1454 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 104 | Harada, Ryoichi (1604) | Lost 1-2 | -151439 |
| 2pioneer | 591 | Oota, Yusuke (1696) | Won 2-0 | +231462 |
| 3pioneer | 520 | Takazawa, Takafumi (1497) | Lost 1-2 | -181444 |
| 4pioneer | 585 | Wada, Tomoya (1498) | Lost 1-2 | -171427 |
| top | average opponent: 1574record: 1-3 | new rating: 1427 | ||
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1448 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 121 | Shirato, Yutaro (1426) | Lost 1-2 | -181430 |
| 2sealed | 776 | Yasuda, Kimihiko (1394) | Lost 1-2 | -191411 |
| 3sealed | 1106 | Murakami, Hiroaki (1447) | Won 2-0 | +191430 |
| 4sealed | 791 | Wang, Arthur (1727) | Won 2-0 | +231453 |
| 5sealed | 635 | Furuichi, Takenori (1371) | Won 2-0 | +171470 |
| 6sealed | 401 | Ohtsuka, Fukuo (1617) | Lost 0-2 | -161454 |
| top | average opponent: 1497record: 3-3 | new rating: 1454 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 4 | Mutou, Yoshinosuke (1463) | Lost 1-2 | -191481 |
| 2sealed | 869 | Fukuta, Shingo (1634) | Lost 1-2 | -151466 |
| 3sealed | 1097 | Ishigaki, Shogo (1476) | Lost 1-2 | -181448 |
| top | average opponent: 1524record: 0-3 | new rating: 1448 | ||