Kotajima, Naoya
Current rating: 1447
Record: 3-6
| Grand Prix Yokohama 2010 (extended) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 434 | Futami, Yousuke (1500) | Lost 1-2 | -171464 |
| 2extended | 399 | Nakao, Toshitaka (1480) | Won 2-1 | +181482 |
| 3extended | 256 | Abe, Nozomu (1501) | Lost 1-2 | -181464 |
| 4extended | 366 | Paik, Hoon Kew (1484) | Lost 1-2 | -171447 |
| average opponent: 1491record: 1-3 | new rating: 1447 | |||
| Grand Prix Niigata 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 112 | Katagiri, Toshiki (1463) | Lost 1-2 | -191481 |
| 2sealed | 221 | Nishimura, Shinya (1482) | Won 2-0 | +181499 |
| 3sealed | 134 | Yoshikawa, Takahiro (1480) | Won 2-0 | +181517 |
| 4sealed | 207 | Ichikawa, Hiroshi (1518) | Lost 0-2 | -181499 |
| 5sealed | 167 | Uchida, Yuki (1510) | Lost 0-2 | -181481 |
| average opponent: 1491record: 2-3 | new rating: 1481 | |||