Isowaki, Naoto
Current rating: 1548
Record: 8-6-1
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1529 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2316 | Saito, Toru (1500) | Lost 1-2 | -191510 |
| 2sealed | 2277 | Hizumi, Takahisa (1481) | Draw 1-1 | 01510 |
| 3sealed | 2414 | Genno, Yuusuke (1496) | Won 2-0 | +171527 |
| 4sealed | 2319 | Mine, Masahiro (1499) | Won 2-0 | +181545 |
| 5sealed | 2213 | Nishimura, Koichi (1435) | Won 2-1 | +161561 |
| 6sealed | 2134 | Sasaki, Yuuta (1834) | Lost 1-2 | -131548 |
| 7sealed | 2197 | Ishiwata, Hyuuma (1506) | Won 2-0 | +171565 |
| 8sealed | 2134 | Kondou, Yoshiki (1631) | Lost 1-2 | -171548 |
| average opponent: 1548record: 4-3-1 | new rating: 1548 | |||
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 98 | Hirata, Keisuke (1500) | Won 2-1 | +181518 |
| 2sealed | 206 | Sakai, Takashi (1580) | Won 2-1 | +191537 |
| 3sealed | 26 | Minami, Masashi (1658) | Won 2-0 | +201557 |
| 4sealed | 62 | Minegishi, Takuya (1554) | Won 2-0 | +181575 |
| 5sealed | 15 | Hanazono, Ryuzo (1578) | Lost 0-2 | -181557 |
| 6sealed | 35 | Mita, Ryoichi (1530) | Lost 0-2 | -181539 |
| 7sealed | 188 | Chiba, Akio (1995) | Lost 1-2 | -101529 |
| average opponent: 1628record: 4-3 | new rating: 1529 | |||