Ooishi, Ren
Current rating: 1481
Record: 6-7
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1479 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 186 | Otsubo, Kazuhito (1500) | Lost 0-2 | -181461 |
| 2pioneer | 512 | Fujiya, Takahiro (1578) | Won 2-1 | +201481 |
| 3pioneer | 691 | Aoki, Takashi (1486) | Lost 0-2 | -171464 |
| 4pioneer | 665 | Yamashita, Kohji (1212) | Lost 1-2 | -231441 |
| 5pioneer | 734 | Kohagura, Masataka (1386) | Won 2-0 | +171458 |
| 6pioneer | 590 | Kusunoki, Yuki (1735) | Won 2-0 | +231481 |
| average opponent: 1483record: 3-3 | new rating: 1481 | |||
| Grand Prix Nagoya 2012 (RTR standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 30 | Hirooka, Toshiki (1500) | Lost 0-2 | -181482 |
| 2standard | 607 | Minoshima, Takenori (1374) | Won 2-0 | +161498 |
| 3standard | 630 | Shimada, Hiroya (1644) | Lost 0-2 | -151483 |
| 4standard | 634 | Miura, Akane (1483) | Won 2-1 | +181501 |
| 5standard | 472 | Noji, Tomoyuki (1376) | Lost 1-2 | -211480 |
| 6standard | 588 | Umemura, Kouhei (1481) | Won 2-1 | +181498 |
| 7standard | 437 | Ooshima, Junji (1418) | Lost 0-2 | -191479 |
| average opponent: 1468record: 3-4 | new rating: 1479 | |||