Ishikawa, Reiji
Current rating: 1442
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1468 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 22 | Sato, Kosuke (1467) | Won 2-1 | +181486 |
| 2pioneer | 370 | Nakamura, Yusuke9902 (1843) | Lost 1-2 | -121474 |
| 3pioneer | 456 | Shiotani, Keiichiro (1543) | Lost 0-2 | -171457 |
| 4pioneer | 749 | Ichikawa, Shoichi (1623) | Lost 1-2 | -151442 |
| top | average opponent: 1619record: 1-3 | new rating: 1442 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1506 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 492 | Tsutsumi, Ryuta (1464) | Lost 1-2 | -191487 |
| 2sealed | 893 | Shimamura, Jumpei (1440) | Lost 1-2 | -191468 |
| 3sealed | 1135 | Takeichi, Yugo (1464) | Won 2-0 | +181486 |
| 4sealed | 844 | Choi, Jaekyoo (1481) | Lost 1-2 | -181468 |
| top | average opponent: 1462record: 1-3 | new rating: 1468 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 742 | Kawaguchi, Naok (1500) | Won 2-0 | +181518 |
| 2standard | 283 | Hasizume, Shoutarou (1465) | Won 2-1 | +171535 |
| 3standard | 147 | Isayama, Yusuke (1707) | Lost 0-2 | -151520 |
| 4standard | 1001 | Nishikori, Kouji (1405) | Won 2-0 | +161536 |
| 5standard | 414 | Hayashi, Shouya (1797) | Lost 1-2 | -131523 |
| 6standard | 924 | Matsuda, Issui (1579) | Lost 1-2 | -171506 |
| top | average opponent: 1575record: 3-3 | new rating: 1506 | ||