Hirokawa, Tatsuya 2023
Current rating: 1603
Record: 13-8
| Grand Prix Yokohama 2019 (modern) | starting rating: 1539 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 242 | Miyamoto, Keisuke (1391) | Lost 1-2 | -211518 |
| 4modern | 470 | Uzawa, Yuya (1554) | Won 2-0 | +191537 |
| 5modern | 428 | Watanabe, Takefumi (1532) | Won 2-0 | +181555 |
| 6modern | 216 | Watanabe, Kai (1576) | Won 2-0 | +181573 |
| 7modern | 121 | Kobayashi, Jotaro (1757) | Won 2-1 | +211594 |
| 8modern | 43 | Takagi, Takayuki (1787) | Lost 1-2 | -141580 |
| 9modern | 227 | Kawasaki, Hirotaka (1802) | Won 2-0 | +221602 |
| 10modern | 89 | Nagao, Taku (1562) | Won 2-0 | +171619 |
| 11modern | 75 | Nakamura, Hajime (1761) | Won 2-1 | +211640 |
| 12modern | 24 | Yamamura, Toshiki (1654) | Lost 0-2 | -181622 |
| 13modern | 63 | Taniguchi, Yuusuke (1605) | Lost 1-2 | -181604 |
| 14modern | 117 | Toriuchi, Daizo (1577) | Won 2-0 | +171621 |
| 15modern | 67 | Suzuki, Shota 7488 (1622) | Lost 1-2 | -181603 |
| average opponent: 1629record: 8-5 | new rating: 1603 | |||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 468 | Isomura, Takuya (1466) | Lost 0-2 | -191481 |
| 2sealed | 898 | Kashiwase, Kazuya (1624) | Won 2-0 | +211502 |
| 3sealed | 736 | Tokuma, Hikaru (1550) | Won 2-0 | +191521 |
| 4sealed | 382 | Tanaka, Fumiya 1717 (1506) | Won 2-0 | +181539 |
| 5sealed | 338 | Saito, Shigeru (1461) | Won 2-0 | +161555 |
| 6sealed | 300 | Yamauchi, Takashi (1426) | Lost 1-2 | -201535 |
| 7sealed | 495 | Obata, Ken (1549) | Won 2-1 | +181553 |
| 8sealed | 337 | Izumi, Hikaru (1751) | Lost 0-2 | -141539 |
| average opponent: 1542record: 5-3 | new rating: 1539 | |||