Oikawa, Hiroaki
Current rating: 1502
Record: 19-22
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1499 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 273 | Toyooka, Shinichi (1557) | Lost 0-2 | -171482 |
| 4standard | 433 | Sasagawa, Hitoshi (1470) | Lost 1-2 | -181464 |
| 5standard | 553 | Tokunaga, Takayuki (1406) | Won 2-1 | +171481 |
| 6standard | 396 | Tsuzaki, Akira (1572) | Lost 1-2 | -171464 |
| 7standard | 471 | Iwata, Noriaki (1494) | Won 2-0 | +191483 |
| 8standard | 361 | Kato, Atushi (1536) | Won 2-0 | +191502 |
| top | average opponent: 1506record: 3-3 | new rating: 1502 | ||
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1548 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 215 | Mashima, Mitsuharu (1792) | Lost 0-2 | -141534 |
| 4sealed | 434 | Gotou, Hiroyuki (1621) | Lost 1-2 | -161518 |
| 5sealed | 845 | Oohusa, Ryohei (1455) | Lost 0-2 | -191499 |
| top | average opponent: 1623record: 0-3 | new rating: 1499 | ||
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 108 | Itou, Tomoya (1568) | Won 2-0 | +191540 |
| 3standard | 214 | Mikami, Yoshirou (1780) | Won 2-0 | +231563 |
| 4standard | 201 | Oohashi, Toshiyuki (1711) | Lost 0-2 | -161547 |
| 5standard | 155 | Yabe, Tomoyoshi (1442) | Lost 1-2 | -201527 |
| 6standard | 329 | Tada, Mitsuhiro (1771) | Won 2-1 | +231550 |
| 7standard | 222 | Kurosawa, Yuuki7831 (1433) | Won 2-1 | +161566 |
| 8standard | 293 | Takemoto, Hikaru (1583) | Lost 1-2 | -181548 |
| top | average opponent: 1613record: 4-3 | new rating: 1548 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1503 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 213 | Miyagishi, Kohei (1602) | Lost 0-2 | -171486 |
| 3standard | 644 | Aizawa, Tamotsu (1527) | Won 2-1 | +191505 |
| 4standard | 764 | Kusuzawa, Takuma (1476) | Won 2-0 | +181523 |
| 5standard | 466 | Kawamura, Naoki (1412) | Lost 0-2 | -201503 |
| 6standard | 540 | Kondo, Hirotsugu (1384) | Won 2-0 | +151518 |
| 7standard | 577 | Kitaoka, Takaaki (1707) | Lost 1-2 | -141504 |
| 8standard | 549 | Nakayama, Kenichi (1482) | Won 2-1 | +171521 |
| top | average opponent: 1513record: 4-3 | new rating: 1521 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1448 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 188 | Yamagata, Yutaro (1581) | Won 2-1 | +201468 |
| 3sealed | 375 | Kimura, Shigeki (1798) | Won 2-0 | +241492 |
| 4sealed | 10 | Tanaka, Akira8259 (1468) | Won 2-1 | +181510 |
| 5sealed | 23 | Ishimura, Shintaro (2117) | Won 2-1 | +281538 |
| 6sealed | 27 | Shirakihara, Ryuuichi (1409) | Won 2-0 | +151553 |
| 7sealed | 27 | Matuoka, Akira (1526) | Won 2-0 | +181571 |
| 8sealed | 16 | Takimura, Kazuyuki (2125) | Lost 1-2 | -91562 |
| 9sealed | 21 | Ishikawa, Masahide (1647) | Lost 0-2 | -171545 |
| 10draft | 551 | Kimura, Kenta (1492) | Lost 0-2 | -191526 |
| 11draft | 723 | Hayashi, Shinsuke (1858) | Lost 1-2 | -121514 |
| 12draft | 608 | Higaki, Motohide (1670) | Won 2-0 | +211535 |
| 13draft | 566 | Pacis, Jack Nicholle (1681) | Lost 0-2 | -151520 |
| 14draft | 564 | Fan, Yiduo (1569) | Lost 0-2 | -171503 |
| top | average opponent: 1688record: 7-6 | new rating: 1503 | ||
| Grand Prix Chiba 2016 (legacy) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 580 | Ichimura, Naoya (1500) | Lost 0-2 | -171448 |
| top | record: 0-1 | new rating: 1448 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2014 | Ookawa, Yuusuke (1545) | Lost 0-2 | -171483 |
| 2sealed | 2394 | Jiang, Norman (1482) | Lost 0-2 | -181465 |
| 3sealed | 2466 | Morimura, Kenichi (1483) | Lost 0-2 | -181447 |
| 4sealed | 2431 | Kanaya, Akihiro (1452) | Won 2-0 | +181465 |
| top | average opponent: 1491record: 1-3 | new rating: 1465 | ||