Okada, Koji
Current rating: 1459
Record: 15-19
| Grand Prix Yokohama 2019 (modern) | starting rating: 1410 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 461 | Owada, Hiroaki (1500) | Won 2-0 | +201430 |
| 2modern | 201 | Toshida, Shin'ichi (1433) | Won 2-1 | +181448 |
| 3modern | 512 | Moreno, Eduardo (1520) | Won 2-0 | +191467 |
| 4modern | 178 | Hoshi, Kazuto (1796) | Lost 0-2 | -121455 |
| 5modern | 246 | Mimido, Ryuji (1496) | Lost 1-2 | -171438 |
| 6modern | 699 | Hamada, Masaki (1542) | Lost 0-2 | -161422 |
| 7modern | 714 | Ishikawa, Jun (1425) | Won 2-0 | +181440 |
| 8modern | 406 | Takehana, Atsushi (1483) | Won 2-0 | +191459 |
| top | average opponent: 1524record: 5-3 | new rating: 1459 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1403 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 84 | Fujii, Takehiro (1523) | Won 2-1 | +201423 |
| 2sealed | 174 | Yan, Xia (1500) | Won 2-1 | +201443 |
| 3sealed | 78 | Kato, Jun (1536) | Lost 0-2 | -161427 |
| 4sealed | 614 | Kurano, Yasuhiro (1520) | Lost 1-2 | -171410 |
| top | average opponent: 1520record: 2-2 | new rating: 1410 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1456 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 418 | Asaoka, Hirotaka (1500) | Lost 1-2 | -181438 |
| 2standard | 863 | Uchiyama, Kouichi (1333) | Lost 1-2 | -191419 |
| 3standard | 1274 | Takahashi, Shiori (1433) | Won 2-1 | +181437 |
| 4standard | 935 | Inoue, Ojiro (1524) | Lost 0-2 | -171420 |
| 5standard | 1178 | Iwata, Ryoji (1471) | Lost 1-2 | -171403 |
| top | average opponent: 1452record: 1-4 | new rating: 1403 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1472 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 402 | Kutsukake, Takuro (1564) | Lost 0-2 | -161456 |
| 2standard | 1232 | Ookata, Akihiro 0810 (1482) | Won 2-1 | +181474 |
| 3standard | 1026 | Ota, Kyosuke (1464) | Won 2-0 | +181492 |
| 4standard | 651 | Tansei, Hiroyuki (1404) | Lost 0-2 | -201472 |
| 5standard | 843 | Monzen, Hidetake (1495) | Lost 0-2 | -171455 |
| 6standard | 1092 | Takahashi, Hirokazu (1447) | Won 2-0 | +181473 |
| 7standard | 857 | Tsuchida, Shinnosuke (1499) | Lost 0-2 | -181455 |
| 8standard | 932 | Akase, Yosuke (1423) | Lost 0-2 | -191436 |
| 9standard | 839 | Nunotani, Kousuke (1500) | Won 2-1 | +201456 |
| top | average opponent: 1475record: 4-5 | new rating: 1456 | ||
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 135 | Kawaguchi, Takahiro (1669) | Lost 1-2 | -151485 |
| 2standard | 578 | Yoshioka, Shunsuke (1480) | Won 2-1 | +181503 |
| 3standard | 660 | Yamamoto, Yasutaka (1500) | Lost 0-2 | -181485 |
| 4standard | 949 | Nakano, Tsubasa (1485) | Lost 1-2 | -181467 |
| 5standard | 1044 | Munakata, Hirofumi (1461) | Won 2-0 | +181485 |
| 6standard | 818 | Fujita, Osamu (1725) | Lost 0-2 | -141471 |
| 7standard | 750 | Koizumi, Hiroki (1437) | Won 2-1 | +171488 |
| 8standard | 571 | Emori, Shinichi (1567) | Lost 1-2 | -161472 |
| top | average opponent: 1541record: 3-5 | new rating: 1472 | ||