Kokubun, Taiki
Current rating: 1419
Record: 7-12-1
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1453 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 118 | Takehana, Atsushi (1464) | Lost 1-2 | -181435 |
| 2sealed | 595 | Saitou, Kazuya (1570) | Lost 0-2 | -161419 |
| top | average opponent: 1517record: 0-2 | new rating: 1419 | ||
| Grand Prix Yokohama 2019 (modern) | starting rating: 1472 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 391 | Kiguchi, Tokiko (1476) | Lost 1-2 | -181454 |
| 2modern | 841 | Tamai, Yuno (1565) | Won 2-0 | +201474 |
| 3modern | 975 | Kurokawa, Kazuaki (1431) | Won 2-0 | +171491 |
| 4modern | 478 | Furujou, Takashi (1308) | Lost 1-2 | -211470 |
| 5modern | 887 | Haraguchi, Mizuki (1523) | Lost 0-2 | -171453 |
| top | average opponent: 1460record: 2-3 | new rating: 1453 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1505 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 565 | Ueda, Ryo (1592) | Lost 0-2 | -161489 |
| 2sealed | 865 | Hata, Tomonori0099 (1426) | Won 2-0 | +171506 |
| 3sealed | 571 | Minobe, Yoshihiro (1501) | Lost 1-2 | -181488 |
| 4sealed | 898 | Ohta, Shun (1608) | Lost 1-2 | -161472 |
| top | average opponent: 1532record: 1-3 | new rating: 1472 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 23 | Ohata, Norio (1479) | Won 2-1 | +181518 |
| 2standard | 301 | Okumura, Noriaki (1619) | Lost 0-2 | -171501 |
| 3standard | 1155 | Kumada, Keiichiro (1532) | Won 2-0 | +191520 |
| 4standard | 556 | Fujiwara, Kazuma (1524) | Lost 1-2 | -181502 |
| 5standard | 893 | Nishikawa, Yukihide (1497) | Draw 1-1 | 01502 |
| 6standard | 991 | Murata, Kazuki (1488) | Lost 0-2 | -181484 |
| 7standard | 1143 | Yoshida, Goh (1479) | Won 2-0 | +181502 |
| 8standard | 909 | Tomita, Kei (1598) | Won 2-1 | +191521 |
| 9standard | 671 | Akita, Naoto (1617) | Lost 1-2 | -161505 |
| top | average opponent: 1537record: 4-4-1 | new rating: 1505 | ||