Kubota, Kei
Current rating: 1523
Record: 24-23 (GP) / 3-5 (professional)
| Regional Championships Aichi 2023 (pioneer) | starting rating: 1567 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 24 | Yasooka, Shota (2039) | Lost 1-2 | -101557 |
| 2pioneer | 84 | Mori, Noriyuki (1824) | Lost 1-2 | -131544 |
| 3pioneer | 121 | Kawai, Riku (1418) | Lost 0-2 | -211523 |
| top | average opponent: 1761record: 0-3 | new rating: 1523 | ||
| Regional Championships Chiba 2023 (pioneer) | starting rating: 1551 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 56 | kitada, natsuki (1500) | Won 2-0 | +181569 |
| 2pioneer | 2 | Ishiwata, Kouichi (1721) | Won 2-1 | +201589 |
| 3pioneer | 8 | Miyawaki, Takeshi (1578) | Lost 0-2 | -181571 |
| 4pioneer | 49 | Kondo, Shogo (1749) | Won 2-0 | +211592 |
| 5pioneer | 26 | Kato, Hiromu (1515) | Won 2-1 | +171609 |
| 6pioneer | 5 | Sato, Rei (2053) | Won 2-1 | +251634 |
| 7pioneer | 11 | Obara, Yuichiro (1574) | Lost 0-2 | -191615 |
| 8pioneer | 15 | Honda, Rintaro (1824) | Lost 1-2 | -141601 |
| 9pioneer | 24 | Kono, Toru (1733) | Won 2-1 | +201621 |
| 10pioneer | 20 | Sugimoto, Takashi (1604) | Lost 0-2 | -181603 |
| 11pioneer | 23 | Yoshimura, Takuya (1544) | Lost 0-2 | -191584 |
| 12pioneer | 23 | Tezuka, Takatomo (1626) | Lost 1-2 | -171567 |
| top | average opponent: 1668record: 6-6 | new rating: 1567 | ||
| Players Tour Online 4 (MTGA IKO standard) | starting rating: 1573 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 9 | Sesto, Julian (1500) | Won 2-0 | +171590 |
| 2standard | 3 | Gobern, Luis (2007) | Won 2-0 | +251615 |
| 3standard | 37 | Sinforoso, Manuel (1546) | Lost 1-2 | -201595 |
| 4standard | 38 | Mertins, Alexander (2002) | Lost 0-2 | -111584 |
| 5standard | 102 | Hocquemiller, Arnaud (1929) | Lost 1-2 | -111573 |
| 6standard | 88 | Lee, Kyle (1407) | Won 2-0 | +151588 |
| 7standard | 56 | Bracht, Maximilian (1650) | Lost 1-2 | -171571 |
| 8standard | 90 | Santos, Andre (1504) | Lost 1-2 | -201551 |
| top | average opponent: 1693record: 3-5 | new rating: 1551 | ||
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1550 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 108 | Kobayashi, Takahito (1821) | Won 2-0 | +231573 |
| 2standard | 61 | Kimura, Minori (1399) | Lost 0-2 | -211552 |
| 3standard | 750 | Yoshikawa, Yuuki (1544) | Won 2-1 | +171569 |
| 4standard | 587 | Maseguchi, Masashi (1380) | Won 2-0 | +151584 |
| 5standard | 321 | Akimoto, Taiki (1494) | Lost 0-2 | -201564 |
| 6standard | 360 | Kawabata, Hiromasa (1536) | Won 2-0 | +181582 |
| 7standard | 411 | Takahashi, Yuto (1642) | Won 2-1 | +191601 |
| 8standard | 183 | Okumura, Yuji (1793) | Won 2-1 | +211622 |
| 9standard | 141 | Yeh, Rueyjer (1646) | Won 2-1 | +191641 |
| 10standard | 124 | Harumoto, Takashi (1549) | Lost 0-2 | -201621 |
| 11standard | 103 | Asai, Ikuya (1688) | Won 2-1 | +191640 |
| 12standard | 109 | Oohashi, Toshiyuki (1734) | Lost 0-2 | -161624 |
| 13standard | 129 | Shimizu, Ryouta (1636) | Lost 1-2 | -181606 |
| 14standard | 118 | Bin, Jia (1825) | Lost 0-2 | -141592 |
| 15standard | 133 | Yamamoto, Shinya 8409 (1516) | Lost 1-2 | -191573 |
| top | average opponent: 1614record: 8-7 | new rating: 1573 | ||
| Grand Prix Shizuoka 2018 (legacy) (legacy) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 272 | Nakanishi, Kazuki (1393) | Lost 1-2 | -211500 |
| 2legacy | 359 | Shibuya, Toru (1482) | Won 2-0 | +181518 |
| 3legacy | 441 | Kusakawa, Naoto (1386) | Won 2-0 | +161534 |
| 4legacy | 343 | Hatakeyama, Shota (1510) | Lost 1-2 | -191515 |
| 5legacy | 346 | Kamiyama, Daiki (1492) | Won 2-0 | +181533 |
| 6legacy | 205 | Tasugi, Keigo (1428) | Lost 1-2 | -201513 |
| 7legacy | 360 | Inoue, Akira (1497) | Won 2-1 | +171530 |
| 8legacy | 217 | Moriya, Yuta (1604) | Won 2-0 | +201550 |
| top | average opponent: 1474record: 5-3 | new rating: 1550 | ||
| Grand Prix Chiba 2016 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 764 | Marallag, Zoilo (1453) | Lost 1-2 | -191481 |
| 2legacy | 566 | Kumon, Shun (1473) | Won 2-0 | +181499 |
| 3legacy | 635 | Andou, Koutarou (1650) | Won 2-0 | +211520 |
| 4legacy | 772 | Kaihara, Shunsuke (1514) | Won 2-0 | +181538 |
| 5legacy | 235 | Kamioka, Masayuki (1591) | Won 2-0 | +191557 |
| 6legacy | 164 | Liu, Yi Pang (1534) | Lost 0-2 | -191538 |
| 7legacy | 366 | Hayashi, Hisaaki (1521) | Won 2-1 | +181556 |
| 8legacy | 160 | Yamaguchi, Shouta (1577) | Lost 1-2 | -181538 |
| 9legacy | 287 | Ine, Ryosuke (1554) | Lost 1-2 | -171521 |
| top | average opponent: 1541record: 5-4 | new rating: 1521 | ||