Kumura, Kazuya
Current rating: 1601
Record: 21-15-1
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1550 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 308 | Fukuda, Kodai (1500) | Won 2-0 | +171567 |
| 2sealed | 175 | Matsuzaki, Ryuta (1501) | Draw 1-1 | -11566 |
| 3sealed | 556 | Tanaka, Yuichi (1589) | Lost 1-2 | -171549 |
| 4sealed | 765 | Matsui, Hideyuki (1466) | Won 2-0 | +161565 |
| 5sealed | 529 | Oe, Rei (1519) | Won 2-0 | +171582 |
| 6sealed | 325 | Guo, Cheng (1619) | Won 2-0 | +191601 |
| 7sealed | 198 | Tokumiya, Hirofumi (1563) | Won 2-0 | +171618 |
| 8sealed | 114 | Kakinoki, Junichi (1676) | Lost 0-2 | -171601 |
| top | average opponent: 1554record: 5-2-1 | new rating: 1601 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1554 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 342 | Kimura, Tatsuhiro (1475) | Won 2-0 | +171571 |
| 2standard | 630 | Aizawa, Tamotsu (1545) | Won 2-0 | +171588 |
| 3standard | 608 | Kamei, Toshio (1573) | Lost 1-2 | -181570 |
| 4standard | 689 | Katabira, Shoji (1561) | Won 2-1 | +181588 |
| 5standard | 534 | Igarashi, Takuma (1551) | Lost 1-2 | -191569 |
| 6standard | 709 | Yamada, Hiroaki (1521) | Lost 0-2 | -191550 |
| top | average opponent: 1537record: 3-3 | new rating: 1550 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 594 | Okuda, Ken (1407) | Won 2-1 | +161533 |
| 2standard | 235 | Kasahara, Takuya (1531) | Won 2-1 | +181551 |
| 3standard | 206 | Kamimura, Fumihiro (1686) | Won 2-1 | +211572 |
| 4standard | 81 | Hino, Yoshiaki (1781) | Lost 1-2 | -151557 |
| 5standard | 278 | Hangyo, Tatsuya (1505) | Lost 1-2 | -181539 |
| 6standard | 707 | Hasegawa, Kazuhiko7811 (1626) | Won 2-1 | +191558 |
| 7standard | 360 | Ono, Ikumi (1399) | Won 2-0 | +151573 |
| 8standard | 256 | Sato, Hikaru0478 (1603) | Lost 0-2 | -171556 |
| 9standard | 444 | Watabe, Tetsuro (1439) | Won 2-0 | +161572 |
| 10standard | 411 | Hayashi, Naoki (1576) | Lost 0-2 | -181554 |
| 11standard | 378 | Kasuga, Ryou (1556) | Won 2-1 | +181572 |
| 12standard | 305 | Sakuma, Toshimitsu (1599) | Lost 0-2 | -181554 |
| top | average opponent: 1559record: 7-5 | new rating: 1554 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 571 | Watanabe, Kenji (Tokyo) (1483) | Won 2-1 | +181518 |
| 2standard | 515 | Yamaguchi, Yu (1461) | Lost 1-2 | -191499 |
| 3standard | 1118 | Jinba, Daisuke (1422) | Lost 1-2 | -201479 |
| 4standard | 1467 | Mizuno, Yuya (1394) | Won 2-1 | +171496 |
| 5standard | 889 | Takeda, Yuki (1499) | Won 2-1 | +181514 |
| 6standard | 875 | Kawakami, Tomoyori (1537) | Won 2-0 | +181532 |
| 7standard | 486 | Nagasawa, Kensuke (1662) | Won 2-1 | +211553 |
| 8standard | 349 | Utsunomiya, Takumi (1591) | Won 2-1 | +181571 |
| 9standard | 267 | Kasuga, Ryou (Nagano) (1552) | Lost 0-2 | -181553 |
| 10standard | 280 | Habata, Issei (1628) | Lost 1-2 | -171536 |
| 11standard | 430 | Oshima, Shimpei (1484) | Lost 1-2 | -191517 |
| top | average opponent: 1519record: 6-5 | new rating: 1517 | ||