Kubota, Hirofumi
Current rating: 1420
Record: 32-45
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1433 | |||
| round | table | opponent (rating) | result | Δrating |
| 2pioneer | 272 | Hasegawa, Shouichi (1557) | Lost 1-2 | -161417 |
| 3pioneer | 551 | Horikawa, Jun (1450) | Lost 0-2 | -181399 |
| 4pioneer | 735 | Nakaima, Shuntarou (1360) | Lost 1-2 | -181381 |
| 5pioneer | 708 | Yamaguchi, Hideki (1462) | Won 2-0 | +191400 |
| 6pioneer | 575 | Iwama, Gaku (1508) | Won 2-1 | +201420 |
| top | average opponent: 1467record: 2-3 | new rating: 1420 | ||
| Grand Prix Yokohama 2019 (modern) | starting rating: 1417 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 92 | Takeuchi, Shunsuke (1518) | Lost 1-2 | -161401 |
| 3modern | 818 | Nagamine, Toshiki (1504) | Won 2-1 | +191420 |
| 4modern | 329 | Sasaki, Yusuke 4501 (1698) | Won 2-1 | +231443 |
| 5modern | 452 | Takahashi, Yu (1557) | Lost 0-2 | -151428 |
| 6modern | 673 | Takamura, Kazuki (1619) | Won 2-0 | +211449 |
| 7modern | 276 | Shimodouzono, Shintaro (1537) | Lost 1-2 | -161433 |
| top | average opponent: 1572record: 3-3 | new rating: 1433 | ||
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1443 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 194 | Katagiri, Shinichi (1691) | Won 2-1 | +221465 |
| 2standard | 189 | Kodama, Kentaro (1411) | Won 2-0 | +171482 |
| 3standard | 145 | Moriya, Toshihiko (1732) | Lost 0-2 | -131469 |
| 4standard | 614 | Murao, Keisuke (1548) | Lost 0-2 | -171452 |
| 5standard | 574 | Sato, Yuya (1495) | Won 2-1 | +191471 |
| 6standard | 340 | Shiraishi, Ryuji (1474) | Lost 0-2 | -181453 |
| 7standard | 471 | Tsuruoka, Shouta (1529) | Lost 1-2 | -171436 |
| 8standard | 512 | Tsunoda, Yotaro (1345) | Lost 0-2 | -191417 |
| top | average opponent: 1528record: 3-5 | new rating: 1417 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1382 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 200 | Inukai, Yuta (1456) | Won 2-0 | +191401 |
| 2standard | 428 | Kurata, Kazuyoshi (1512) | Won 2-0 | +201421 |
| 3standard | 615 | Mizui, Tomoyuki (1494) | Won 2-0 | +191440 |
| 4standard | 401 | Yoshikawa, Hidenobu (1714) | Won 2-1 | +231463 |
| 5standard | 264 | Makino, Tatsuya (1602) | Lost 1-2 | -151448 |
| 6standard | 421 | Komada, Katsuya (1679) | Lost 0-2 | -141434 |
| 7standard | 409 | Saito, Tomoya (1717) | Won 2-1 | +231457 |
| 8standard | 385 | Chen, Xinrong (1673) | Lost 1-2 | -141443 |
| top | average opponent: 1606record: 5-3 | new rating: 1443 | ||
| Grand Prix Shizuoka 2018 (legacy) (legacy) | starting rating: 1406 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 2 | Regalado, Mikhail (1449) | Lost 0-2 | -181388 |
| 2legacy | 377 | Hora, Takeru (1545) | Lost 0-2 | -151373 |
| 3legacy | 617 | Kato, Ataru (1462) | Lost 0-2 | -161357 |
| 4legacy | 680 | Yamanashi, Takeshi (1451) | Won 2-0 | +191376 |
| 5legacy | 617 | Sugiura, Hiroki (1529) | Won 2-1 | +211397 |
| 6legacy | 494 | Takatsuka, Yuuki (1536) | Lost 1-2 | -151382 |
| top | average opponent: 1495record: 2-4 | new rating: 1382 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1373 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 213 | Suzuki, Yasuhiko (1517) | Lost 1-2 | -161357 |
| 3modern | 1013 | Furusawa, Moe (1500) | Won 2-1 | +211378 |
| 4modern | 514 | Fujita, Kazuya (1512) | Won 2-1 | +201398 |
| 5modern | 346 | Amayasu, Kazunori (1566) | Lost 1-2 | -151383 |
| 6modern | 656 | Furusato, Hiroshi (1575) | Won 2-1 | +221405 |
| 7modern | 379 | Pacis, Jack Nicholle (1503) | Lost 1-2 | -161389 |
| 8modern | 634 | Taniguchi, Yuusuke (1630) | Won 2-0 | +221411 |
| 9modern | 465 | Kaga, Hiroyuki (1571) | Won 2-1 | +211432 |
| 10modern | 198 | Hirako, Yuki (1567) | Lost 1-2 | -161416 |
| 11modern | 345 | Nakajima, Shunichi (1545) | Lost 1-2 | -151401 |
| 12modern | 332 | Kida, Masashi (1487) | Won 2-1 | +191420 |
| 13modern | 285 | Miyawaki, Yusuke (1601) | Lost 0-2 | -141406 |
| top | average opponent: 1548record: 6-6 | new rating: 1406 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1412 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 528 | Muramatsu, Kunihiro (1464) | Lost 0-2 | -171395 |
| 3standard | 1104 | Hasegawa, Shouichi (1502) | Lost 1-2 | -171378 |
| 4standard | 1124 | Sugiyama, Fumikazu (1465) | Lost 0-2 | -161362 |
| 5standard | 1150 | Koyama, Noriki (1453) | Won 2-0 | +201382 |
| 6standard | 1105 | Matsubara, Tohru (1723) | Lost 0-2 | -121370 |
| 7standard | 1021 | Inuzuka, Masayuki (1482) | Won 2-0 | +201390 |
| 8standard | 837 | Takahashi, Mitsuaki (1451) | Lost 0-2 | -171373 |
| top | average opponent: 1506record: 2-5 | new rating: 1373 | ||
| Grand Prix Chiba 2016 (legacy) | starting rating: 1396 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 193 | Eto, Kai (1568) | Lost 1-2 | -151381 |
| 3legacy | 927 | Ono, Koutarou (1402) | Lost 1-2 | -171364 |
| 4legacy | 969 | Shimamura, Riku (1548) | Won 2-1 | +211385 |
| 5legacy | 821 | Hashimoto, Rintaro (1505) | Won 2-1 | +201405 |
| 6legacy | 377 | Ohkawa, Shinpei (1486) | Lost 1-2 | -161389 |
| 7legacy | 582 | Basallo III, Ricardo (1454) | Lost 1-2 | -171372 |
| 8legacy | 779 | Niikawa, Shouhei (1484) | Won 2-1 | +201392 |
| 9legacy | 554 | Igarashi, Hisashi (1478) | Won 2-1 | +201412 |
| top | average opponent: 1491record: 4-4 | new rating: 1412 | ||
| Grand Prix Taipei 2016 (SOI standard) | starting rating: 1415 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 106 | Tsai, Shih Tsun (1518) | Lost 0-2 | -161399 |
| 3standard | 224 | Matsumoto, Masataka (1710) | Lost 0-2 | -131386 |
| 4standard | 321 | Lin, Zen Wei (1481) | Won 2-1 | +201406 |
| 5standard | 244 | Chen, Hua (1428) | Won 2-0 | +181424 |
| 6standard | 227 | Huang, Shun-Fa (1547) | Won 2-0 | +211445 |
| 7standard | 99 | Li, Chi (1613) | Lost 0-2 | -151430 |
| 8standard | 204 | Wright, Christopher (1488) | Lost 1-2 | -171413 |
| 9standard | 195 | Chong, Kiat Chau (1502) | Lost 0-2 | -171396 |
| top | average opponent: 1536record: 3-5 | new rating: 1396 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1467 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 150 | Igagami, Hiroyuki (1500) | Won 2-0 | +191486 |
| 2standard | 244 | Takenori, Ohsaki (1518) | Lost 0-2 | -181468 |
| 3standard | 1348 | Tanaka, Kazuhiko (1486) | Lost 1-2 | -171451 |
| 4standard | 1355 | Kawaramoto, Yuya (1464) | Lost 1-2 | -181433 |
| 5standard | 1521 | Yoshimura, Koutarou (1431) | Lost 0-2 | -181415 |
| top | average opponent: 1480record: 1-4 | new rating: 1415 | ||
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 644 | Ohtsu, Minami (1424) | Won 2-1 | +171517 |
| 2standard | 286 | Masuda, Nobuhiko (1516) | Lost 1-2 | -181499 |
| 3standard | 674 | Takuya, Monoe (1515) | Lost 1-2 | -181481 |
| 4standard | 861 | Shiota, Fumihiko (1718) | Lost 1-2 | -141467 |
| top | average opponent: 1543record: 1-3 | new rating: 1467 | ||