Oshima, Keisuke
Current rating: 1738 (#4421)
Record: 53-41
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1703 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 34 | Matsuyama, Akira (1519) | Won 2-0 | +151718 |
| 3standard | 292 | Yashiro, Kazuki (1790) | Won 2-0 | +191737 |
| 4standard | 97 | Nishiyama, Takashi (1474) | Won 2-0 | +141751 |
| 5standard | 16 | Nagai, Mamoru (1896) | Lost 0-2 | -161735 |
| 6standard | 232 | Uramoto, Leo (1540) | Won 2-0 | +151750 |
| 7standard | 36 | Matsumura, Toshikazu (1697) | Won 2-1 | +171767 |
| 8standard | 44 | Takahashi, Ryo 8120 (1679) | Lost 1-2 | -201747 |
| 9standard | 167 | Asano, Kurenai (1654) | Won 2-1 | +171764 |
| 10standard | 106 | Wakizaka, Hironari (1688) | Won 2-0 | +161780 |
| 11standard | 51 | Hirayama, Rei (1563) | Lost 0-2 | -221758 |
| 12standard | 57 | Saito, Yuki (1632) | Lost 1-2 | -201738 |
| top | average opponent: 1648record: 7-4 | new rating: 1738 | ||
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1655 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 47 | Nishimoto, Takuya (1599) | Won 2-1 | +171672 |
| 3sealed | 306 | Natsume, Takuya (1779) | Won 2-1 | +201692 |
| 4sealed | 9 | Dadyko, Alexander (1608) | Lost 0-2 | -201672 |
| 5sealed | 353 | Lee, Soojong (1685) | Won 2-1 | +181690 |
| 6sealed | 316 | Nakajima, Chikara (1758) | Won 2-1 | +201710 |
| 7sealed | 181 | Ueki, Yoshinori (1637) | Won 2-1 | +161726 |
| 8sealed | 43 | Arai, Yusuke (1799) | Lost 1-2 | -161710 |
| 9sealed | 176 | Kiriake, Sho (1588) | Lost 1-2 | -211689 |
| 10draft | 134 | Sekine, Yoshinori (1623) | Lost 1-2 | -191670 |
| 12draft | 190 | Nagao, Yasutaka (1782) | Won 2-1 | +201690 |
| 13draft | 89 | Ueyama, Yuji (1597) | Won 2-0 | +161706 |
| 14draft | 74 | Sinkis, Peter (1649) | Lost 0-2 | -191687 |
| 15draft | 64 | Sumiyoshi, Hiroaki (1571) | Won 2-0 | +161703 |
| top | average opponent: 1667record: 8-5 | new rating: 1703 | ||
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1551 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 543 | Honjo, Kiyotaka (1246) | Lost 0-2 | -231528 |
| 2standard | 587 | Yoshihara, Kenta (1465) | Won 2-0 | +171545 |
| 3standard | 583 | Yamada, Mitsuhiro (1490) | Won 2-0 | +171562 |
| 4standard | 349 | Xu, Shiwei (1660) | Won 2-0 | +191581 |
| 5standard | 193 | Honma, Yuui (1524) | Won 2-1 | +171598 |
| 6standard | 232 | Sato, Yusei (1779) | Won 2-1 | +221620 |
| 7standard | 157 | Mine, Masahiro (1910) | Won 2-0 | +231643 |
| 8standard | 92 | Zhang, Tianlang (1577) | Won 2-1 | +171660 |
| 9standard | 50 | Takahashi, Kei (1672) | Won 2-1 | +181678 |
| 10standard | 16 | Morofuji, Takuma (2110) | Lost 0-2 | -111667 |
| 11standard | 34 | Watanabe, Yuuya (1947) | Lost 0-2 | -131654 |
| 12standard | 95 | Hasebe, Sho (1594) | Won 2-1 | +171671 |
| 13standard | 71 | Zhi, Yimin (1972) | Lost 1-2 | -131658 |
| 14standard | 101 | Furusho, Kotaro (1544) | Won 2-0 | +161674 |
| 15standard | 71 | Yamada, Yosuke9422 (1586) | Lost 0-2 | -191655 |
| top | average opponent: 1672record: 10-5 | new rating: 1655 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1614 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 196 | Inaoka, Yuuta (1448) | Lost 1-2 | -211593 |
| 2standard | 729 | Takahashi, Koji (1397) | Lost 1-2 | -221571 |
| 3standard | 1107 | Miyazaki, Hikaru (1441) | Lost 1-2 | -201551 |
| top | average opponent: 1428record: 0-3 | new rating: 1551 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1633 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 305 | Mimura, Yukihiro (1437) | Won 2-1 | +151648 |
| 2sealed | 282 | Goto, Yoshimasa (1447) | Lost 0-2 | -221626 |
| 3sealed | 973 | Hiroi, Yuta (1471) | Lost 1-2 | -211605 |
| 4sealed | 808 | Nakayama, Kenichi (1488) | Won 2-1 | +161621 |
| 5sealed | 550 | Takiguchi, Itsuki (1396) | Won 2-0 | +141635 |
| 6sealed | 447 | Omura, Hajime (1463) | Lost 1-2 | -211614 |
| top | average opponent: 1450record: 3-3 | new rating: 1614 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1644 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 296 | Yasutomi, Hiroto (1856) | Won 2-0 | +211665 |
| 3sealed | 337 | Murata, Shunya (1481) | Lost 1-2 | -211644 |
| 4sealed | 513 | Furujou, Takashi (1332) | Won 2-0 | +131657 |
| 5sealed | 456 | Takeshita, Toru (1714) | Lost 1-2 | -171640 |
| 6sealed | 707 | Fujioka, Ryota (1615) | Lost 0-2 | -191621 |
| 7sealed | 568 | Morita, Kazuki (1452) | Won 2-1 | +151636 |
| 8sealed | 652 | Wada, Yusuke (1494) | Won 2-1 | +151651 |
| 9sealed | 414 | Niwa, Toshiharu (1547) | Won 2-0 | +171668 |
| 10draft | 83 | Koh, Kai Che (1641) | Lost 1-2 | -191649 |
| 11draft | 81 | Hirayama, Hideyuki (1612) | Lost 0-2 | -191630 |
| 12draft | 80 | Petre, Evan (1886) | Won 2-1 | +231653 |
| 13draft | 218 | Kondo, Masahiro (1557) | Lost 0-2 | -201633 |
| top | average opponent: 1599record: 6-6 | new rating: 1633 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1486 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 205 | Takayama, Kiichiro (1517) | Won 2-0 | +191505 |
| 4modern | 184 | Haratake, Noriyuki (1460) | Won 2-0 | +171522 |
| 5modern | 34 | Yasuda, Masayuki (1889) | Won 2-1 | +241546 |
| 6modern | 79 | Higashida, Taketo (1479) | Lost 0-2 | -191527 |
| 7modern | 94 | Kondo, Shohei (1569) | Won 2-1 | +191546 |
| 8modern | 111 | Muramatsu, Yusuke (1678) | Won 2-0 | +201566 |
| 9modern | 31 | Huang, Hao-Shan (2014) | Won 2-1 | +261592 |
| 10modern | 21 | Omuta, Shoya (1513) | Won 2-1 | +161608 |
| 11modern | 10 | Miyake, Kyohei (2043) | Lost 1-2 | -101598 |
| 12modern | 57 | Wada, Yuki (1877) | Won 2-0 | +231621 |
| 13modern | 30 | Basallo III, Ricardo (1611) | Won 2-0 | +181639 |
| 14modern | 18 | Lee, Anthony (1935) | Lost 0-2 | -131626 |
| 15modern | 23 | Murakami, Akinori (1608) | Won 2-1 | +181644 |
| top | average opponent: 1707record: 10-3 | new rating: 1644 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1443 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 160 | Tomita, Kei (1595) | Won 2-0 | +211464 |
| 4standard | 77 | Ishimura, Shintaro (2094) | Lost 0-2 | -81456 |
| 5standard | 494 | Nishimura, Koichi (1486) | Won 2-1 | +191475 |
| 6standard | 329 | Yoshikawa, Yuuki (1560) | Won 2-1 | +191494 |
| 7standard | 122 | Abe, Yuji7822 (1568) | Won 2-1 | +201514 |
| 8standard | 135 | Nagai, Mamoru (1705) | Won 2-0 | +211535 |
| 9standard | 31 | Oomori, Yasutomo (1664) | Lost 0-2 | -151520 |
| 10standard | 119 | Nakashima, Takumi (1499) | Lost 0-2 | -191501 |
| 11standard | 130 | Kumagai, Riku (2086) | Lost 1-2 | -81493 |
| 12standard | 294 | Tanaka, Akira (1737) | Lost 0-2 | -141479 |
| 13standard | 277 | Murase, Hiroshi (1773) | Won 2-1 | +231502 |
| 14standard | 247 | Shimazu, Yoshiki (1596) | Lost 0-2 | -161486 |
| top | average opponent: 1697record: 6-6 | new rating: 1486 | ||
| Grand Prix Chiba 2016 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 701 | Saito, Ikuru (1500) | Won 2-0 | +181518 |
| 2legacy | 463 | Oodan, Takeshi (1662) | Lost 0-2 | -151503 |
| 3legacy | 985 | Iiba, Kozo (1468) | Won 2-1 | +171520 |
| 4legacy | 506 | Kuriya, Shono (1524) | Won 2-0 | +181538 |
| 5legacy | 508 | Takahashi, Masakazu (1535) | Lost 1-2 | -181520 |
| 6legacy | 594 | Kusunoki, Yuu (1517) | Lost 1-2 | -181502 |
| 7legacy | 694 | Okubo, Mai (1442) | Lost 1-2 | -191483 |
| 8legacy | 746 | Choi, Young-Il (1359) | Lost 0-2 | -201463 |
| 9legacy | 723 | Ueki, Junichi (1402) | Lost 0-2 | -201443 |
| top | average opponent: 1490record: 3-6 | new rating: 1443 | ||