Kojima, Yoshifumi
Current rating: 1748 (#3960)
Record: 82-71-3
- 2012
- 2013
- 2015
- 2016
- 2017
- 2018
- 2019
- 2020
- 2023
| Regional Championships Yokohama 2023 (ONE standard) | starting rating: 1728 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 34 | Yoon, SooHan (1619) | Won 2-1 | +161744 |
| 2standard | 33 | Miura, Ryuji (1860) | Won 2-0 | +201764 |
| 3standard | 4 | Kuroda, Masashiro (1849) | Won 2-1 | +201784 |
| 4standard | 7 | Moriyama, Masahide (1940) | Lost 0-2 | -151769 |
| 5standard | 26 | Kobayasi, Tomoya (1826) | Lost 0-2 | -171752 |
| 6standard | 22 | Nakashima, Atsushi (1787) | Lost 1-2 | -181734 |
| 7standard | 49 | Obara, Yuichiro (1508) | Won 2-0 | +141748 |
| top | average opponent: 1770record: 4-3 | new rating: 1748 | ||
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1752 | |||
| round | table | opponent (rating) | result | Δrating |
| 3pioneer | 326 | Iwasawa, Fumiya (1738) | Won 2-1 | +181770 |
| 4pioneer | 99 | Nagai, Mamoru (1819) | Lost 1-2 | -181752 |
| 5pioneer | 218 | Makino, Hiroyuki (1737) | Lost 0-2 | -181734 |
| 6pioneer | 422 | Sasaki, Tsutomu (1621) | Won 2-1 | +161750 |
| 7pioneer | 185 | Mayama, Syouta (1534) | Lost 0-2 | -221728 |
| top | average opponent: 1690record: 2-3 | new rating: 1728 | ||
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1702 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 38 | Ohkura, Ryota (1608) | Won 2-1 | +161718 |
| 4standard | 35 | Planter Fernandez, Carlos (1717) | Won 2-1 | +181736 |
| 5standard | 27 | Moriya, Erika (1625) | Lost 0-2 | -201716 |
| 6standard | 183 | Takahashi, Kei (1619) | Won 2-0 | +171733 |
| 7standard | 117 | Suzuki, Shota 9888 (1509) | Won 2-1 | +141747 |
| 8standard | 71 | Ding, Yi (1768) | Won 2-1 | +181765 |
| 9standard | 46 | Saito, Toru (1713) | Lost 0-2 | -191746 |
| 10standard | 44 | Iijima, Shin (1474) | Won 2-1 | +131759 |
| 11standard | 66 | Hamada, Yuusai (1577) | Lost 0-2 | -211738 |
| 12standard | 96 | Moriya, Daisuke (1643) | Won 2-1 | +161754 |
| 13standard | 57 | Ohkawa, Yusuke (1701) | Won 2-1 | +171771 |
| 14standard | 29 | Kimura, Shigeki (1698) | Lost 1-2 | -191752 |
| 15standard | 44 | Kudo, Koichi (1683) | ID | 01752 |
| top | average opponent: 1641record: 8-4-1 | new rating: 1752 | ||
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1574 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 133 | Inoue, Akira (1489) | Won 2-0 | +161590 |
| 4sealed | 26 | Taki, Masaya (1321) | Won 2-0 | +131603 |
| 5sealed | 94 | Uchino, Jun (1651) | Won 2-1 | +191622 |
| 6sealed | 52 | Nakamura, Yusuke9902 (1790) | Won 2-0 | +211643 |
| 7sealed | 4 | Nakashima, Atsushi (2045) | Won 2-0 | +251668 |
| 8sealed | 6 | Terasawa, Kazuya (1900) | Won 2-0 | +221690 |
| 9sealed | 7 | Ohkawa, Yusuke (1680) | Won 2-0 | +181708 |
| 10draft | 197 | Kashima, Akihiro (1820) | Won 2-1 | +201728 |
| 11draft | 166 | Han, Bing (2045) | Lost 1-2 | -121716 |
| 12draft | 206 | Suzuki, Ryo 4084 (1633) | Won 2-1 | +161732 |
| 13draft | 54 | Nakamichi, Daisuke (1888) | Lost 0-2 | -151717 |
| 14draft | 143 | Ishikawa, Masahide (1889) | Lost 0-2 | -151702 |
| 15draft | 70 | Tanji, Kensuke (1834) | ID | 01702 |
| top | average opponent: 1768record: 9-3-1 | new rating: 1702 | ||
| Grand Prix Taipei 2019 (WAR standard) | starting rating: 1574 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 248 | Ma, Yiyuan (1634) | Lost 0-2 | -171557 |
| 4standard | 346 | See, Spencer (1474) | Won 2-0 | +171574 |
| 5standard | 115 | Matsushita, Takashi (1748) | Lost 0-2 | -151559 |
| 6standard | 172 | Zhu, Lian (1411) | Won 2-0 | +151574 |
| 7standard | 161 | Jiang, Hongjiu (1562) | Won 2-1 | +181592 |
| 8standard | 124 | Hsu, Chentao (1570) | Lost 0-2 | -181574 |
| top | average opponent: 1566record: 3-3 | new rating: 1574 | ||
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1556 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 460 | Tsukagoshi, Tadaki (1633) | Lost 1-2 | -161540 |
| 4standard | 339 | Itsukushima, Shun (1519) | Lost 1-2 | -191521 |
| 5standard | 651 | Tuboi, Toshiki (1499) | Won 2-0 | +181539 |
| 6standard | 592 | Nakai, Yoshiharu (1524) | Won 2-0 | +181557 |
| 7standard | 303 | Saito, Tomohiro (1588) | Draw 1-1 | 01557 |
| 8standard | 316 | Maeda, Dai (1493) | Won 2-1 | +171574 |
| top | average opponent: 1543record: 3-2-1 | new rating: 1574 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1485 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 503 | Muto, Shogo (1607) | Won 2-1 | +201505 |
| 4standard | 262 | Sakai, Riku (1500) | Won 2-1 | +181523 |
| 5standard | 274 | Yoshida, Kenji (1482) | Won 2-0 | +171540 |
| 6standard | 195 | Hirayama, Rei (1568) | Won 2-1 | +191559 |
| 7standard | 195 | Kokubu, Yusuke (1678) | Lost 0-2 | -161543 |
| 8standard | 271 | Yamagata, Hiroki (1576) | Lost 1-2 | -181525 |
| 9standard | 93 | Yamane, Naoto (1586) | Lost 1-2 | -161509 |
| 10standard | 176 | Nakamura, Yusuke9902 (1702) | Won 2-0 | +211530 |
| 11standard | 91 | Seki, Keita (1766) | Won 2-0 | +221552 |
| 12standard | 49 | Harada, Yugo (1636) | Won 2-0 | +201572 |
| 13standard | 49 | Hamada, Akira (1668) | Lost 1-2 | -161556 |
| 14standard | 98 | Inagaki, Yukihiro (1559) | Lost 1-2 | -181538 |
| 15standard | 96 | Kobayashi, Chiaki (1584) | Won 2-0 | +181556 |
| top | average opponent: 1608record: 8-5 | new rating: 1556 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1477 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 278 | Obata, Ken (1551) | Lost 1-2 | -161461 |
| 4sealed | 702 | Watanabe, Yuta 8061 (1482) | Lost 1-2 | -181443 |
| 5sealed | 544 | Tahara, Ippei (1541) | Won 2-0 | +201463 |
| 6sealed | 499 | Demura, Mitsuhiro (1404) | Won 2-0 | +171480 |
| 7sealed | 459 | Aoki, Shougo (1719) | Lost 1-2 | -141466 |
| 8sealed | 489 | Suzuki, Yuga (1516) | Won 2-0 | +191485 |
| top | average opponent: 1536record: 3-3 | new rating: 1485 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1547 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 338 | Ohnishi, Jyunpei (1737) | Lost 1-2 | -141533 |
| 4sealed | 766 | Oohusa, Ryohei (1496) | Lost 1-2 | -191514 |
| 5sealed | 734 | Kuroiwa, Hiroki (1484) | Lost 1-2 | -191495 |
| 6sealed | 796 | Toma, Shinya (1482) | Lost 0-2 | -181477 |
| top | average opponent: 1550record: 0-4 | new rating: 1477 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1587 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 593 | Kida, Masashi (1490) | Lost 1-2 | -201567 |
| 4modern | 739 | Yu, Yin (1686) | Won 2-0 | +201587 |
| 5modern | 557 | Kaniwa, Yuki (1526) | Lost 1-2 | -191568 |
| 6modern | 510 | Hozuki, Atsushi (1428) | Won 2-1 | +151583 |
| 7modern | 323 | Harada, Daisaku (1522) | Lost 0-2 | -191564 |
| 8modern | 682 | Oguri, Kouhei (1619) | Lost 1-2 | -171547 |
| top | average opponent: 1545record: 2-4 | new rating: 1547 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1605 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 368 | Imazawa, Junpei (1511) | Won 2-0 | +171622 |
| 4standard | 66 | Wang, Guanyi (1630) | Lost 1-2 | -181604 |
| 5standard | 546 | Ishihara, Takashi (1483) | Won 2-1 | +161620 |
| 6standard | 198 | Ninomiya, Souta (1684) | Won 2-1 | +191639 |
| 7standard | 97 | Yaocheng, Mark (1728) | Won 2-1 | +191658 |
| 8standard | 28 | Kudou, Takunori (1655) | Lost 0-2 | -181640 |
| 9standard | 186 | Tachibana, Kentarou (1616) | Lost 1-2 | -181622 |
| 10standard | 401 | Li, Youchen (1571) | Lost 1-2 | -191603 |
| 11standard | 372 | Sano, Kunihide (1695) | Lost 0-2 | -161587 |
| top | average opponent: 1619record: 4-5 | new rating: 1587 | ||
| Grand Prix Taipei 2016 (SOI standard) | starting rating: 1620 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 159 | Chen, Wedman (1586) | Won 2-0 | +171637 |
| 4standard | 2 | Ng, Meng Cheong (1656) | Won 2-1 | +181655 |
| 5standard | 52 | Rogers, Matthew (1931) | Lost 0-2 | -131642 |
| 6standard | 58 | Lin, Shang-Wei (1538) | Lost 1-2 | -201622 |
| 7standard | 120 | Kuroda, Masashiro (1859) | Won 2-1 | +231645 |
| 8standard | 74 | Tedori, Kota (1582) | Lost 0-2 | -201625 |
| 9standard | 107 | Kobayashi, Kazutaka (1506) | Lost 0-2 | -201605 |
| top | average opponent: 1666record: 3-4 | new rating: 1605 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1530 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 530 | Miyajima, Takuto (1478) | Won 2-0 | +171547 |
| 3standard | 28 | Ookura, Haruka (1608) | Won 2-0 | +191566 |
| 4standard | 2 | Hara, Yusuke (1735) | Draw 1-1 | +31569 |
| 5standard | 175 | Tinen, Kousuke (1587) | Lost 0-2 | -171552 |
| 6standard | 439 | Kositaporn, Nonthakorn (1587) | Won 2-1 | +181570 |
| 7standard | 275 | Kageura, Taisuke (1520) | Lost 1-2 | -181552 |
| 8standard | 493 | Masashi, Shirai (1537) | Won 2-0 | +171569 |
| 9standard | 313 | Higashida, Tetsuaki (1592) | Won 2-0 | +191588 |
| 10standard | 194 | Fujiwara, Takahito (1544) | Won 2-0 | +171605 |
| 11standard | 126 | Ookata, Akihiro 1695 (1583) | Won 2-0 | +171622 |
| 12standard | 76 | Yamaguchi, Satoru (1608) | Lost 0-2 | -181604 |
| 13standard | 167 | Matsubara, Yuusuke (1652) | Won 2-0 | +191623 |
| 14standard | 103 | Itou, Makoto (1511) | Won 2-0 | +161639 |
| 15standard | 68 | Otahara, Sho (1562) | Lost 1-2 | -191620 |
| top | average opponent: 1579record: 9-4-1 | new rating: 1620 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1514 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 564 | Kondo, Masahiro (1515) | Won 2-0 | +181532 |
| 2sealed | 503 | Katou, Shinpei (1501) | Won 2-0 | +181550 |
| 3sealed | 116 | Ma, Kun (1554) | Won 2-0 | +181568 |
| 4sealed | 154 | Satou, Fumihiko (1393) | Won 2-1 | +151583 |
| 5sealed | 120 | Kainuma, Satoru (1626) | Lost 1-2 | -181565 |
| 6sealed | 246 | Sasaoka, Hirohito (1473) | Won 2-0 | +171582 |
| 7sealed | 53 | Oono, Seita (1589) | Lost 0-2 | -181564 |
| 8sealed | 248 | Fujimoto, Takehiro (1900) | Lost 0-2 | -121552 |
| 9sealed | 383 | Yanagizawa, Kazutoyo (1360) | Lost 1-2 | -221530 |
| top | average opponent: 1546record: 5-4 | new rating: 1530 | ||
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 101 | Satou, Takayuki (1500) | Draw 1-1 | 01500 |
| 2standard | 567 | Nishimura, Hajime (1504) | Won 2-0 | +181518 |
| 3standard | 576 | Tasugi, Keigo (1465) | Won 2-0 | +171535 |
| 4standard | 293 | Kawamura, Naoki (1409) | Won 2-1 | +151550 |
| 5standard | 159 | Kitou, Kentarou (1527) | Lost 0-2 | -181532 |
| 6standard | 345 | Nishikawa, Ryota (1540) | Lost 0-2 | -181514 |
| top | average opponent: 1491record: 3-2-1 | new rating: 1514 | ||
| Grand Prix Shizuoka 2013 (THS standard) | starting rating: 1524 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 138 | Liang, Chihwei (1553) | Won 2-0 | +181542 |
| 4standard | 32 | Murata, Toshiaki (1745) | Lost 0-2 | -141528 |
| 5standard | 178 | Iyanaga, Junya (1799) | Lost 1-2 | -131515 |
| 6standard | 232 | Kato, Kensuke (1673) | Lost 0-2 | -151500 |
| top | average opponent: 1693record: 1-3 | new rating: 1500 | ||
| Grand Prix Kitakyushu 2013 (M14 standard) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 98 | Ishihara, Jun (1689) | Won 2-1 | +211522 |
| 4standard | 114 | Umemoto, Ryouta (1465) | Lost 0-2 | -191503 |
| 5standard | 232 | Ohkawa, Shinpei (1541) | Won 2-0 | +191522 |
| 6standard | 113 | Kanou, Yuuki (1531) | Lost 1-2 | -181504 |
| 7standard | 136 | Yoshidomi, Shuuji (1490) | Won 2-1 | +181522 |
| 8standard | 111 | Ishikawa, Seiji (1515) | Lost 1-2 | -181504 |
| 9standard | 157 | Yasufuku, Akihiro (1617) | Won 2-1 | +201524 |
| top | average opponent: 1549record: 4-3 | new rating: 1524 | ||
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1508 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 746 | Yamano, Tatsuto (1270) | Won 2-1 | +141522 |
| 4sealed | 776 | Senoo, Yuto (1553) | Won 2-1 | +181540 |
| 5sealed | 688 | Tanaka, Akira (1677) | Won 2-0 | +211561 |
| 6sealed | 658 | Matsumoto, Takeshi (1573) | Lost 1-2 | -181543 |
| 7sealed | 730 | Watanabe, Kenji (1543) | Won 2-1 | +181561 |
| 8sealed | 858 | Tsukamoto, Masato (1509) | Won 2-1 | +171578 |
| 9sealed | 845 | Kanno, Atsushi (1749) | Lost 0-2 | -151563 |
| 10sealed | 111 | Katayama, Hidenori (1778) | Lost 1-2 | -141549 |
| 11sealed | 103 | Fujimaki, Satoshi (1577) | Won 2-0 | +181567 |
| 12draft | 92 | Emori, Shinichi (1550) | Won 2-0 | +181585 |
| 13draft | 83 | Gao, Tan (1674) | Lost 1-2 | -161569 |
| 14draft | 87 | Konno, Masashi (1689) | Lost 1-2 | -161553 |
| 15draft | 64 | Yanase, Kaname (1595) | Lost 0-2 | -171536 |
| 16draft | 35 | Watanabe, Yasunari (1542) | Lost 1-2 | -181518 |
| 17draft | 71 | Senoo, Yuto (1583) | Lost 1-2 | -171501 |
| top | average opponent: 1591record: 7-8 | new rating: 1501 | ||
| Grand Prix Nagoya 2012 (RTR standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 86 | Akira M., (1518) | Won 2-0 | +181518 |
| 3standard | 261 | Inoue, Shota (1535) | Won 2-1 | +191537 |
| 4standard | 1 | Shinohara, Kazuaki (1385) | Lost 1-2 | -211516 |
| 5standard | 343 | Yukuhiro, Ken (2000) | Lost 0-2 | -101506 |
| 6standard | 318 | xiao, lau (1616) | Won 2-1 | +201526 |
| 7standard | 183 | Nagao, Kengo (1536) | Lost 0-2 | -181508 |
| 8standard | 343 | Ikebata, Ryou (1501) | Lost 0-2 | -181490 |
| 9standard | 323 | Furujou, Takashi (1475) | Won 2-1 | +181508 |
| top | average opponent: 1571record: 4-4 | new rating: 1508 | ||