Okajima, Masahiro
Current rating: 1649
Record: 73-58-1
Grand Prix Kobe 2009Grand Prix Yokohama 2010Grand Prix Kobe 2012Grand Prix Yokohama 2012Grand Prix Nagoya 2012Grand Prix Kobe 2014Grand Prix Kyoto 2015Grand Prix Chiba 2015Grand Prix Chiba 2016Grand Prix Shizuoka 2017Grand Prix Kobe 2017Grand Prix Chiba 2018Grand Prix Shizuoka 2018 (standard)Grand Prix Yokohama 2019Grand Prix Nagoya 2020
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1606 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 411 | Zaizen, Kengo (1530) | Won 2-0 | +171623 |
| 2pioneer | 312 | Do, Gihong (1475) | Won 2-0 | +151638 |
| 3pioneer | 178 | Hiroi, Yuta (1406) | Won 2-0 | +141652 |
| 4pioneer | 152 | Miyasaka, Sho (1645) | Won 2-0 | +181670 |
| 5pioneer | 13 | Mayama, Syouta (1565) | Won 2-0 | +161686 |
| 6pioneer | 4 | Nishimoto, Takuya (1611) | Won 2-0 | +161702 |
| 7pioneer | 21 | Han, Yi (1743) | Lost 1-2 | -171685 |
| 8pioneer | 45 | Kusunoki, Iori (1541) | Won 2-0 | +161701 |
| 9pioneer | 24 | Takata, Kouhei (1678) | Won 2-1 | +171718 |
| 10pioneer | 18 | Takada, Hiroki (1740) | Won 2-1 | +191737 |
| 11pioneer | 3 | Hattori, Taiki (1637) | Lost 0-2 | -201717 |
| 12pioneer | 39 | Schiber, Christopher (1852) | Lost 1-2 | -161701 |
| 13pioneer | 36 | Hiromasa, Ryuusuke (1750) | Lost 1-2 | -171684 |
| 14pioneer | 84 | Muramatsu, Yoshiyuki (1619) | Lost 1-2 | -191665 |
| 15pioneer | 82 | Nose, Shunsuke (1764) | Lost 1-2 | -161649 |
| top | average opponent: 1637record: 9-6 | new rating: 1649 | ||
| Grand Prix Yokohama 2019 (modern) | starting rating: 1560 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 306 | Azuma, Kentaro (1500) | Won 2-1 | +171577 |
| 2modern | 211 | Tomioka, Teppei (1517) | Won 2-0 | +171594 |
| 3modern | 161 | Mitui, Kenichiro (1581) | Won 2-1 | +181612 |
| 4modern | 21 | Kawasaki, Takeshi (1492) | Lost 1-2 | -201592 |
| 5modern | 394 | Hamaguchi, Shoji (1559) | Lost 1-2 | -191573 |
| 6modern | 713 | Hattori, Taiki (1513) | Won 2-0 | +171590 |
| 7modern | 275 | Yasufuku, Akihiro (1478) | Won 2-1 | +161606 |
| 8modern | 311 | Nakayama, Satomi (1463) | Won 2-1 | +151621 |
| 9modern | 148 | Kometani, Yuki (1686) | Lost 0-2 | -161605 |
| 10modern | 225 | Takahashi, Masato 3726 (1514) | Lost 1-2 | -201585 |
| 11modern | 192 | Nakamura, Yusuke9902 (1756) | Won 2-1 | +211606 |
| 12modern | 197 | Na, Jongwon (1699) | Lost 0-2 | -161590 |
| 13modern | 189 | Muneishi, Hideaki (1494) | Won 2-0 | +161606 |
| top | average opponent: 1558record: 8-5 | new rating: 1606 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1613 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 747 | Masuda, Rintarou (1384) | Won 2-0 | +141627 |
| 2standard | 248 | Oooka, Daiji (1505) | Lost 0-2 | -211606 |
| 3standard | 766 | Sakamoto, Kazuma (1470) | Lost 1-2 | -201586 |
| 4standard | 999 | Masumoto, Kazuhiro (1539) | Won 2-0 | +171603 |
| 5standard | 789 | Kobayashi, Yuuki 9574 (1570) | Won 2-0 | +181621 |
| 6standard | 545 | Koike, Junya (1436) | Lost 1-2 | -221599 |
| 7standard | 716 | Tukui, Tomoki (1493) | Lost 1-2 | -201579 |
| 8standard | 688 | Naoi, Shingo (1532) | Lost 0-2 | -191560 |
| top | average opponent: 1491record: 3-5 | new rating: 1560 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1625 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 126 | Fukuoka, Soichiro (1494) | Won 2-1 | +151640 |
| 2sealed | 82 | Ozawa, Tomohiko (1432) | Lost 1-2 | -211619 |
| 3sealed | 776 | Yoshida, Goh (1457) | Won 2-1 | +151634 |
| 4sealed | 407 | Loi, Bennet (1554) | Lost 0-2 | -201614 |
| 5sealed | 641 | Uchida, Yuki (1506) | Won 2-1 | +161630 |
| 6sealed | 351 | Moriya, Daisuke (1662) | Lost 0-2 | -171613 |
| top | average opponent: 1517record: 3-3 | new rating: 1613 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1622 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 490 | Nishikawa, Suguru (1504) | Won 2-1 | +151637 |
| 2modern | 578 | Morioka, Ryota (1507) | Won 2-0 | +161653 |
| 3modern | 375 | Kawasoe, Shintaro (1482) | Lost 1-2 | -211632 |
| 4modern | 560 | Odo, Hiroyuki (1601) | Won 2-0 | +171649 |
| 5modern | 447 | Hirako, Yuki (1539) | Lost 0-2 | -201629 |
| 6modern | 594 | Kihira, Tomoya (1490) | Lost 1-2 | -201609 |
| 7modern | 732 | Wada, Kouji (1504) | Won 2-1 | +161625 |
| 8modern | 589 | Oonishi, Tatsuya (1538) | Won 2-1 | +161641 |
| 9modern | 482 | Kobayashi, Kazutaka (1715) | Lost 1-2 | -161625 |
| top | average opponent: 1542record: 5-4 | new rating: 1625 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1659 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 393 | Izumiya, Ryo (1500) | Won 2-0 | +151674 |
| 2standard | 466 | Minoshima, Daijiro (1483) | Lost 1-2 | -221652 |
| 3standard | 989 | Yamamura, Naoki (1577) | Lost 1-2 | -191633 |
| 4standard | 984 | Hirooka, Toshiki (1481) | Won 2-1 | +151648 |
| 5standard | 702 | Ooshima, Kunihiro (1497) | Lost 1-2 | -201628 |
| 6standard | 1036 | Araki, Youhei (1359) | Won 2-1 | +131641 |
| 7standard | 833 | Yamaguchi, Tetsuya (1569) | Lost 1-2 | -191622 |
| top | average opponent: 1495record: 3-4 | new rating: 1622 | ||
| Grand Prix Chiba 2016 (legacy) | starting rating: 1582 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 218 | Iwama, Kento (1500) | Lost 1-2 | -201562 |
| 2legacy | 608 | Hamada, Junji (1563) | Lost 1-2 | -181544 |
| 3legacy | 1039 | Tanabe, Masatoshi (1465) | Won 2-1 | +171561 |
| 4legacy | 842 | Takeuchi, Hayato (1481) | Won 2-0 | +161577 |
| 5legacy | 783 | Amano, Tatsuya (1498) | Won 2-0 | +171594 |
| 6legacy | 510 | Hangyo, Tatsuya (1507) | Won 2-1 | +161610 |
| 7legacy | 298 | Shun, Aoki (1538) | Won 2-1 | +171627 |
| 8legacy | 244 | Watanabe, Ryouta2795 (1685) | Won 2-0 | +191646 |
| 9legacy | 97 | Ishihara, Atsushi (1553) | Won 2-0 | +161662 |
| 10legacy | 99 | Ebihara, Hirotaka (1677) | Lost 1-2 | -171645 |
| 11legacy | 211 | Murakami, Kazuya3837 (1703) | Lost 0-2 | -171628 |
| 12legacy | 205 | Okawa, Hiroshi (1534) | Won 2-1 | +161644 |
| 13legacy | 157 | Suzuki, Kousei (1560) | Won 2-1 | +161660 |
| 14legacy | 111 | Yamane, Masahiro (1565) | Won 2-1 | +171677 |
| 15legacy | 118 | Sunohara, Motoki (1683) | Lost 0-2 | -181659 |
| top | average opponent: 1567record: 10-5 | new rating: 1659 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1572 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 232 | Syuto, Yuji (1500) | Lost 1-2 | -191553 |
| 2sealed | 413 | Yamagishi, Kenta (1492) | Won 2-0 | +171570 |
| 3sealed | 447 | Aranami, Naoto (1437) | Won 2-0 | +151585 |
| 4sealed | 255 | Miyasita, Naoyuki (1618) | Lost 0-2 | -171568 |
| 5sealed | 345 | Imai, Yuutarou (1501) | Won 2-0 | +171585 |
| 6sealed | 327 | Tsuchida, Hiromitsu (1489) | Won 2-0 | +161601 |
| 7sealed | 132 | Inoue, Hiroyuki0875 (1537) | Lost 1-2 | -191582 |
| top | average opponent: 1510record: 4-3 | new rating: 1582 | ||
| Grand Prix Kyoto 2015 (legacy) | starting rating: 1540 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 739 | Tamano, Yuuki (1500) | Won 2-0 | +181558 |
| 2legacy | 644 | Fujino, Masashi (1482) | Lost 1-2 | -201538 |
| 3legacy | 746 | Hayaki, Hirokazu (1502) | Won 2-0 | +181556 |
| 4legacy | 794 | Mizuguchi, Kiyoshi (1483) | Won 2-1 | +161572 |
| 5legacy | 593 | Sato, Tatsuo (1474) | Won 2-0 | +161588 |
| 6legacy | 593 | Minamitani, Daichi (1626) | Lost 1-2 | -171571 |
| 7legacy | 691 | Hattori, Kazuki (1675) | Lost 0-2 | -161555 |
| 8legacy | 702 | Nobori, Ryouta (1500) | Won 2-0 | +171572 |
| top | average opponent: 1530record: 5-3 | new rating: 1572 | ||
| Grand Prix Kobe 2014 (modern) | starting rating: 1526 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 1071 | Mizobuchi, Yuuji (1599) | Lost 1-2 | -161510 |
| 2modern | 1080 | Yanagizawa, Kazutoyo (1349) | Won 2-1 | +151525 |
| 3modern | 1003 | Takato, Toshiyuki (1514) | Lost 1-2 | -181507 |
| 4modern | 1107 | Takahashi, Ryouhei (1478) | Won 2-1 | +171524 |
| 5modern | 1047 | Hata, Yuusuke (1497) | Lost 0-2 | -181506 |
| 6modern | 1070 | Kusunoki, Yuki (1476) | Won 2-1 | +171523 |
| 7modern | 986 | Kanekiyo, Ryusuke (1466) | Won 2-0 | +171540 |
| 8modern | 904 | Ootani, Nobuhiro (1522) | Won 2-1 | +181558 |
| 9modern | 853 | Singh, Devsharan (1591) | Lost 1-2 | -181540 |
| top | average opponent: 1499record: 5-4 | new rating: 1540 | ||
| Grand Prix Nagoya 2012 (RTR standard) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 124 | Tanehashi, Shigeharu (1450) | Won 2-0 | +171535 |
| 2standard | 72 | Mizuta, Youhei (1516) | Won 2-1 | +181553 |
| 3standard | 242 | Saitou, Kazuyuki (1535) | Lost 0-2 | -181535 |
| 4standard | 514 | Hirose, Daichi (1380) | Won 2-1 | +151550 |
| 5standard | 303 | Kurihara, Tomo (1488) | Lost 1-2 | -191531 |
| 6standard | 326 | Nakaoka, Koshiro (1417) | Lost 1-2 | -201511 |
| 7standard | 451 | Oomine, Masamichi (1503) | Won 2-1 | +171528 |
| 8standard | 274 | Tasaki, Yasuhiro (1499) | Won 2-0 | +181546 |
| 9standard | 227 | Uehara, Jin (1467) | Lost 0-2 | -201526 |
| top | average opponent: 1473record: 5-4 | new rating: 1526 | ||
| Grand Prix Yokohama 2012 (modern) | starting rating: 1503 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 331 | Miura, Kunio (1500) | Won 2-1 | +181521 |
| 2modern | 91 | Takeuchi, Hidehito (1185) | Lost 0-2 | -241497 |
| 3modern | 295 | Satou, Katsuya (1500) | Won 2-0 | +181515 |
| 4modern | 424 | Kawamura, Kazushi (1777) | Won 2-0 | +221537 |
| 5modern | 273 | Hagiwara, Yuuta (1468) | Lost 0-2 | -191518 |
| 6modern | 318 | Matsumoto, Kazuya (1554) | Won 2-0 | +191537 |
| 7modern | 181 | Shimizu, Haruo (1518) | Lost 0-2 | -191518 |
| top | average opponent: 1500record: 4-3 | new rating: 1518 | ||
| Grand Prix Kobe 2012 (DKA limited) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 102 | Kanegawa, Toshiya (1547) | Lost 0-2 | -171484 |
| 2sealed | 417 | Satou, Kento (1482) | Lost 1-2 | -181466 |
| 3sealed | 484 | Nam, Kyung Hwan (1464) | Won 2-1 | +181484 |
| 4sealed | 439 | Kawashima, Yuki (1549) | Won 2-1 | +191503 |
| 5sealed | 389 | Ooshima, Kazuyasu (1499) | Won 2-0 | +181521 |
| 6sealed | 312 | Nakamura, Fumihiko (1505) | Lost 0-2 | -181503 |
| top | average opponent: 1508record: 3-3 | new rating: 1503 | ||
| Grand Prix Yokohama 2010 (extended) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 331 | Kondo, Hirotsugu (1500) | Lost 1-2 | -181483 |
| 2extended | 351 | Sunakawa, Yasuhiro (1481) | Draw 1-1 | 01483 |
| 3extended | 394 | Narita, Takamitsu (1478) | Won 2-1 | +181501 |
| 4extended | 326 | Tanaka, Yousuke (Tokyo (1499) | Won 2-1 | +181519 |
| 5extended | 232 | Shimada, Hiroya (1567) | Lost 0-2 | -171502 |
| 6extended | 299 | Tanbo, Yoshiki (1449) | Won 2-0 | +171519 |
| 7extended | 214 | Satou, Shinnosuke (1517) | Lost 1-2 | -181501 |
| top | average opponent: 1499record: 3-3-1 | new rating: 1501 | ||
| Grand Prix Kobe 2009 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 142 | Nakayama, Yuuki (1500) | Won 2-1 | +181518 |
| 2extended | 9 | Matsuda, Yuuki (1606) | Lost 0-2 | -161502 |
| 3extended | 150 | Yamaguchi, Yu (1499) | Won 2-1 | +181520 |
| 4extended | 168 | Baba, Yasunori (1575) | Lost 1-2 | -171503 |
| 5extended | 178 | Takeno, Shinichi (1518) | Won 2-1 | +181521 |
| 6extended | 111 | Kozakai, Yukio (1436) | Lost 1-2 | -201501 |
| top | average opponent: 1522record: 3-3 | new rating: 1501 | ||