Okamoto, Ichiro
Current rating: 1591
Record: 53-45-1
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1553 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 56 | Akimoto, Koshi (1475) | Lost 1-2 | -201533 |
| 2standard | 571 | Higashi, Yuusuke (1374) | Won 2-1 | +151548 |
| 3standard | 660 | Kono, Jun (1487) | Won 2-0 | +171565 |
| 4standard | 302 | Yamada, Yasushi (1686) | Won 2-0 | +201585 |
| 5standard | 357 | Matsuzaki, Eiji (1499) | Won 2-0 | +171602 |
| 6standard | 190 | Motomura, Shigeru (1736) | Won 2-0 | +201622 |
| 7standard | 61 | Omiya, Takahiro (1600) | Won 2-1 | +181640 |
| 8standard | 22 | Oikawa, Ryusuke (1663) | Lost 0-2 | -181622 |
| 9standard | 132 | Miyazono, Takeshi (1749) | Lost 1-2 | -161606 |
| 10standard | 139 | Miyabe, Kouichi (1760) | Lost 0-2 | -151591 |
| top | average opponent: 1603record: 6-4 | new rating: 1591 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1582 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 189 | Sato, Sho (1535) | Lost 1-2 | -181564 |
| 4sealed | 493 | Samejima, Ippei (1744) | Won 2-0 | +211585 |
| 5sealed | 183 | Matsushita, Masakazu (1714) | Lost 1-2 | -161569 |
| 6sealed | 495 | Washimi, Kazuo (1645) | Lost 0-2 | -161553 |
| top | average opponent: 1660record: 1-3 | new rating: 1553 | ||
| Grand Prix Singapore 2018 (DOM standard) | starting rating: 1611 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 136 | Zhang, Yuxuan (1746) | Won 2-1 | +211632 |
| 4standard | 7 | Seah, Lip Chee Eric (1595) | Lost 1-2 | -191613 |
| 5standard | 69 | Fujimoto, Takehiro (1883) | Lost 1-2 | -131600 |
| 6standard | 124 | Wong, Kenneth (1629) | Lost 1-2 | -181582 |
| top | average opponent: 1713record: 1-3 | new rating: 1582 | ||
| Grand Prix Hong Kong 2017 (XLN limited) | starting rating: 1629 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 92 | Cho, Yat Ping (1424) | Won 2-0 | +141643 |
| 3sealed | 149 | Oei, Henry (1524) | Won 2-1 | +161659 |
| 4sealed | 29 | Tamada, Ryoichi (1788) | Lost 1-2 | -161643 |
| 5sealed | 144 | Tang, Xavier (1596) | Lost 0-2 | -191624 |
| 6sealed | 167 | Tan, Chin Heng (1873) | Won 2-1 | +231647 |
| 7sealed | 117 | Mao, Dun (1600) | Lost 1-2 | -191628 |
| 8sealed | 170 | Lau, Sam Lei Kang (1697) | Lost 1-2 | -171611 |
| top | average opponent: 1643record: 3-4 | new rating: 1611 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1634 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 214 | Moriya, Jun (1835) | Won 2-0 | +221656 |
| 3sealed | 448 | Zhu, David (1626) | Lost 1-2 | -191637 |
| 4sealed | 617 | Yamada, Masashi (1652) | Won 2-1 | +181655 |
| 5sealed | 481 | Rubin, Steve (2064) | Lost 0-2 | -101645 |
| 6sealed | 442 | Soga, Junya (1550) | Won 2-0 | +161661 |
| 7sealed | 487 | Liu, Yuchen (1917) | Lost 0-2 | -141647 |
| 8sealed | 536 | Asai, Ikuya (1618) | Lost 0-2 | -181629 |
| top | average opponent: 1752record: 3-4 | new rating: 1629 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1670 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 304 | Imaizumi, Riku (1470) | Lost 0-2 | -211649 |
| 2modern | 965 | Komoto, Ryosuke (1482) | Won 2-1 | +151664 |
| 3modern | 1011 | Oka, Nobuaki (1466) | Won 2-0 | +141678 |
| 4modern | 580 | Fukuhara, Yuta (1463) | Draw 1-1 | -41674 |
| 5modern | 651 | Nishihara, Hiroki (1595) | Lost 0-2 | -191655 |
| 6modern | 869 | Ono, Kentaro (1507) | Lost 0-2 | -211634 |
| top | average opponent: 1497record: 2-3-1 | new rating: 1634 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1685 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 9 | Konta, Takumi (1507) | Lost 0-2 | -211664 |
| 2standard | 646 | Yamamoto, Ryousuke (1456) | Lost 0-2 | -221642 |
| 3standard | 1277 | Tamamura, Hideya (1469) | Won 2-0 | +151657 |
| 4standard | 1056 | Yokoi, Takahiro (1479) | Won 2-1 | +151672 |
| 5standard | 729 | Toyohara, Eisuke (1375) | Won 2-0 | +121684 |
| 6standard | 817 | Mitsunaga, Yuki (1462) | Lost 0-2 | -211663 |
| 7standard | 712 | Takeuchi, Shouhei (1573) | Won 2-0 | +161679 |
| 8standard | 671 | Mori, Mizuki (1522) | Won 2-1 | +151694 |
| 9standard | 559 | Ishikawa, Takuma (1365) | Lost 0-2 | -241670 |
| top | average opponent: 1468record: 5-4 | new rating: 1670 | ||
| Grand Prix Kuala Lumpur 2016 (KLD standard) | starting rating: 1715 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 139 | Blaise, Xavier (1500) | Won 2-0 | +151730 |
| 2standard | 603 | Taira, Shunichi (1685) | Lost 0-2 | -191711 |
| 3standard | 235 | Young, San (1540) | Lost 0-0 | -211690 |
| 4standard | 305 | Wahid, Izad (1490) | Won 2-0 | +141704 |
| 5standard | 217 | Takesue, Chikara (1704) | Lost 0-2 | -181686 |
| 6standard | 237 | Mohd Nor, Aiman (1508) | Won 2-1 | +151701 |
| 7standard | 219 | Yusi, Alexander (1514) | Won 2-1 | +141715 |
| 8standard | 167 | Seow, Kelvin (1571) | Won 2-0 | +161731 |
| 9standard | 95 | Wijaya, Christian (1750) | Won 2-1 | +181749 |
| 10standard | 89 | Yap, Jason (1755) | Lost 1-2 | -181731 |
| 11standard | 88 | Garcia, Marlon (1603) | Lost 0-2 | -201711 |
| 12standard | 100 | Boo, Aaron (1500) | Won 2-0 | +141725 |
| 13standard | 82 | Yamagami, Yudai (1686) | Lost 1-2 | -191706 |
| 14standard | 81 | Pang, Zhong Chern (1515) | Lost 0-2 | -211685 |
| top | average opponent: 1594record: 7-7 | new rating: 1685 | ||
| Grand Prix Taipei 2016 (SOI standard) | starting rating: 1636 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 149 | Tseng, Yuchun (1500) | Won 2-1 | +161652 |
| 2standard | 10 | Komachi, Akinori (1527) | Lost 0-2 | -211631 |
| 3standard | 284 | Dai, Zihjie (1504) | Lost 1-2 | -201611 |
| 4standard | 316 | Peng, Zer Shiuan (1481) | Won 2-0 | +161627 |
| 5standard | 229 | Lee, Marcus Bing Sian (1343) | Won 2-0 | +131640 |
| 6standard | 163 | Twu, Allen (1453) | Won 2-0 | +141654 |
| 7standard | 169 | Suzuike, Fumiyasu (1781) | Lost 1-2 | -151639 |
| 8standard | 154 | Kihara, Ryou (1739) | Won 2-1 | +191658 |
| 9standard | 135 | Yamamoto, Kentaro (2064) | Won 2-0 | +251683 |
| 10standard | 71 | Hirami, Tomonori (1873) | Lost 1-2 | -141669 |
| 11standard | 117 | Chua, Cheng Zhi Orange (1514) | Lost 1-2 | -211648 |
| 12standard | 110 | Sasaki, Yusuke (1704) | Won 2-1 | +191667 |
| 13standard | 91 | Chu, Huseh Lan (1564) | Won 2-1 | +161683 |
| 14standard | 79 | Koshimura, Takeshi (1584) | Won 2-1 | +161699 |
| 15standard | 76 | Su, Yu Hao (1592) | Won 2-1 | +161715 |
| top | average opponent: 1615record: 10-5 | new rating: 1715 | ||
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1544 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 402 | Tanaka, Shota (1464) | Won 2-0 | +161560 |
| 2standard | 198 | Itou, Hayato7608 (1575) | Won 2-0 | +181578 |
| 3standard | 265 | Shibata, Toru (1425) | Won 2-1 | +161594 |
| 4standard | 75 | Mutou, Kazuki (1647) | Won 2-1 | +191613 |
| 5standard | 101 | Hamada, Keisuke (1532) | Won 2-1 | +161629 |
| 6standard | 50 | Endo, Natsumi (1494) | Won 2-0 | +161645 |
| 7standard | 23 | Nakamura, Takehiro (1587) | Lost 0-2 | -191626 |
| 8standard | 108 | Tanaka, Eiji (1636) | Won 2-0 | +181644 |
| 9standard | 17 | Yajima, Tatsuaki (1759) | Lost 0-2 | -161628 |
| 10standard | 74 | Tanaka, Shinichi (1621) | Lost 1-2 | -181610 |
| 11standard | 120 | Saito, Tomoharu (2151) | Lost 0-2 | -91601 |
| 12standard | 134 | Hosoda, Daiki (1592) | Won 2-1 | +181619 |
| 13standard | 130 | Saito, Daichi (1536) | Lost 1-2 | -201599 |
| 14standard | 117 | Taniguchi, Hiroaki (1711) | Won 2-0 | +201619 |
| 15standard | 97 | Uehara, Shinya (1561) | Won 2-1 | +171636 |
| top | average opponent: 1619record: 10-5 | new rating: 1636 | ||
| Grand Prix Hiroshima 2011 (ISD standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 1 | Maruo, Yuuta (1516) | Won 2-0 | +181518 |
| 3standard | 63 | Moriya, Daisuke (1585) | Lost 1-2 | -161502 |
| 4standard | 191 | Iwaide, Yoshitaka (1505) | Won 2-1 | +181520 |
| 5standard | 175 | Kimura, Shigeki (1552) | Won 2-0 | +181538 |
| 6standard | 104 | Takanashi, Kouji (1696) | Won 2-1 | +211559 |
| 7standard | 46 | Endo, Jun'Ichi (1587) | Won 2-0 | +191578 |
| 8standard | 36 | Naitou, Takashi (1595) | Lost 0-2 | -181560 |
| 9standard | 46 | Wada, Hiroya (1653) | Lost 1-2 | -161544 |
| top | average opponent: 1586record: 5-3 | new rating: 1544 | ||