Otahara, Sho
Current rating: 1645
Record: 45-39-2
| Grand Prix Yokohama 2019 (modern) | starting rating: 1632 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 240 | Takeuchi, Raku (1500) | Won 2-1 | +161648 |
| 2modern | 397 | Murakami, Hikaru (1658) | Won 2-1 | +181666 |
| 3modern | 402 | Masuda, Satoshi (1466) | Won 2-0 | +141680 |
| 4modern | 6 | Tomioka, Shota (1528) | Lost 1-2 | -211659 |
| 5modern | 351 | Ohmachi, Masato (1608) | Won 2-0 | +181677 |
| 6modern | 223 | Tanaka, Jun'ichi (1558) | Lost 1-2 | -211656 |
| 7modern | 479 | Kasai, Takahide (1430) | Won 2-0 | +141670 |
| 8modern | 260 | Yamada, Yosuke9422 (1626) | Won 2-1 | +171687 |
| 9modern | 108 | Keiji, Hirota (1574) | Lost 0-2 | -201667 |
| 10modern | 212 | Izumitani, Takuma (1509) | Won 2-1 | +161683 |
| 11modern | 168 | Ohashi, Gaku (1671) | Lost 1-2 | -191664 |
| 12modern | 191 | Kaneko, Yasuki (1616) | Lost 0-2 | -191645 |
| top | average opponent: 1562record: 7-5 | new rating: 1645 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1603 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 720 | Kamishiro, Issey (1500) | Lost 0-2 | -201583 |
| 2sealed | 788 | Arita, Koichi (1775) | Won 2-1 | +221605 |
| 3sealed | 890 | Yamamoto, Akimasa (1706) | Lost 0-2 | -171588 |
| 4sealed | 995 | Sawada, Tetsushi (1663) | Won 2-0 | +201608 |
| 5sealed | 642 | Nakayama, Yasuaki (1634) | Won 2-1 | +181626 |
| 6sealed | 439 | Oikawa, Ryusuke (1647) | Won 2-1 | +191645 |
| 7sealed | 325 | Wakizaka, Hironari (1589) | Won 2-0 | +171662 |
| 8sealed | 249 | Kasahara, Koichi (1504) | Won 2-1 | +151677 |
| 9sealed | 112 | Ueki, Junichi (1505) | Won 2-0 | +151692 |
| 10draft | 709 | Senba, Kotaro (1826) | Lost 0-2 | -161676 |
| 11draft | 667 | Haritani, Ryosuke (1611) | Lost 0-2 | -191657 |
| 12draft | 749 | Miwa, Kazuki (1515) | Won 2-0 | +151672 |
| 13draft | 583 | Negishi, Haruki (1518) | Lost 1-2 | -201652 |
| 15draft | 671 | Mori, Hisayuki (1565) | Lost 0-2 | -201632 |
| top | average opponent: 1611record: 8-6 | new rating: 1632 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1577 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 351 | Nakamura, Koki (1500) | Won 2-0 | +161593 |
| 2sealed | 252 | Onishi, Kouhei (1554) | Won 2-0 | +181611 |
| 3sealed | 341 | Yao, Chris (1786) | Lost 0-2 | -151596 |
| 4sealed | 570 | Nagai, Kousuke (1690) | Won 2-1 | +191615 |
| 5sealed | 230 | Furukawa, Syun (1593) | Won 2-1 | +181633 |
| 6sealed | 129 | Santos, Bernardo (2044) | Lost 0-2 | -111622 |
| 7sealed | 329 | Kanehira, Haruki (1507) | Won 2-1 | +161638 |
| 8sealed | 290 | Yokota, Kazuya (1460) | Won 2-1 | +151653 |
| 9sealed | 236 | Dezani, Jeremy (1869) | Lost 0-2 | -141639 |
| 10draft | 63 | Nakamura, Junpei (1625) | Lost 0-2 | -191620 |
| 11draft | 343 | Shiomi, Genki (1661) | Won 2-0 | +191639 |
| 12draft | 259 | Karatsu, Yoshifumi (1598) | Lost 0-2 | -191620 |
| 13draft | 261 | Nakano, Fumiki (1709) | Lost 0-2 | -161604 |
| 14draft | 126 | Saito, Yuki (1588) | Won 2-1 | +181622 |
| 15draft | 48 | Mayaguchi, Masaru (1586) | Lost 1-2 | -191603 |
| top | average opponent: 1651record: 8-7 | new rating: 1603 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1581 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 680 | Hirata, Masanari (1462) | Won 2-0 | +161597 |
| 2standard | 426 | Maruyama, Masaaki (1454) | Won 2-1 | +151612 |
| 3standard | 133 | Morishita, Mizuki (1799) | Lost 0-2 | -141598 |
| 4standard | 544 | Nakamura, Kousuke (1534) | Won 2-0 | +171615 |
| 5standard | 314 | Sakai, Toshinori (1748) | Lost 0-2 | -161599 |
| 6standard | 421 | Simic, Sasha (1516) | Won 2-1 | +171616 |
| 7standard | 258 | Yoshiyama, Makito (1555) | Lost 1-2 | -201596 |
| 8standard | 711 | Endo, Akiteru (1499) | Lost 0-2 | -191577 |
| top | average opponent: 1571record: 4-4 | new rating: 1577 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1403 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 401 | Masaya, Arai (1500) | Draw 1-1 | +11404 |
| 2standard | 759 | Tsukada, Kasumi (1350) | Won 2-0 | +171421 |
| 3standard | 767 | Okamoto, Takayoshi (1518) | Won 2-0 | +201441 |
| 4standard | 374 | Tsuchiya, Mihoko (1521) | Won 2-0 | +201461 |
| 5standard | 210 | Itou, Hayato (Osaka) (1541) | Lost 0-2 | -171444 |
| 6standard | 493 | Kimura, Yuito (1574) | Won 2-0 | +201464 |
| 7standard | 282 | Toshikawa, Kento (1540) | Won 2-0 | +201484 |
| 8standard | 164 | Yamada, Toshihiro (1773) | Won 2-1 | +231507 |
| 9standard | 93 | Horie, Tooru (1713) | Won 2-0 | +221529 |
| 10standard | 56 | Oikawa, Hakudou (1802) | Won 2-0 | +221551 |
| 11standard | 26 | Huang, Yung-Ming (1838) | Lost 0-2 | -121539 |
| 12standard | 85 | Sugawara, Atsushi (1669) | Won 2-0 | +201559 |
| 13standard | 47 | Yamaguchi, Satoru (1626) | Won 2-0 | +191578 |
| 14standard | 25 | Inui, Takashi (1669) | Lost 1-2 | -161562 |
| 15standard | 68 | Kojima, Yoshifumi (1639) | Won 2-1 | +191581 |
| top | average opponent: 1618record: 11-3-1 | new rating: 1581 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1383 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 575 | Soeda, Kohei (1494) | Won 2-0 | +201403 |
| 2sealed | 500 | Kumon, Shun (1542) | Lost 0-2 | -161387 |
| 3sealed | 894 | Oki, Hiroki (1465) | Lost 1-2 | -161371 |
| 4sealed | 1052 | Hasaba, Kenji (1424) | Won 2-1 | +191390 |
| 5sealed | 721 | Takeda, Hiroshi (1504) | Won 2-1 | +201410 |
| 6sealed | 649 | Yao, Shunsuke (1706) | Lost 0-2 | -131397 |
| 7sealed | 669 | Alhadhrami, Abdulrahman (1490) | Won 2-1 | +201417 |
| 8sealed | 426 | Yamaguchi, Shouta (1623) | Lost 1-2 | -141403 |
| top | average opponent: 1531record: 4-4 | new rating: 1403 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1435 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 348 | Yagawa, Masataka (1574) | Lost 0-2 | -151420 |
| 2sealed | 510 | Low, Pak Tsung (1455) | Lost 0-2 | -181402 |
| 3sealed | 563 | Arai, Ikki (1323) | Lost 1-2 | -191383 |
| top | average opponent: 1451record: 0-3 | new rating: 1383 | ||
| Grand Prix Shizuoka 2015 (KTK limited) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 770 | Tanimoto, Yusuke (1500) | Won 2-0 | +181484 |
| 2sealed | 700 | Furuta, Yusuke (1678) | Won 2-0 | +221506 |
| 3sealed | 751 | Kawamoto, Kengo (1512) | Lost 0-2 | -181488 |
| 4sealed | 762 | Saito, Shunsuke (1517) | Lost 0-2 | -171471 |
| 5sealed | 944 | Kodama, Yuu (1476) | Lost 0-2 | -181453 |
| 6sealed | 936 | Hsin, Michael (1485) | Lost 0-2 | -181435 |
| top | average opponent: 1528record: 2-4 | new rating: 1435 | ||
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 21 | Nagasaki, Ryou (1488) | Lost 0-2 | -181482 |
| 2sealed | 370 | Shimada, Akihiko (1482) | Won 2-0 | +181500 |
| 3sealed | 287 | Mihashi, Takanobu (1579) | Lost 0-2 | -171483 |
| 4sealed | 358 | Irie, Shun (1506) | Draw 1-1 | +11484 |
| 5sealed | 385 | Kawasaki, Shinsuke (1491) | Lost 1-2 | -181466 |
| top | average opponent: 1509record: 1-3-1 | new rating: 1466 | ||