Sibata, Kouji
Current rating: 1625
Record: 25-19
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1566 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 616 | Kikuchi, Masashi (1500) | Won 2-0 | +171583 |
| 2sealed | 372 | Yamamoto, Keita (1518) | Won 2-0 | +161599 |
| 3sealed | 352 | Guo, Cheng (1660) | Lost 0-2 | -171582 |
| 4sealed | 729 | Zhao, Tianyu (1564) | Lost 0-2 | -181564 |
| 5sealed | 614 | Watanabe, Shouichi (1483) | Won 2-0 | +171581 |
| 6sealed | 434 | Seiwada, Koyo (1519) | Won 2-0 | +161597 |
| 7sealed | 334 | Sasaki, Tsutomu (1596) | Won 2-0 | +181615 |
| 8sealed | 315 | Nakayama, Ian (1549) | Won 2-0 | +171632 |
| 9sealed | 152 | Kidera, Seita (1750) | Won 2-0 | +201652 |
| 10draft | 734 | Hirabayashi, Kazuya (1762) | Lost 0-2 | -161636 |
| 11draft | 733 | Hiromasa, Ryuusuke (1756) | Lost 0-2 | -151621 |
| 12draft | 573 | Natsume, Takuya (1808) | Won 2-1 | +211642 |
| 13draft | 670 | Usui, Haruki (1825) | Won 2-1 | +211663 |
| 14draft | 648 | Okuno, Ryohei (1660) | Lost 1-2 | -181645 |
| 15draft | 642 | Ishii, Shinji (1539) | Lost 0-2 | -201625 |
| top | average opponent: 1633record: 9-6 | new rating: 1625 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1573 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 485 | Toshiaki, Otsuki (1500) | Won 2-1 | +161589 |
| 4standard | 85 | Baba, Yasunori (1774) | Lost 0-2 | -141575 |
| 5standard | 244 | Swords, Chester (1864) | Lost 1-2 | -131562 |
| 6standard | 570 | Kakumae, Teruya (1739) | Won 2-1 | +211583 |
| 7standard | 432 | Miura, Yuuki (1665) | Lost 0-2 | -161567 |
| 8standard | 669 | Terada, Tadashi (1596) | Lost 1-2 | -181549 |
| 9standard | 774 | Sakane, Kota (1475) | Won 2-1 | +171566 |
| top | average opponent: 1659record: 3-4 | new rating: 1566 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1558 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 216 | Ishida, Shinpei (1535) | Won 2-0 | +171575 |
| 4sealed | 18 | Kozai, Tomonori (1576) | Won 2-0 | +181593 |
| 5sealed | 12 | Nishimura, Masateru (1606) | Won 2-1 | +181611 |
| 6sealed | 22 | Ootani, Masashi (1493) | Lost 1-2 | -201591 |
| 7sealed | 65 | Wada, Kazunori (1629) | Won 2-0 | +191610 |
| 8sealed | 27 | Kumasaka, Shotaro (1590) | Lost 0-2 | -181592 |
| 9sealed | 36 | Ikeda, Ippei (1543) | Lost 1-2 | -191573 |
| top | average opponent: 1567record: 4-3 | new rating: 1573 | ||
| Grand Prix Shizuoka 2015 (KTK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 39 | Kawakami, Tomoyuki (1500) | Won 2-0 | +181518 |
| 2sealed | 99 | Nakamatu, Hirohumi (1433) | Won 2-1 | +161534 |
| 3sealed | 8 | Ueda, Kazuki (1481) | Lost 1-2 | -191515 |
| 4sealed | 292 | Konta, Takumi (1548) | Lost 1-2 | -171498 |
| 5sealed | 263 | Takashima, Kosuke (1516) | Won 2-0 | +181516 |
| 6sealed | 218 | Honda, Takeshi (1547) | Won 2-1 | +191535 |
| 7sealed | 127 | Suzuki, Nobuya (1503) | Won 2-1 | +171552 |
| 8sealed | 119 | Kondou, Keiichi (1571) | Won 2-1 | +191571 |
| 9sealed | 89 | Hayashi, Syouichirou (1614) | Won 2-0 | +181589 |
| 10draft | 91 | Suzuki, Kei (1755) | Lost 0-2 | -151574 |
| 11draft | 61 | Tachibana, Kentarou (1632) | Won 2-1 | +201594 |
| 12draft | 85 | Otsuka, Yohei (1600) | Won 2-1 | +181612 |
| 13draft | 27 | Iwase, Akira (1632) | Lost 1-2 | -181594 |
| 14draft | 67 | Yokoya, Hajime (1597) | Lost 1-2 | -181576 |
| 15draft | 85 | Kodera, Yasunori (1547) | Lost 0-2 | -181558 |
| top | average opponent: 1565record: 9-6 | new rating: 1558 | ||