Doi, Fumiaki
Current rating: 1630
Record: 48-41-1
Grand Prix Kyoto 2000Grand Prix Hiroshima 2001Grand Prix Kobe 2001Grand Prix Fukuoka 2002Grand Prix Utsunomiya 2002Grand Prix Hiroshima 2003Grand Prix Okayama 2004Grand Prix Matsuyama 2005Grand Prix Hiroshima 2006Grand Prix Kyoto 2007Grand Prix Okayama 2008Grand Prix Hiroshima 2011Grand Prix Kobe 2012Grand Prix Kobe 2014
| Grand Prix Kobe 2014 (modern) | starting rating: 1583 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 218 | Nishina, Tomoya (1508) | Won 2-0 | +171600 |
| 2modern | 181 | Kinpara, Tsunahiro (1535) | Won 2-0 | +171617 |
| 3modern | 41 | Arita, Ryuichi (1667) | Lost 1-2 | -171600 |
| 4modern | 190 | Kochi, Daiki (1570) | Lost 1-2 | -191581 |
| 5modern | 336 | Fukui, Yuzi (1506) | Won 2-0 | +171598 |
| 6modern | 354 | Maeda, Lucio (1720) | Won 2-0 | +201618 |
| 7modern | 218 | Andou, Shuusuke (1543) | Won 2-1 | +171635 |
| 8modern | 174 | Ichikawa, Tatsuya (1528) | Won 2-0 | +161651 |
| 9modern | 110 | Sato, Kazuhito (1513) | Lost 1-2 | -211630 |
| top | average opponent: 1566record: 6-3 | new rating: 1630 | ||
| Grand Prix Kobe 2012 (DKA limited) | starting rating: 1601 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 285 | Yagi, Wataru (1485) | Won 2-1 | +161617 |
| 3sealed | 119 | Sean O., (1520) | Won 2-0 | +171634 |
| 4sealed | 38 | Sunada, Shougo (1780) | Lost 1-2 | -161618 |
| 5sealed | 134 | Hirosawa, Yuuta (1739) | Lost 1-2 | -161602 |
| 6sealed | 310 | Yoshida, Satoshi (1539) | Lost 0-2 | -191583 |
| top | average opponent: 1613record: 2-3 | new rating: 1583 | ||
| Grand Prix Hiroshima 2011 (ISD standard) | starting rating: 1595 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 174 | Matsushima, Kouji (1526) | Won 2-1 | +171612 |
| 2standard | 12 | Miyazono, Takeshi (1532) | Won 2-1 | +161628 |
| 3standard | 93 | Imada, Naoyuki (1536) | Lost 0-2 | -191609 |
| 4standard | 172 | Tashima, Chihiro (1636) | Won 2-0 | +181627 |
| 5standard | 63 | Ooshima, Koufuku (1502) | Won 2-1 | +161643 |
| 6standard | 102 | Ueyama, Yuji (1469) | Lost 0-2 | -211622 |
| 7standard | 130 | Naoyuki M., (1491) | Lost 0-2 | -211601 |
| top | average opponent: 1527record: 4-3 | new rating: 1601 | ||
| Grand Prix Okayama 2008 (ALA limited) | starting rating: 1562 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 105 | Uchida, Momotarou (1577) | Lost 0-2 | -181544 |
| 3sealed | 200 | Kajitani, Takayuki (1500) | Lost 0-2 | -191525 |
| 4sealed | 220 | Nomura, Eiji (1669) | Won 2-0 | +211546 |
| 5sealed | 209 | Sasaki, Yuusuke (Hyogo) (1512) | Draw 1-1 | -11545 |
| 6sealed | 52 | Maki, Toshiya (1500) | Won 2-1 | +171562 |
| 7sealed | 64 | Okamoto, Takaki (1455) | Won 2-1 | +171579 |
| 8sealed | 37 | Sandroni, Riccardo (1498) | Won 2-0 | +161595 |
| top | average opponent: 1530record: 4-2-1 | new rating: 1595 | ||
| Grand Prix Kyoto 2007 (PLC standard) | starting rating: 1527 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 294 | Naka, Yoshihiro (1500) | Lost 0-2 | -181509 |
| 2standard | 244 | Iioka, Kenta (1400) | Won 2-0 | +161525 |
| 3standard | 268 | Tamura, Masashi (1500) | Won 2-1 | +171542 |
| 4standard | 212 | Hanaoka, Toshifumi (1645) | Won 2-1 | +201562 |
| 5standard | 102 | Furukubo, Eiji (1538) | Won 2-0 | +181580 |
| 6standard | 99 | Tsukamoto, Tatsushi (1556) | Lost 1-2 | -191561 |
| 7standard | 81 | Mori, Junpei (1613) | Won 2-1 | +191580 |
| 8standard | 106 | Yana, Kazuaki (1555) | Lost 0-2 | -181562 |
| top | average opponent: 1538record: 5-3 | new rating: 1562 | ||
| Grand Prix Hiroshima 2006 (CSP limited) | starting rating: 1499 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 28 | Suzuki, Yuuji (1620) | Won 2-1 | +201519 |
| 2sealed | 16 | Ura, Tsuyoshi (1548) | Won 2-0 | +191538 |
| 3sealed | 27 | Mitamura, Kazuya (1651) | Won 2-0 | +201558 |
| 4sealed | 53 | Bracht, Maximilian (1798) | Won 2-0 | +221580 |
| 5sealed | 13 | Wada, Yuki (1519) | Lost 0-2 | -191561 |
| 6sealed | 32 | Kuroda, Ryouhei (1612) | Lost 0-2 | -171544 |
| 7sealed | 95 | Fujimoto, Taichi (1614) | Lost 0-2 | -171527 |
| top | average opponent: 1623record: 4-3 | new rating: 1527 | ||
| Grand Prix Matsuyama 2005 (BOK limited) | starting rating: 1461 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 17 | Yamashita, Kohji (1422) | Won 2-0 | +171478 |
| 2sealed | 5 | Imamura, Hirotaka (1518) | Won 2-0 | +191497 |
| 3sealed | 55 | Oonishi, Hiroaki (1538) | Won 2-0 | +191516 |
| 4sealed | 34 | Tanahashi, Masayasu (1576) | Won 2-1 | +191535 |
| 5sealed | 8 | Miki, Sadayoshi (1558) | Lost 0-2 | -181517 |
| 6sealed | 39 | Mori, Katsuhiro (1952) | Won 2-1 | +261543 |
| 7sealed | 21 | Shiino, Youichi (1504) | Won 2-0 | +171560 |
| 8sealed | 11 | Katayama, Hidenori (1552) | ID | 01560 |
| 9draft | 10 | Sorensen, Robin G (1597) | Lost 1-2 | -171543 |
| 10draft | 28 | Inanaga, Nobuyuki (1590) | Won 2-0 | +191562 |
| 11draft | 17 | Yanagi, Hiroki (1640) | Lost 1-2 | -171545 |
| 12draft | 17 | Mihara, Makihito (1858) | Lost 1-2 | -121533 |
| 13draft | 14 | Inanaga, Nobuyuki (1553) | Lost 0-2 | -181515 |
| 14draft | 7 | Tashiro, Yoshiaki (1639) | Lost 0-2 | -161499 |
| top | average opponent: 1607record: 7-6-1 | new rating: 1499 | ||
| Grand Prix Okayama 2004 (extended) | starting rating: 1478 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 30 | Kawai, Katsuya (1518) | Lost 1-2 | -181460 |
| 2extended | 131 | Mukumoto, Akihiro (1482) | Won 2-0 | +191479 |
| 3extended | 82 | Ohige, Tatsuya (1483) | Won 2-0 | +181497 |
| 4extended | 58 | Fukushima, Hirotomo (1481) | Lost 1-2 | -181479 |
| 5extended | 148 | Miyake, Tsubasa (1501) | Lost 0-2 | -181461 |
| top | average opponent: 1493record: 2-3 | new rating: 1461 | ||
| Grand Prix Hiroshima 2003 (extended) | starting rating: 1510 | |||
| round | table | opponent (rating) | result | Δrating |
| 4extended | 28 | Itano, Masao (1535) | Lost 0-2 | -171493 |
| 5extended | 43 | Kojima, Yoshimasa (1522) | Won 2-1 | +181511 |
| 6extended | 45 | Tabuchi, Atsushi (1475) | Lost 0-2 | -181493 |
| 7extended | 64 | Taru, Genki (1665) | Lost 0-2 | -151478 |
| top | average opponent: 1549record: 1-3 | new rating: 1478 | ||
| Grand Prix Utsunomiya 2002 (ONS rochester) | starting rating: 1511 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 27 | Jincho, Takayoshi (1500) | Won 2-0 | +181529 |
| 2sealed | 145 | Watanabe, Tetsuya (1517) | Lost 0-2 | -191510 |
| 3sealed | 163 | Takeyama, Yoichiro (1499) | Won 2-0 | +181528 |
| 4sealed | 158 | Oomori, Kazuki (1532) | Lost 1-2 | -181510 |
| 5sealed | 163 | Ito, Shuhei (1517) | Won 2-0 | +181528 |
| 6sealed | 112 | Sugimori, Kazutaka (1517) | Lost 0-2 | -181510 |
| top | average opponent: 1513record: 3-3 | new rating: 1510 | ||
| Grand Prix Fukuoka 2002 (TOR limited) | starting rating: 1511 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 30 | Yun, Hwan-Joon (1500) | Lost 0-2 | -181493 |
| 2sealed | 142 | Nakamura, Kenji (1482) | Won 2-0 | +171510 |
| 3sealed | 99 | Morita, Katsunobu (1468) | Won 2-1 | +181528 |
| 4sealed | 68 | Someya, Yu (1592) | Lost 1-2 | -171511 |
| top | average opponent: 1511record: 2-2 | new rating: 1511 | ||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1532 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 284 | Ando, Tetsuhito (1518) | Lost 1-2 | -191513 |
| 3block | 394 | Toyoda, Takeshi (1500) | Won 2-1 | +181531 |
| 4block | 176 | Kurushima, Kouji (1517) | Lost 1-2 | -181513 |
| 5block | 307 | Ikeda, Yasumasa (1431) | Won 2-1 | +161529 |
| 6block | 272 | Morisaki, Nobuki (1501) | Lost 1-2 | -181511 |
| top | average opponent: 1493record: 2-3 | new rating: 1511 | ||
| Grand Prix Hiroshima 2001 (INV limited) | starting rating: 1570 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 173 | Watanabe, Shinji (Okayama) (1500) | Lost 1-2 | -191551 |
| 2sealed | 155 | Ishibashi, Yoshiro (1482) | Lost 1-2 | -191532 |
| top | average opponent: 1491record: 0-2 | new rating: 1532 | ||
| Grand Prix Kyoto 2000 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 169 | Tanaka, Yoshinori (1500) | Won 2-0 | +181518 |
| 2extended | 36 | Kato, Ko (1518) | Won 2-1 | +181536 |
| 3extended | 122 | Hayashi, Masahiro (1518) | Won 2-1 | +181554 |
| 4extended | 34 | Yokoyama, Kazuya (1537) | Lost 0-2 | -191535 |
| 5extended | 66 | Yamada, Yoshihiro (1536) | Won 2-1 | +181553 |
| 6extended | 25 | Okuda, Masateru (1535) | Lost 1-2 | -181535 |
| 7extended | 88 | Anan, Go (1501) | Won 2-0 | +171552 |
| 8extended | 46 | Yamasaki, Rintarou (1536) | Won 2-0 | +181570 |
| top | average opponent: 1523record: 6-2 | new rating: 1570 | ||