Sogabe, Ippei
Current rating: 1666
Record: 47-37-2 (GP) / 2-4 (professional)
Grand Prix Hiroshima 2001Grand Prix Shizuoka 2001Grand Prix Fukuoka 2002Grand Prix Utsunomiya 2002Grand Prix Hiroshima 2003Grand Prix Kyoto 2003Grand Prix Shizuoka 2003Grand Prix Okayama 2004Grand Prix Sendai 2004Grand Prix Matsuyama 2005Grand Prix Kitakyushu 2005Pro Tour Prague 2006Grand Prix Hiroshima 2006Grand Prix Yamagata 2006Grand Prix Shizuoka 2008
| Grand Prix Shizuoka 2008 (MOR standard) | starting rating: 1665 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 160 | Ishii, Takumi (1482) | Won 2-1 | +151680 |
| 2standard | 191 | Matsumoto, Fumiya (1593) | Won 2-0 | +161696 |
| 3standard | 71 | Minagawa, Daisuke (1558) | Draw 1-1 | -21694 |
| 4standard | 99 | Shimizu, Kouji (1536) | Won 2-1 | +151709 |
| 5standard | 44 | Fukasawa, Taichi (1551) | Won 2-1 | +151724 |
| 6standard | 22 | Matsushita, Masakazu (1765) | Lost 1-2 | -171707 |
| 7standard | 77 | Sakurada, Kouichi (1592) | Lost 0-1 | -201687 |
| 8standard | 183 | Itou, Kouei (1536) | Lost 0-2 | -211666 |
| top | average opponent: 1577record: 4-3-1 | new rating: 1666 | ||
| Grand Prix Yamagata 2006 (TSP limited) | starting rating: 1591 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 49 | Wachi, Shinya (1569) | Won 2-1 | +181609 |
| 5sealed | 14 | Ootsuka, Koutarou (1803) | Won 2-1 | +211630 |
| 6sealed | 10 | Hirose, Daisuke (1604) | Lost 0-2 | -181612 |
| 7sealed | 99 | Chan, Tiago (2029) | Lost 1-2 | -111601 |
| 8sealed | 39 | Sakakibara, Wataru (1555) | Won 2-0 | +171618 |
| 9draft | 11 | Kabeshita, Yoshito (1530) | Won 2-0 | +161634 |
| 10draft | 12 | Murakami, Yuuki (Miyagi) (1836) | Lost 0-2 | -141620 |
| 11draft | 25 | Snepvangers, Bram (1922) | Won 2-0 | +231643 |
| 12draft | 9 | Kudo, Koichi (1694) | Lost 1-2 | -171626 |
| 13draft | 30 | Arita, Ryuichi (1833) | Won 2-0 | +221648 |
| 14draft | 17 | Okumura, Yoshito (1599) | Won 2-0 | +171665 |
| top | average opponent: 1725record: 7-4 | new rating: 1665 | ||
| Grand Prix Hiroshima 2006 (CSP limited) | starting rating: 1609 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 31 | Takahashi, Yuta (1636) | Won 2-1 | +191628 |
| 3sealed | 43 | Yamada, Tsutomu (1572) | Lost 1-2 | -191609 |
| 4sealed | 107 | Matsushita, Masakazu (1619) | Lost 1-2 | -181591 |
| top | average opponent: 1609record: 1-2 | new rating: 1591 | ||
| Pro Tour Prague 2006 (DIS draft) | starting rating: 1644 | |||
| round | table | opponent (rating) | result | Δrating |
| 1draft | 164 | Osawa, Takuya (1840) | Lost 0-2 | -141630 |
| 2draft | 10 | Parnell, Taylor (1624) | Lost 1-2 | -181612 |
| 3draft | 205 | Linde, Dylan (1573) | Won 2-1 | +171629 |
| 4draft | 14 | Kennes, Johan (1695) | Won 2-0 | +191648 |
| 5draft | 46 | Barclay, Bradley (1691) | Lost 0-2 | -171631 |
| 6draft | 106 | Hosono, Yasuto (1428) | Lost 0-2 | -221609 |
| top | average opponent: 1642record: 2-4 | new rating: 1609 | ||
| Grand Prix Kitakyushu 2005 (extended) | starting rating: 1653 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 23 | Kubota, Kenta (1686) | Lost 0-2 | -181635 |
| 3extended | 87 | Yamasaki, Sadaharu (1387) | Won 2-0 | +141649 |
| 4extended | 76 | Shigehara, Akinori (1523) | Won 2-1 | +161665 |
| 5extended | 57 | Kikuchi, Osamu (1528) | Lost 1-2 | -211644 |
| top | average opponent: 1531record: 2-2 | new rating: 1644 | ||
| Grand Prix Matsuyama 2005 (BOK limited) | starting rating: 1670 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 27 | Azuma, Motokiyo (1815) | Won 2-1 | +201690 |
| 3sealed | 12 | Maki, Koichiro (1774) | Lost 0-2 | -161674 |
| 4sealed | 87 | Fujiyama, Shinichi (1518) | Lost 0-2 | -211653 |
| top | average opponent: 1702record: 1-2 | new rating: 1653 | ||
| Grand Prix Sendai 2004 (DST limited) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 24 | Onta, Hirofumi (1453) | Won 2-0 | +171535 |
| 3sealed | 74 | Sugahara, Hideyuki (1499) | Won 2-0 | +171552 |
| 4sealed | 12 | Yasutomi, Hiroto (1634) | Lost 1-2 | -161536 |
| 5sealed | 75 | Mitsui, Hideo (1511) | Won 2-0 | +171553 |
| 6sealed | 37 | Sumi, Kazuhiko (1649) | Won 2-0 | +201573 |
| 7sealed | 32 | Ruel, Olivier (1978) | Won 2-0 | +251598 |
| 8sealed | 15 | Ibamoto, Masami (1779) | ID | 01598 |
| 9draft | 24 | Suzuki, Masatsuna (1740) | Won 2-0 | +201618 |
| 10draft | 21 | Shimura, Ichirou (1803) | Lost 0-2 | -141604 |
| 11draft | 26 | Ota, Yusuke (1675) | Won 2-0 | +191623 |
| 12draft | 3 | Suzuki, Masatsuna (1755) | Won 2-1 | +201643 |
| 13draft | 10 | Ishikka, Takehiro (1660) | Won 2-1 | +191662 |
| 14draft | 25 | Fukuchi, Takahiro (1748) | Won 2-1 | +191681 |
| Qdraft | Ruel, Antoine (2039) | Lost 1-2 | -111670 | |
| top | average opponent: 1709record: 10-3-1 | new rating: 1670 | ||
| Grand Prix Okayama 2004 (extended) | starting rating: 1554 | |||
| round | table | opponent (rating) | result | Δrating |
| 3extended | 35 | Fukuda, Takashi (1511) | Won 2-0 | +181572 |
| 4extended | 35 | Taru, Genki (1612) | Lost 0-2 | -181554 |
| 5extended | 76 | Ueta, Hiroki (1546) | Lost 1-2 | -181536 |
| 6extended | 66 | Kim, Cynic (1520) | Lost 0-2 | -181518 |
| top | average opponent: 1548record: 1-3 | new rating: 1518 | ||
| Grand Prix Shizuoka 2003 (MRD limited) | starting rating: 1571 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 140 | Shibuya, Yuuto (1620) | Lost 0-2 | -171554 |
| 3sealed | 235 | Osawa, Takuya (1575) | Won 2-0 | +181572 |
| 4sealed | 151 | Ishii, Hayato (1570) | Lost 0-2 | -181554 |
| top | average opponent: 1588record: 1-2 | new rating: 1554 | ||
| Grand Prix Kyoto 2003 (LGN limited) | starting rating: 1578 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 166 | Iizuka, Shun (1540) | Lost 1-2 | -191559 |
| 2sealed | 232 | Nose, Masahiro (1417) | Won 2-0 | +161575 |
| 3sealed | 207 | Kamei, Hidenori (1463) | Won 2-0 | +161591 |
| 4sealed | 150 | Hara, Taketoshi (1501) | Lost 0-2 | -201571 |
| top | average opponent: 1480record: 2-2 | new rating: 1571 | ||
| Grand Prix Hiroshima 2003 (extended) | starting rating: 1601 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 95 | Maruyama, Takaaki (1476) | Won 2-0 | +161617 |
| 3extended | 45 | Lee, Ji-Hoon (1538) | Lost 1-2 | -201597 |
| 4extended | 84 | Okuda, Masateru (1517) | Lost 1-2 | -191578 |
| top | average opponent: 1510record: 1-2 | new rating: 1578 | ||
| Grand Prix Utsunomiya 2002 (ONS rochester) | starting rating: 1610 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 39 | Maruyama, Takaaki (1491) | Won 2-0 | +161626 |
| 3sealed | 58 | Kushibe, Toshiki (1486) | Won 2-1 | +161642 |
| 4sealed | 26 | Nomura, Eiji (1551) | Lost 0-2 | -201622 |
| 5sealed | 60 | Fujita, Toshitake (1536) | Won 2-0 | +161638 |
| 6sealed | 34 | Kinoshita, Junichi (1695) | Lost 1-2 | -171621 |
| 7sealed | 98 | Sakuma, Toshimitsu (1495) | Lost 1-2 | -201601 |
| top | average opponent: 1542record: 3-3 | new rating: 1601 | ||
| Grand Prix Fukuoka 2002 (TOR limited) | starting rating: 1542 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 58 | Someya, Yu (1595) | Won 2-1 | +191561 |
| 3sealed | 55 | Murakami, Yuuki (Miyagi) (1668) | Lost 1-2 | -161545 |
| 4sealed | 89 | Ishikawa, Kazuto (1489) | Won 2-1 | +171562 |
| 5sealed | 63 | Iwai, Tsuyoshi (1662) | Draw 1-1 | +21564 |
| 6sealed | 65 | Kinoshita, Eiji (1536) | Won 2-1 | +181582 |
| 7sealed | 37 | Yasui, Koichi (1556) | Won 2-0 | +171599 |
| 8draft | 20 | Itou, Kenshirou (1778) | Won 2-1 | +211620 |
| 9draft | 12 | Yamakawa, Youichirou (1614) | Won 2-0 | +181638 |
| 10draft | 7 | Ueda, Katsuya (1611) | Lost 1-2 | -181620 |
| 11draft | 13 | Hirabayashi, Kazuya (1850) | Lost 1-2 | -141606 |
| 12draft | 20 | Kashima, Akihiro (1700) | Lost 0-2 | -161590 |
| 13draft | 24 | Itou, Kenshirou (1743) | Won 2-0 | +201610 |
| top | average opponent: 1650record: 7-4-1 | new rating: 1610 | ||
| Grand Prix Shizuoka 2001 (ODY limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 114 | Suzuki, Michihiro (1500) | Lost 1-2 | -171447 |
| 2sealed | 241 | Matsui, Masanobu (1482) | Won 2-0 | +181465 |
| 3sealed | 179 | Sawada, Ryosuke (1491) | Lost 0-2 | -171448 |
| 4sealed | 227 | Kamada, Shota (1481) | Won 2-0 | +181466 |
| 5sealed | 219 | Masui, Noriaki (1500) | Won 2-1 | +191485 |
| 6sealed | 142 | Miyata, Tatsuya (1520) | Won 2-0 | +191504 |
| 7sealed | 67 | Taru, Genki (1560) | Won 2-0 | +191523 |
| 8sealed | 38 | Okabayashi, Masanao (1620) | Won 2-1 | +191542 |
| top | average opponent: 1519record: 6-2 | new rating: 1542 | ||
| Grand Prix Hiroshima 2001 (INV limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 5 | Shibuya, Tsutomu (1500) | Won 2-0 | +181518 |
| 2sealed | 72 | Yamada, Noriaki (1518) | Lost 1-2 | -181500 |
| 3sealed | 137 | Matsuo, Yusuke (1501) | Lost 0-2 | -181482 |
| 4sealed | 149 | Miyazawa, Hisashi (1482) | Lost 0-2 | -181464 |
| top | average opponent: 1500record: 1-3 | new rating: 1464 | ||