Kubota, Kenta
Current rating: 1726 (#5005)
Record: 65-45-3
Grand Prix Yokohama 2003Grand Prix Sendai 2004Grand Prix Nagoya 2004Grand Prix Yokohama 2004Grand Prix Matsuyama 2005Grand Prix Niigata 2005Grand Prix Kitakyushu 2005Grand Prix Yamagata 2006Grand Prix Shizuoka 2008Grand Prix Niigata 2009Grand Prix Yokohama 2013Grand Prix Shizuoka 2015Grand Prix Chiba 2018
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1750 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 263 | Saito, Naruto (1375) | Lost 0-2 | -251725 |
| 2sealed | 733 | Hashimoto, Satoshi 9278 (1484) | Lost 0-2 | -221703 |
| 3sealed | 1143 | Jinno, Tatsuya (1400) | Won 2-1 | +131716 |
| 4sealed | 949 | Kawamura, Shintaro (1481) | Won 2-0 | +131729 |
| 5sealed | 897 | Fujita, Osamu (1675) | Won 2-0 | +171746 |
| 6sealed | 659 | Yokoyama, Takaya (1594) | Lost 1-2 | -201726 |
| top | average opponent: 1502record: 3-3 | new rating: 1726 | ||
| Grand Prix Shizuoka 2015 (KTK limited) | starting rating: 1772 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 740 | Morishita, Yoshihisa (1515) | Lost 0-2 | -221750 |
| top | record: 0-1 | new rating: 1750 | ||
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1792 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 197 | Shiihara, Jyunki (1500) | Won 2-1 | +131805 |
| 2sealed | 94 | Hosaka, Yoshiteru (1520) | Lost 1-2 | -231782 |
| 3sealed | 260 | Nakamura, Yuuta (1500) | Won 2-0 | +131795 |
| 4sealed | 205 | Tsuchiya, Yoshihiro (1431) | Won 2-0 | +121807 |
| 5sealed | 121 | Onodera, Yusuke (1538) | Lost 0-2 | -231784 |
| 6sealed | 282 | Oiso, Kenji (1524) | Won 2-1 | +131797 |
| 7sealed | 153 | Hirose, Daichi (1404) | Lost 0-2 | -251772 |
| top | average opponent: 1488record: 4-3 | new rating: 1772 | ||
| Grand Prix Niigata 2009 (M10 limited) | starting rating: 1695 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 85 | Kumoura, Daisuke (1728) | Won 2-0 | +181713 |
| 3sealed | 56 | Yao, Shunsuke (1544) | Lost 0-2 | -211692 |
| 4sealed | 118 | Hoshino, Shinya (1521) | Won 2-1 | +151707 |
| 5sealed | 77 | Kanazawa, Hiroyasu (1656) | Won 2-0 | +171724 |
| 6sealed | 55 | Juumonji, Ryou (1698) | Won 2-0 | +181742 |
| 7sealed | 28 | Yamamoto, Daichi (1510) | Won 2-1 | +131755 |
| 8sealed | 7 | Yamaguchi, Hiroshi (1664) | Won 2-1 | +171772 |
| 9sealed | 14 | Ishikawa, Masayo (1859) | Lost 1-2 | -171755 |
| 10draft | 36 | Murata, Daisuke (1650) | Won 2-1 | +161771 |
| 11draft | 4 | Muguro, Kaito (1614) | Won 2-1 | +161787 |
| 12draft | 7 | Nakamura, Yusuke (1690) | Won 2-1 | +161803 |
| 13draft | 37 | Yamamoto, Kentaro (1898) | Lost 1-2 | -161787 |
| 14draft | 16 | Yamamoto, Akimasa (1931) | Won 2-1 | +201807 |
| 15draft | 9 | Watanabe, Yuuya (1975) | Lost 1-2 | -151792 |
| top | average opponent: 1710record: 10-4 | new rating: 1792 | ||
| Grand Prix Shizuoka 2008 (MOR standard) | starting rating: 1645 | |||
| round | table | opponent (rating) | result | Δrating |
| 4standard | 13 | Chen, Liang (1591) | Won 2-1 | +171662 |
| 5standard | 38 | Furukawa, Yasushi (1603) | Won 2-1 | +171679 |
| 6standard | 9 | Seki, Keita (1616) | Won 2-0 | +171696 |
| 7standard | 266 | Koyama, Kenta (1798) | Won 2-1 | +191715 |
| 8standard | 194 | Tsumura, Kenji (2001) | Lost 0-2 | -131702 |
| 9standard | 81 | Moriya, Daisuke (1613) | Won 2-1 | +171719 |
| 10standard | 5 | Watanabe, Masayoshi (1585) | Lost 1-2 | -211698 |
| 11standard | 23 | Yoda, Kazuya (1662) | Won 2-0 | +181716 |
| 12standard | 49 | Nagashima, Makoto (1601) | Lost 0-2 | -201696 |
| 13standard | 2 | Hirayama, Daisuke (1634) | Lost 1-2 | -191677 |
| 14standard | 29 | Hwang, Chi-Chung (1724) | Won 2-1 | +181695 |
| 15standard | 19 | Takanashi, Kouji (1750) | Won 2-1 | +191714 |
| 16standard | 42 | Dan, Akira (1611) | Lost 1-2 | -191695 |
| top | average opponent: 1676record: 8-5 | new rating: 1695 | ||
| Grand Prix Yamagata 2006 (TSP limited) | starting rating: 1678 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 68 | Iizuka, Shun (1674) | Won 2-0 | +181696 |
| 3sealed | 39 | Fujimoto, Takehiro (1570) | Won 2-0 | +161712 |
| 4sealed | 16 | Sugiura, Kiyohiro (1424) | Lost 1-2 | -231689 |
| 5sealed | 53 | Toida, Kiyoshi (1511) | Lost 1-2 | -211668 |
| 6sealed | 95 | Tsushima, Tomoya (1729) | Won 2-0 | +191687 |
| 7sealed | 95 | Kabeshita, Yoshito (1489) | Lost 0-2 | -221665 |
| 8sealed | 72 | Takeda, Satoru (1528) | Lost 0-2 | -201645 |
| top | average opponent: 1561record: 3-4 | new rating: 1645 | ||
| Grand Prix Kitakyushu 2005 (extended) | starting rating: 1686 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 23 | Sogabe, Ippei (1653) | Won 2-0 | +171703 |
| 3extended | 10 | Yamanishi, Mamoru (1623) | Won 2-1 | +161719 |
| 4extended | 29 | Ozaki, Youichirou (1499) | Won 2-1 | +151734 |
| 5extended | 6 | Hayashi, Hiroki (1663) | Lost 1-2 | -201714 |
| 6extended | 25 | Ikeda, Tsuyoshi (1797) | Lost 1-2 | -161698 |
| 7extended | 42 | Umeno, Kengo (1621) | Lost 1-2 | -201678 |
| top | average opponent: 1643record: 3-3 | new rating: 1678 | ||
| Grand Prix Niigata 2005 (Kamigawa block) | starting rating: 1689 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 98 | Takagi, Hitoshi (1584) | Won 2-1 | +161705 |
| 3block | 11 | Toshimi, Hirokazu (1521) | Lost 0-2 | -221683 |
| 4block | 84 | Hanaoka, Toshifumi (1402) | Won 2-0 | +131696 |
| 5block | 65 | Katayose, Shingo (1553) | Lost 1-2 | -201676 |
| 6block | 122 | Hoshiba, Shoma (1519) | Won 2-0 | +151691 |
| 7block | 58 | Otani, Hiroaki (1541) | Won 2-0 | +151706 |
| 8block | 60 | Oota, Tetsurou (1559) | Lost 1-2 | -201686 |
| top | average opponent: 1526record: 4-3 | new rating: 1686 | ||
| Grand Prix Matsuyama 2005 (BOK limited) | starting rating: 1638 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 76 | Hanaoka, Toshifumi (1423) | Won 2-0 | +141652 |
| 3sealed | 13 | Hirai, Kenta (1599) | Won 2-1 | +171669 |
| 4sealed | 31 | Nonaka, Kentarou (1655) | Won 2-1 | +181687 |
| 5sealed | 15 | Ishimura, Shintaro (1677) | Won 2-0 | +181705 |
| 6sealed | 6 | Chai, Royce Ming Huang (1890) | Won 2-0 | +211726 |
| 7sealed | 2 | Asahara, Akira (1960) | Lost 0-2 | -141712 |
| 8sealed | 10 | Sorensen, Robin G (1597) | ID | 01712 |
| 9draft | 17 | Wakisaka, Yuusuke (1586) | Lost 0-2 | -201692 |
| 10draft | 26 | Ishii, Taisuke (1606) | Lost 1-2 | -201672 |
| 11draft | 23 | Imamura, Taichirou (1590) | Won 2-0 | +171689 |
| 12draft | 3 | Morita, Masahiko (1951) | Draw 1-1 | +51694 |
| 13draft | 19 | Saitou, Kotatsu (1538) | Lost 1-2 | -211673 |
| 14draft | 24 | Kashihara, Motonori (1550) | Won 2-0 | +161689 |
| top | average opponent: 1663record: 7-4-2 | new rating: 1689 | ||
| Grand Prix Yokohama 2004 (COK limited) | starting rating: 1667 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 13 | Tamada, Ryoichi (1587) | Won 2-1 | +161683 |
| 4sealed | 67 | Lee, Ji-Hoon (1712) | Won 2-0 | +191702 |
| 5sealed | 27 | Shimada, Masatake (1727) | Won 2-0 | +181720 |
| 6sealed | 17 | Itou, Shougo (1661) | Lost 0-2 | -191701 |
| 7sealed | 19 | Hirabayashi, Ryuta (1542) | Won 2-1 | +151716 |
| 8sealed | 31 | Maki, Ryosuke (1518) | ID | 01716 |
| 9rochester | 31 | Sakajo, Yasuhisa (1647) | Lost 0-2 | -191697 |
| 10rochester | 23 | Taru, Genki (1691) | Lost 1-2 | -181679 |
| 11rochester | 1 | Mayuzumi, Shinichi (1655) | Lost 0-2 | -181661 |
| 12rochester | 30 | Kotajima, Yasuhiro (1542) | Lost 1-2 | -211640 |
| 13rochester | 22 | Kashima, Akihiro (1633) | Won 2-1 | +181658 |
| 14rochester | 26 | Koen, Yusuke (1538) | Lost 0-2 | -201638 |
| top | average opponent: 1621record: 5-6-1 | new rating: 1638 | ||
| Grand Prix Nagoya 2004 (5DN standard) | starting rating: 1640 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 158 | Inoue, Masashi(Nara) (1517) | Won 2-0 | +161656 |
| 3standard | 66 | Kumagai, Shinichi (1599) | Won 2-0 | +171673 |
| 4standard | 112 | Taniguchi, Yuusuke (1501) | Won 2-0 | +141687 |
| 5standard | 48 | Shiki, Kazumasa (1938) | Lost 1-2 | -131674 |
| 6standard | 82 | Minoue, Hiroyuki (1555) | Lost 0-2 | -201654 |
| 7standard | 149 | Nakamura, Kiyonari (1543) | Won 2-0 | +161670 |
| 8standard | 78 | Ikawa, Yoshihiko (1539) | Won 2-1 | +151685 |
| 9standard | 54 | Bandou, Junichirou (1654) | Lost 0-2 | -181667 |
| top | average opponent: 1606record: 5-3 | new rating: 1667 | ||
| Grand Prix Sendai 2004 (DST limited) | starting rating: 1519 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 53 | Yoshizawa, Hirotaka (1500) | Draw 1-1 | 01519 |
| 2sealed | 142 | Nozu, Shizutaka (1484) | Won 2-1 | +171536 |
| 3sealed | 88 | Sato, Daisuke (1434) | Won 2-1 | +161552 |
| 4sealed | 59 | Kuroda, Masashiro (2016) | Won 2-0 | +261578 |
| 5sealed | 29 | Ishikka, Takehiro (1585) | Won 2-1 | +181596 |
| 6sealed | 16 | Tanaka, Hisaya (1805) | Won 2-1 | +221618 |
| 7sealed | 7 | Kikuchi, Satoru (1631) | Won 2-1 | +181636 |
| 8sealed | 4 | Yamanaka, Toshihisa (1595) | Lost 0-2 | -181618 |
| 9draft | 25 | Ota, Yusuke (1677) | Won 2-1 | +191637 |
| 10draft | 30 | Kikuchi, Satoru (1651) | Lost 0-2 | -181619 |
| 11draft | 19 | Suzuki, Masatsuna (1739) | Lost 1-2 | -161603 |
| 12draft | 32 | Fukaishi, Takahiro (1560) | Won 2-0 | +171620 |
| 13draft | 11 | Anan, Go (1704) | Won 2-1 | +201640 |
| 14draft | 12 | Ootsuka, Koutarou (1597) | ID | 01640 |
| top | average opponent: 1641record: 9-3-2 | new rating: 1640 | ||
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 37 | Jung, Seong-hoon (1504) | Draw 1-1 | 01500 |
| 2block | 230 | Orihara, Jun (1590) | Lost 1-2 | -161484 |
| 3block | 326 | Iwasaki, Eiji (1482) | Won 2-0 | +181502 |
| 4block | 252 | Iitoi, Fumiaki (1501) | Lost 1-2 | -181484 |
| 5block | 309 | Miyanaga, Eiji (1482) | Won 2-1 | +181502 |
| 6block | 241 | Yoshino, Yorimoto (1467) | Won 2-0 | +171519 |
| 7block | 177 | Hashimoto, Yuu(Ibaraki) (1523) | Won 2-0 | +181537 |
| 8block | 120 | Itou, Shuuhei (1540) | Lost 0-2 | -181519 |
| top | average opponent: 1511record: 4-3-1 | new rating: 1519 | ||