Koyama, Kenta
Current rating: 1713 (#5723)
Record: 100-78-4 (GP) / 3-3 (professional)
- 2001
- 2002
- 2003
- 2004
- 2005
- 2006
- 2007
- 2008
- 2012
- 2013
- 2015
- 2016
- 2017
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1779 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 72 | Nakamura, Masami (1500) | Lost 0-2 | -231756 |
| 2sealed | 784 | Kawanishi, Naoya (1501) | Lost 1-2 | -231733 |
| 3sealed | 1080 | Holtzman, Jon (1560) | Lost 1-2 | -211712 |
| 4sealed | 1105 | Bain, Taylor (1373) | Won 2-0 | +121724 |
| 5sealed | 1005 | Chiu, Wai Kei (1381) | Won 2-0 | +121736 |
| 6sealed | 812 | Matsumoto, Miki (1454) | Lost 1-2 | -231713 |
| top | average opponent: 1462record: 2-4 | new rating: 1713 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1785 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 404 | Matsuo, Keisuke (1468) | Lost 1-2 | -231762 |
| 2sealed | 678 | Koshiba, Norihiko (1433) | Won 2-1 | +121774 |
| 3sealed | 919 | Sun, Guolong (1558) | Won 2-1 | +141788 |
| 4sealed | 727 | Taguchi, Takamasa (1518) | Won 2-0 | +131801 |
| 5sealed | 536 | Iwasaki, Mitsumasa (1503) | Won 2-1 | +131814 |
| 6sealed | 295 | Kitaoka, Takaaki (1602) | Lost 0-2 | -221792 |
| 7sealed | 233 | Takenaka, Susumu (1426) | Won 2-0 | +121804 |
| 8sealed | 289 | Ohki, Tatsuhiko (1605) | Won 2-0 | +141818 |
| 9sealed | 213 | Ooi, Masaki (1625) | Lost 1-2 | -211797 |
| 10draft | 141 | Tsuboyama, Shuta (1529) | Won 2-0 | +131810 |
| 11draft | 67 | Sasaki, Yusuke 6248 (1578) | Won 2-0 | +141824 |
| 12draft | 148 | Hirayama, Shigetaka (1598) | Lost 1-2 | -221802 |
| 13draft | 189 | Sakamoto, Taiga (1528) | Lost 0-2 | -231779 |
| top | average opponent: 1536record: 8-5 | new rating: 1779 | ||
| Grand Prix Shizuoka 2015 (KTK limited) | starting rating: 1677 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 978 | Kawano, Hiroki (1470) | Lost 1-2 | -221655 |
| 2sealed | 927 | Takamura, Morihiko (1536) | Draw 1-1 | -21653 |
| 3sealed | 1047 | Suzuki, Keisuke (1498) | Won 2-1 | +151668 |
| 4sealed | 933 | Moriya, Erika (1531) | Won 2-0 | +161684 |
| 5sealed | 834 | Hirano, Aimi (1520) | Won 2-1 | +151699 |
| 6sealed | 750 | Tomomizu, Takuya (1458) | Won 2-0 | +141713 |
| 7sealed | 688 | Yoshihara, Yamato (1624) | Won 2-0 | +161729 |
| 8sealed | 655 | Abe, Yuya (1571) | Won 2-0 | +151744 |
| 9sealed | 627 | Kousaka, Shinichi (1565) | Won 2-0 | +151759 |
| 10draft | 77 | Aoki, Takuya (1618) | Won 2-0 | +151774 |
| 11draft | 47 | Harane, Kenta (1618) | Lost 1-2 | -211753 |
| 12draft | 71 | Hanawa, Atsushi (1517) | Won 2-0 | +141767 |
| 13draft | 17 | Sugiyama, Yuya (1931) | Lost 0-2 | -151752 |
| 14draft | 107 | Saegusa, Nobuyuki (1621) | Won 2-0 | +161768 |
| 15draft | 34 | Matsubara, Ichiro (1732) | Won 2-1 | +171785 |
| top | average opponent: 1587record: 11-3-1 | new rating: 1785 | ||
| Grand Prix Shizuoka 2013 (THS standard) | starting rating: 1698 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 682 | Inoue, Yusuke (1500) | Lost 1-2 | -211677 |
| 2standard | 753 | Ookawa, Takumi (1483) | Lost 0-2 | -221655 |
| 3standard | 905 | Yokoyama, Kento (1347) | Won 2-0 | +131668 |
| 4standard | 799 | Hino, Yoshiaki (1484) | Won 2-0 | +141682 |
| 5standard | 747 | Obata, Maiko (1468) | Won 2-1 | +141696 |
| 6standard | 708 | Takeda, Harunobu (1614) | Lost 1-2 | -191677 |
| top | average opponent: 1483record: 3-3 | new rating: 1677 | ||
| Grand Prix Yokohama 2012 (modern) | starting rating: 1700 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 179 | Yonezawa, Musashi (1500) | Lost 0-2 | -221678 |
| 2modern | 427 | Yamato M., (1479) | Won 2-1 | +151693 |
| 3modern | 366 | Mayaguchi, Masaru (1475) | Won 2-1 | +141707 |
| 4modern | 358 | Ebitani, Keisuke (1532) | Won 2-1 | +141721 |
| 5modern | 262 | Higuchi, Akashi (1524) | Won 2-1 | +151736 |
| 6modern | 128 | Endo, Ryota (1877) | Lost 1-2 | -161720 |
| 7modern | 194 | Ohori, Akihito (1477) | Lost 1-2 | -221698 |
| top | average opponent: 1552record: 4-3 | new rating: 1698 | ||
| Grand Prix Kobe 2012 (DKA limited) | starting rating: 1715 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 277 | Ohmoto, Masaya (1500) | Won 2-1 | +141729 |
| 2sealed | 10 | Moriya, Jun (1766) | Won 2-0 | +181747 |
| 3sealed | 34 | Ishida, Yuuichi (1600) | Won 2-1 | +161763 |
| 4sealed | 48 | Shiraishi, Masaharu (1596) | Lost 0-2 | -211742 |
| 5sealed | 160 | Carr, Ezra (1563) | Lost 0-2 | -221720 |
| 6sealed | 201 | Hiramatsu, Mamoru (1571) | Lost 0-2 | -201700 |
| top | average opponent: 1599record: 3-3 | new rating: 1700 | ||
| Grand Prix Okayama 2008 (ALA limited) | starting rating: 1729 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 44 | Iwasaki, Yuusuke (1885) | Lost 1-2 | -151714 |
| 5sealed | 109 | Yamaguchi, Yuuichi (1662) | Won 2-1 | +171731 |
| 6sealed | 185 | Yoshimori, Sho (1687) | Lost 1-2 | -191712 |
| 7sealed | 41 | Okude, Masato (1541) | Won 2-0 | +151727 |
| 8sealed | 1 | Ootsuka, Koutarou (2046) | Lost 1-2 | -121715 |
| top | average opponent: 1764record: 2-3 | new rating: 1715 | ||
| Grand Prix Kobe 2008 (Lorwyn block) | starting rating: 1736 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 125 | Shiraishi, Masaharu (1475) | Won 2-0 | +131749 |
| 3block | 121 | Sato, Kimihiko (1668) | Lost 1-2 | -191730 |
| 4block | 230 | Kimura, Toshio (1519) | Won 2-0 | +141744 |
| 5block | 166 | Omori, Ken'ichirou (1550) | Lost 1-2 | -221722 |
| 6block | 187 | Inoue, Junji (1584) | Won 2-1 | +161738 |
| 7block | 155 | Masuyama, Takuya (1442) | Won 2-0 | +131751 |
| 8block | 78 | Fujimori, Masayoshi (1547) | Lost 0-2 | -221729 |
| top | average opponent: 1541record: 4-3 | new rating: 1729 | ||
| Grand Prix Shizuoka 2008 (MOR standard) | starting rating: 1715 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 212 | Mori, Youhei (1518) | Won 2-0 | +151730 |
| 3standard | 53 | Ota, Keisuke (1584) | Won 2-1 | +151745 |
| 4standard | 81 | Kaneko, Masami (1879) | Won 2-1 | +211766 |
| 5standard | 24 | Ookawa, Yuusuke (1591) | Won 2-0 | +151781 |
| 6standard | 3 | Anan, Go (1754) | Won 2-1 | +171798 |
| 7standard | 266 | Kubota, Kenta (1696) | Lost 1-2 | -201778 |
| 8standard | 50 | Matsuki, Hitoshi (1614) | Lost 1-2 | -211757 |
| 9standard | 136 | Nomura, Shuji (1560) | Lost 1-2 | -211736 |
| top | average opponent: 1649record: 5-3 | new rating: 1736 | ||
| Grand Prix Kitakyushu 2007 (LRW limited) | starting rating: 1715 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 23 | Toyonaga, Yasuhiro (1518) | Won 2-1 | +141729 |
| 3sealed | 13 | Kunugi, Ryou (1407) | Won 2-1 | +131742 |
| 4sealed | 17 | Taniguchi, Manabu (1691) | Won 2-1 | +171759 |
| 5sealed | 9 | Kitazono, Kensuke (1581) | Lost 1-2 | -211738 |
| 6sealed | 32 | Okabayashi, Masanao (1582) | Lost 0-2 | -211717 |
| 7sealed | 54 | Shiki, Kazumasa (1880) | Lost 0-2 | -151702 |
| 8sealed | 61 | Watanabe, Kenji (1467) | Won 2-1 | +131715 |
| top | average opponent: 1589record: 4-3 | new rating: 1715 | ||
| Grand Prix Kyoto 2007 (PLC standard) | starting rating: 1590 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 210 | Hasegawa, Hironobu (1641) | Won 2-0 | +181608 |
| 3standard | 38 | Ino, Kentaro (1765) | Lost 0-2 | -151593 |
| 4standard | 112 | Kou, Changsu (1501) | Won 2-1 | +171610 |
| 5standard | 55 | Ookawa, Yuusuke (1536) | Won 2-0 | +161626 |
| 6standard | 100 | Hanyu, Yusuke (1532) | Won 2-0 | +171643 |
| 7standard | 44 | Matsushita, Masakazu (1742) | Won 2-0 | +191662 |
| 8standard | 35 | Fujimoto, Taichi (1719) | Won 2-0 | +191681 |
| 9standard | 5 | Ide, Katsuhiro (1662) | Lost 0-2 | -181663 |
| 10standard | 62 | Kurakami, Shun (1673) | Won 2-1 | +181681 |
| 11standard | 5 | Nomura, Masahiro (1599) | Lost 1-2 | -191662 |
| 12standard | 60 | Nakamura, Yuichiro (1601) | Draw 1-1 | -11661 |
| 13standard | 44 | Yokoi, Masaki (1772) | Won 2-1 | +201681 |
| 14standard | 25 | Naitou, Keisuke (1568) | Won 2-1 | +161697 |
| 15standard | 14 | Chen, Liang (1714) | Won 2-0 | +181715 |
| top | average opponent: 1645record: 10-3-1 | new rating: 1715 | ||
| Grand Prix Yamagata 2006 (TSP limited) | starting rating: 1648 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 11 | Hirose, Yuuki (1594) | Lost 1-2 | -191629 |
| 3sealed | 97 | Nishimaki, Akira (1572) | Lost 1-2 | -191610 |
| 4sealed | 121 | Mera, Kenichi (1465) | Lost 0-2 | -201590 |
| top | average opponent: 1544record: 0-3 | new rating: 1590 | ||
| Pro Tour Kobe 2006 (TSP draft) | starting rating: 1653 | |||
| round | table | opponent (rating) | result | Δrating |
| 1draft | 72 | Mechler, Kyle (1715) | Lost 1-2 | -171636 |
| 2draft | 116 | Kurashima, Kazuki (1441) | Lost 1-2 | -211615 |
| 3draft | 28 | Alcaraz, Aniol (1798) | Won 2-0 | +211636 |
| 4draft | 44 | Correia, Kevin (1517) | Won 2-1 | +161652 |
| 5draft | 5 | Hansen, Matt (1574) | Lost 1-2 | -191633 |
| 6draft | 21 | Foster, Brian (1498) | Won 2-0 | +151648 |
| top | average opponent: 1591record: 3-3 | new rating: 1648 | ||
| Grand Prix Hiroshima 2006 (CSP limited) | starting rating: 1665 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 92 | Nakagawa, Yukihiro (1585) | Won 2-1 | +161681 |
| 3sealed | 15 | Tominaga, Mario (1473) | Lost 1-2 | -211660 |
| 4sealed | 93 | Omori, Tomoaki (1711) | Lost 0-2 | -171643 |
| 5sealed | 124 | Yamauchi, Takehiro (1508) | Won 2-1 | +151658 |
| 6sealed | 101 | Hamada, Akira (1520) | Won 2-1 | +161674 |
| 7sealed | 13 | Anan, Kazuyoshi (1545) | Lost 0-2 | -211653 |
| top | average opponent: 1557record: 3-3 | new rating: 1653 | ||
| Grand Prix Kitakyushu 2005 (extended) | starting rating: 1668 | |||
| round | table | opponent (rating) | result | Δrating |
| 3extended | 23 | Nagaoka, Kazunori (1554) | Won 2-0 | +151683 |
| 4extended | 4 | Morofuji, Takuma (1657) | Draw 1-1 | 01683 |
| 5extended | 23 | Tsai, Chih-Chun (1562) | Won 2-1 | +161699 |
| 6extended | 12 | Takahashi, Yuta (1752) | Won 2-0 | +191718 |
| 7extended | 6 | Taniguchi, Manabu (1596) | Lost 1-2 | -201698 |
| 8extended | 17 | Kudo, Koichi (1634) | Won 2-1 | +161714 |
| 9extended | 8 | Oiso, Masashi (2167) | Lost 1-2 | -101704 |
| 10extended | 17 | Kinoshita, Tomoya (1525) | Lost 1-2 | -211683 |
| 11extended | 22 | Kai, Tsubasa (1624) | Won 2-0 | +171700 |
| 12extended | 29 | Murata, Shouta (1586) | Lost 1-2 | -201680 |
| 13extended | 19 | Bandou, Junichirou (1851) | Lost 0-2 | -151665 |
| top | average opponent: 1682record: 5-5-1 | new rating: 1665 | ||
| Grand Prix Niigata 2005 (Kamigawa block) | starting rating: 1605 | |||
| round | table | opponent (rating) | result | Δrating |
| 3block | 15 | Horikawa, Hideaki (1518) | Won 2-0 | +171622 |
| 4block | 7 | Mizutani, Naoki (1660) | Lost 1-2 | -181604 |
| 5block | 56 | Nikkuni, Fumihito (1660) | Won 2-1 | +191623 |
| 6block | 54 | Satou, Dai (1648) | Won 2-0 | +191642 |
| 7block | 25 | Yamamoto, Kentaro (1724) | Won 2-1 | +191661 |
| 8block | 15 | Okada, Wataru (1761) | ID | 01661 |
| 9block | 20 | Takasugi, Ryouta (1544) | Won 2-1 | +161677 |
| 10block | 13 | Saito, Tomoharu (1905) | Lost 0-2 | -141663 |
| 11block | 20 | Shimada, Masatake (1692) | Won 2-0 | +191682 |
| 12block | 14 | Ishida, Itaru (2002) | Lost 1-2 | -121670 |
| 13block | 24 | Tomita, Shuntarou (1672) | Lost 1-2 | -181652 |
| 14block | 24 | Yasuda, Masahiro (1538) | Won 2-1 | +161668 |
| top | average opponent: 1694record: 7-4-1 | new rating: 1668 | ||
| Grand Prix Matsuyama 2005 (BOK limited) | starting rating: 1473 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 105 | Itou, Kouhei (1500) | Won 2-0 | +181491 |
| 2sealed | 93 | Matsuura, Kentarou (1518) | Won 2-0 | +191510 |
| 3sealed | 61 | Sutou, Takuo (1706) | Won 2-0 | +211531 |
| 4sealed | 8 | Ueno, Kazuki (1803) | Won 2-0 | +231554 |
| 5sealed | 5 | Yanagi, Hiroki (1637) | Won 2-1 | +201574 |
| 6sealed | 1 | Saitou, Kotatsu (1520) | Won 2-1 | +171591 |
| 7sealed | 5 | Iizuka, Shun (1724) | Won 2-0 | +201611 |
| 8sealed | 2 | Miura, Hiroyuki (1598) | Draw 1-1 | 01611 |
| 9draft | 2 | Nakamura, Shuhei (2045) | Lost 0-2 | -111600 |
| 10draft | 2 | Hirabayashi, Kazuya (2027) | Won 2-0 | +261626 |
| 11draft | 1 | Asahara, Akira (2004) | Lost 0-2 | -121614 |
| 12draft | 15 | Wakisaka, Yuusuke (1608) | Lost 0-2 | -181596 |
| 13draft | 6 | Shimura, Ichirou (1930) | Lost 0-2 | -121584 |
| 14draft | 2 | Furukawa, Ken'ichi (1778) | Won 2-0 | +211605 |
| top | average opponent: 1743record: 9-4-1 | new rating: 1605 | ||
| Grand Prix Nagoya 2004 (5DN standard) | starting rating: 1477 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 49 | Chiba, Shun (1599) | Won 2-1 | +201497 |
| 4standard | 69 | Kaji, Tomohiro (1772) | Lost 0-2 | -131484 |
| 5standard | 185 | Yamaguchi, Yuuichi (1468) | Won 2-0 | +181502 |
| 6standard | 70 | Senou, Yoshiyuki (1602) | Lost 0-2 | -161486 |
| 7standard | 183 | Hassaku, Jinpei (1765) | Lost 1-2 | -131473 |
| top | average opponent: 1641record: 2-3 | new rating: 1473 | ||
| Grand Prix Okayama 2004 (extended) | starting rating: 1476 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 93 | Kawahara, Takayuki (1447) | Lost 1-2 | -191457 |
| 3extended | 90 | Sugama, Hideichi (1509) | Lost 0-2 | -171440 |
| 4extended | 139 | Miyake, Takaaki (1361) | Won 2-0 | +171457 |
| 5extended | 120 | Adachi, Shingo (1615) | Won 2-0 | +201477 |
| 6extended | 72 | Toriumi, Takashi (1355) | Won 2-0 | +161493 |
| 7extended | 77 | Kozakai, Yukio (1598) | Lost 0-2 | -161477 |
| top | average opponent: 1481record: 3-3 | new rating: 1477 | ||
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 3block | 14 | Saitou, Takahiro (1621) | Lost 1-2 | -161488 |
| 4block | 187 | Nakamura, Yuusuke (1575) | Won 2-0 | +201508 |
| 5block | 102 | Takeuchi, Hidehito (1545) | Won 2-0 | +181526 |
| 6block | 74 | Uchida, Takuya (1619) | Lost 1-2 | -161510 |
| 7block | 77 | Ishii, Taisuke (1584) | Lost 1-2 | -171493 |
| 8block | 162 | Fujihira, Keizou (1509) | Lost 1-2 | -171476 |
| top | average opponent: 1575record: 2-4 | new rating: 1476 | ||
| Grand Prix Kyoto 2003 (LGN limited) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 78 | Asada, Yuki (1483) | Lost 0-2 | -181465 |
| 2sealed | 253 | Koyama, Takuma (1482) | Won 2-0 | +181483 |
| 3sealed | 122 | Ishii, Hayato (1505) | Lost 1-2 | -181465 |
| 4sealed | 204 | Miyako, Takahiro (1483) | Won 2-1 | +191484 |
| 5sealed | 162 | Muto, Mitsutoshi (1502) | Won 2-1 | +181502 |
| 6sealed | 126 | Orihara, Jun (1576) | Won 2-0 | +191521 |
| 7sealed | 99 | Hirota, Yuzo (1546) | Lost 0-2 | -171504 |
| top | average opponent: 1511record: 4-3 | new rating: 1504 | ||
| Grand Prix Hiroshima 2003 (extended) | starting rating: 1534 | |||
| round | table | opponent (rating) | result | Δrating |
| 4extended | 30 | Komiyama, Hideki (1662) | Lost 1-2 | -151519 |
| 5extended | 50 | Toochika, Takayuki (1499) | Lost 1-2 | -191500 |
| 6extended | 71 | Kuraoka, Shintarou (1516) | Lost 1-2 | -171483 |
| top | average opponent: 1559record: 0-3 | new rating: 1483 | ||
| Grand Prix Sapporo 2002 (Odyssey block) | starting rating: 1553 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 30 | Satou, Tsubasa (1451) | Won 2-0 | +161569 |
| 3block | 31 | Kawasaki, Hiroshi (1608) | Lost 1-2 | -171552 |
| 4block | 70 | Sato, Naoshi (1519) | Won 2-0 | +171569 |
| 5block | 41 | Kobayashi, Hideki (1701) | Lost 1-2 | -151554 |
| 6block | 103 | Inui, Yuta (1517) | Won 2-0 | +171571 |
| 7block | 43 | Yamazaki, Hiroyuki (1564) | Lost 1-2 | -181553 |
| 8block | 104 | Hisaki, Yuu (1523) | Lost 0-2 | -191534 |
| top | average opponent: 1555record: 3-4 | new rating: 1534 | ||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 83 | Ida, Soichiro (1500) | Lost 0-2 | -181482 |
| 2block | 496 | Kawai, Daisuke (1482) | Won 2-0 | +181500 |
| 3block | 520 | Tada, Masashi (1499) | Lost 1-2 | -181482 |
| 4block | 466 | Furuta, Rikimaru (1482) | Won 2-0 | +181500 |
| 5block | 397 | Morita, Shunichiro (1500) | Won 2-0 | +181518 |
| 6block | 221 | Matsumura, Takuya (1518) | Won 2-1 | +181536 |
| 7block | 183 | Nakai, Fuyuki (1520) | Won 2-0 | +181554 |
| 8block | 103 | Takahashi, Satoshi 2 (1538) | Won 2-0 | +171571 |
| 9block | 60 | Kurihara, Tomo (1552) | Lost 0-2 | -181553 |
| top | average opponent: 1510record: 6-3 | new rating: 1553 | ||