Kosaka, Kazune
Current rating: 2122 (#16)
Record: 50-31 (GP) / 62-33-3 (professional)
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
| Regional Championships Aichi 2023 (pioneer) | starting rating: 2186 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 5 | Tase, Yuya (1575) | Lost 1-2 | -282158 |
| 2pioneer | 94 | Wada, Kazumasa (1724) | Won 2-1 | +112169 |
| 3pioneer | 38 | Park, Hyung Joon (1512) | Won 2-1 | +72176 |
| 4pioneer | 41 | Terasawa, Yu (1687) | Lost 0-2 | -262150 |
| 5pioneer | 77 | Egeyama, Tomoki (1536) | Lost 1-2 | -282122 |
| top | average opponent: 1607record: 2-3 | new rating: 2122 | ||
| World Championship XXIX (mixed) | starting rating: 2079 | |||
| round | table | opponent (rating) | result | Δrating |
| 1draft | 31 | Sears, Isaac (2012) | Won 2-1 | +172096 |
| 2draft | 26 | Dominguez, Martin Sebastian (1984) | Won 2-1 | +162112 |
| 3draft | 3 | Tamblyn, Mitchell (2067) | Lost 0-2 | -192093 |
| 4standard | 23 | Sui, Dong (1812) | Lost 0-2 | -232070 |
| 5standard | 19 | Takahashi, Yuta (1959) | Won 2-1 | +162086 |
| 6standard | 20 | Edel, Willy (1912) | Won 2-0 | +152101 |
| 7standard | 15 | Schlesinger, Bradley (1849) | Won 2-0 | +132114 |
| 8draft | 3 | Mechin, Thomas (1899) | Lost 1-2 | -222092 |
| 9draft | 14 | Davis, Jim (2052) | Won 2-0 | +182110 |
| 10draft | 9 | Von Stange, Alex (1891) | Won 2-1 | +142124 |
| 11standard | 7 | Ferber, Chris (2096) | Won 2-1 | +172141 |
| 12standard | 2 | Gareau, Philippe (1995) | Won 2-0 | +152156 |
| 13standard | 1 | Takahama, Ken (1932) | Won 2-0 | +142170 |
| Qstandard | Edel, Willy (2003) | Won 3-1 | +152185 | |
| Sstandard | Nielsen, Simon (2314) | Won 3-0 | +212206 | |
| Fstandard | Depraz, Jean-Emmanuel (2103) | Lost 0-3 | -202186 | |
| top | average opponent: 1992record: 12-4 | new rating: 2186 | ||
| Pro Tour Lord of the Rings (modern) | starting rating: 1961 | |||
| round | table | opponent (rating) | result | Δrating |
| 1draft | 77 | Sun, Chuan (1949) | Won 2-0 | +181979 |
| 2draft | 37 | Santos, Bernardo (1777) | Won 2-0 | +151994 |
| 3draft | 43 | escalante, josue (1620) | Lost 1-2 | -251969 |
| 4modern | 64 | Guzman Vazquez, Jose Antonio (1632) | Won 2-1 | +121981 |
| 5modern | 40 | Kowalczuk, Wojciech (1852) | Won 2-1 | +161997 |
| 6modern | 17 | Potter, Jack (1740) | Won 2-1 | +132010 |
| 7modern | 5 | hongchen, jiao (1709) | Won 2-1 | +132023 |
| 8modern | 3 | Smith, Robert RC (2005) | Won 2-0 | +182041 |
| 9draft | 22 | Dominguez, Martin Sebastian (1993) | Lost 1-2 | -192022 |
| 10draft | 64 | Kiihne, Zachary (2013) | Won 2-0 | +182040 |
| 11draft | 22 | Calcano, Christian (1982) | Draw 1-1 | -22038 |
| 12modern | 4 | Inoue, Toru (2100) | Won 2-0 | +202058 |
| 13modern | 3 | Chen, Mingyang (1972) | Won 2-1 | +162074 |
| 14modern | 2 | Dominguez, Javier (2234) | Lost 1-2 | -152059 |
| 15modern | 4 | Orange, Gregory (2154) | Won 2-1 | +202079 |
| 16modern | 3 | Hayne, Alexander (2090) | Draw 1-1 | 02079 |
| top | average opponent: 1927record: 11-3-2 | new rating: 2079 | ||
| Regional Championships Chiba 2023 (pioneer) | starting rating: 1986 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 58 | Nishi, Hyuma (1761) | Won 2-0 | +142000 |
| 2pioneer | 45 | Akaike, Yo (1775) | Lost 1-2 | -221978 |
| 3pioneer | 50 | Yashiro, Kazuki (1804) | Won 2-1 | +141992 |
| 4pioneer | 31 | Mizutani, Yosuke (1801) | Won 2-1 | +152007 |
| 5pioneer | 23 | Washimi, Kazuo (1715) | Lost 1-2 | -231984 |
| 6pioneer | 40 | Hayashi, Takatomo (1714) | Won 2-1 | +131997 |
| 7pioneer | 32 | Kawata, Kazuki (1534) | Won 2-1 | +102007 |
| 8pioneer | 17 | Cho, Jae Seok (1641) | Lost 1-2 | -241983 |
| 9pioneer | 22 | Terasawa, Kazuya (1798) | Lost 0-2 | -221961 |
| top | average opponent: 1727record: 5-4 | new rating: 1961 | ||
| Pro Tour March of the Machine (MOM standard) | starting rating: 1950 | |||
| round | table | opponent (rating) | result | Δrating |
| 1draft | 116 | Yakobina, Matthew (1659) | Won 2-0 | +131963 |
| 2draft | 39 | Fernandes, Patrick (2066) | Draw 1-1 | +21965 |
| 3draft | 30 | Van Vaals, Michael (1844) | Lost 0-2 | -211944 |
| 4standard | 62 | Yada, Kazuki (1834) | Won 2-0 | +161960 |
| 5standard | 40 | Kamo, Riki (1926) | Lost 0-2 | -181942 |
| 6standard | 63 | Maxson, Gabriel (1829) | Won 2-1 | +161958 |
| 7standard | 41 | Vos, Brent (2025) | Won 2-0 | +191977 |
| 8standard | 30 | Gareau, Philippe (1974) | Won 2-1 | +181995 |
| 9draft | 24 | Fernandes, Patrick (2082) | Won 2-1 | +192014 |
| 10draft | 24 | Milechman, Daniel (1954) | Won 2-1 | +172031 |
| 11draft | 5 | Goetschel, Daniel (2035) | Lost 0-2 | -182013 |
| 12standard | 16 | Hitchcock, Steven (1716) | Won 2-1 | +132026 |
| 13standard | 10 | Mendoza, Norbie (1785) | Won 2-0 | +142040 |
| 14standard | 7 | Nakamura, Shuhei (2055) | Lost 1-2 | -182022 |
| 15standard | 11 | Perrini, Pedro (1931) | Lost 1-2 | -202002 |
| 16standard | 17 | Orange, Gregory (2063) | Lost 0-2 | -161986 |
| top | average opponent: 1924record: 9-6-1 | new rating: 1986 | ||
| Regional Championships Yokohama 2023 (ONE standard) | starting rating: 1969 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 90 | Inoue, Takuto (1534) | Won 2-0 | +101979 |
| 2standard | 18 | Ebitani, Keisuke (1742) | Lost 1-2 | -221957 |
| 3standard | 34 | Kainuma, Tsuyoshi (1513) | Won 2-0 | +111968 |
| 4standard | 43 | Yamada, Yosuke (1744) | Won 2-0 | +141982 |
| 5standard | 27 | Itou, Motoaki (2009) | Lost 1-2 | -181964 |
| 6standard | 44 | Satou, Fumihiko (1565) | Won 2-0 | +111975 |
| 7standard | 31 | Satou, Fumiaki (1556) | Lost 0-2 | -251950 |
| top | average opponent: 1666record: 4-3 | new rating: 1950 | ||
| Pro Tour Phyrexia (pioneer) | starting rating: 1861 | |||
| round | table | opponent (rating) | result | Δrating |
| 1draft | 67 | Kiihne, Zachary (2009) | Won 2-1 | +211882 |
| 2draft | 32 | Kono, Toru (1799) | Won 2-1 | +161898 |
| 3draft | 17 | Eberhard, Samuel (1833) | Won 2-0 | +171915 |
| 4pioneer | 11 | Del Pivo, Marco (1931) | Won 2-0 | +181933 |
| 5pioneer | 4 | Segou, Kenji (1857) | Won 2-1 | +171950 |
| 6pioneer | 3 | Madsen, Benton (1860) | Lost 0-2 | -201930 |
| 7pioneer | 3 | Santos, Andre (1770) | Lost 1-2 | -211909 |
| 8pioneer | 13 | Crispino, Paolo (1836) | Won 2-0 | +171926 |
| 9draft | 36 | Di Napoli, Jacopo (1829) | Lost 0-2 | -201906 |
| 10draft | 55 | Kumagai, Riku (2103) | Won 2-1 | +221928 |
| 11draft | 37 | Ramboa, Thierry (2089) | Won 2-1 | +211949 |
| 12pioneer | 11 | Nassif, Gabriel (2083) | Lost 1-2 | -161933 |
| 13pioneer | 17 | Lossett, Joe (2003) | Lost 1-2 | -171916 |
| 14pioneer | 24 | Kyogoku, Kyosuke (1900) | Won 2-1 | +181934 |
| 15pioneer | 17 | Di Napoli, Jacopo (1838) | Won 2-1 | +161950 |
| 16pioneer | 8 | Goetschel, Daniel (1976) | Won 2-0 | +191969 |
| top | average opponent: 1920record: 11-5 | new rating: 1969 | ||
| Regional Championships Aichi 2022 (pioneer) | starting rating: 1892 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 83 | Kawata, Kazuki (1463) | Won 2-0 | +101902 |
| 2pioneer | 22 | Saida, Toshihiro (2005) | Won 2-0 | +201922 |
| 3pioneer | 8 | Kumagai, Riku (2101) | Lost 0-2 | -151907 |
| 4pioneer | 33 | Yukuhiro, Ken (1827) | Won 2-1 | +171924 |
| 5pioneer | 7 | Maeda, Yusuke (1536) | Won 2-1 | +111935 |
| 6pioneer | 7 | Inui, Takashi (1791) | Lost 1-2 | -201915 |
| 7pioneer | 17 | Kobayashi, Ryohei (1680) | Lost 0-2 | -231892 |
| 8pioneer | 32 | Matsuura, Takumi (1843) | Lost 1-2 | -181874 |
| 9pioneer | 32 | Yoshimori, Sho (1596) | Won 2-0 | +131887 |
| 10pioneer | 23 | Kato, Hiromu (1441) | Lost 1-2 | -261861 |
| top | average opponent: 1728record: 5-5 | new rating: 1861 | ||
| New Capenna Championship (MTGA mixed) | starting rating: 1793 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 74 | Dong, Zhong (1778) | Won 2-0 | +181811 |
| 2standard | 29 | Romao, Carlos (1990) | Won 2-1 | +211832 |
| 3standard | 25 | Sato, Keisuke (1895) | Won 2-0 | +191851 |
| 4historic | 7 | Mori, Noriyuki (1942) | Won 2-0 | +201871 |
| 5historic | 3 | Schuetz, Stefan (2074) | Lost 0-2 | -141857 |
| 6historic | 21 | Ooyama, Shinnosuke (1655) | Won 2-1 | +141871 |
| 7historic | 7 | Yasooka, Shota (2250) | Lost 0-2 | -111860 |
| 8standard | 21 | Zhang, Rei (1512) | Lost 1-2 | -251835 |
| 9standard | 39 | Singh, Noor (1731) | Lost 1-2 | -191816 |
| 10standard | 37 | Koizumi, Yuma (1932) | Won 2-0 | +201836 |
| 11standard | 23 | Huschenbeth, Arne (2079) | Won 2-0 | +221858 |
| 12historic | 26 | Duke, Reid (2028) | Won 2-0 | +211879 |
| 13historic | 15 | Honnay, Lukas (1801) | Lost 0-2 | -191860 |
| 14historic | 25 | Di Napoli, Jacopo (1803) | Won 2-1 | +171877 |
| 15historic | 17 | Stube, Martin (1715) | Won 2-1 | +151892 |
| top | average opponent: 1879record: 10-5 | new rating: 1892 | ||
| Innistrad Championship (MTGA mixed) | starting rating: 1710 | |||
| round | table | opponent (rating) | result | Δrating |
| 1historic | 32 | Moon, Jason (1612) | Won 2-0 | +161726 |
| 2historic | 14 | Antons-Jones, Felix (1556) | Won 2-0 | +151741 |
| 3historic | 22 | Damo da Rosa, Paulo Vitor (2140) | Lost 0-2 | -111730 |
| 4standard | 56 | Saarinen, Olli (1887) | Lost 0-2 | -151715 |
| 5standard | 66 | Braun-Duin, Brian (1768) | Lost 1-2 | -171698 |
| 6standard | 77 | Nieke, Jonas (1897) | Won 2-1 | +211719 |
| 7standard | 47 | Almeida, Marcela (1664) | Won 2-1 | +171736 |
| 8historic | 31 | Nassif, Gabriel (2061) | Lost 1-2 | -121724 |
| 9historic | 56 | Dang, Martin (1915) | Won 2-0 | +211745 |
| 10historic | 47 | Techarattanaprasert, Mongkol (1894) | Won 2-1 | +211766 |
| 11historic | 23 | Kuisma, Matti (2073) | Won 2-1 | +231789 |
| 12standard | 21 | Sombutsiri, Sarutt (1599) | Lost 1-2 | -211768 |
| 13standard | 29 | Hayne, Alexander (1917) | Lost 0-2 | -151753 |
| 14standard | 41 | Levy, Raphael (2037) | Won 2-0 | +231776 |
| 15standard | 38 | Karamchandani, Arya (1746) | Won 2-1 | +171793 |
| top | average opponent: 1851record: 9-6 | new rating: 1793 | ||
| Zendikar Rising Championship (MTGA mixed) | starting rating: 1773 | |||
| round | table | opponent (rating) | result | Δrating |
| 1historic | 47 | Nelson, Brad (2106) | Lost 0-2 | -131760 |
| 2historic | 68 | Cuneo, Andrew (1895) | Lost 0-2 | -151745 |
| 3historic | 73 | Hohns, Bryan (1951) | Lost 0-2 | -141731 |
| 4standard | 88 | Gennari, Justin (1569) | Lost 1-2 | -211710 |
| top | average opponent: 1880record: 0-4 | new rating: 1710 | ||
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1836 | |||
| round | table | opponent (rating) | result | Δrating |
| 3pioneer | 165 | Sasaki, Kensuke (1683) | Lost 1-2 | -211815 |
| 4pioneer | 275 | Futamata, Yojiro (1804) | Lost 1-2 | -181797 |
| 5pioneer | 498 | Shinbo, Soutaro (1424) | Lost 1-2 | -241773 |
| top | average opponent: 1637record: 0-3 | new rating: 1773 | ||
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1762 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 366 | Imanaka, Shinya (1545) | Lost 0-2 | -221740 |
| 3standard | 630 | Sakai, Toshinori (1578) | Won 2-0 | +151755 |
| 4standard | 328 | Nishiguchi, Yoshinori (1306) | Won 2-1 | +101765 |
| 5standard | 403 | Nakamura, Yusuke9351 (1493) | Won 2-1 | +131778 |
| 6standard | 78 | Kurosawa, Yuuki7831 (1500) | Won 2-1 | +131791 |
| 7standard | 99 | Ito, Keita (1529) | Won 2-1 | +141805 |
| 8standard | 18 | Ikeda, Hiroaki (1749) | Won 2-1 | +171822 |
| 9standard | 32 | Amemiya, Kouhei (1616) | Won 2-0 | +141836 |
| 10standard | 18 | Yamane, Naoto (1792) | Won 2-1 | +171853 |
| 11standard | 7 | Yamamura, Yuma (1819) | Lost 0-2 | -181835 |
| 12standard | 22 | Watanabe, Kouhei 8114 (1674) | Won 2-1 | +151850 |
| 13standard | 21 | Yada, Kazuki (2046) | Won 2-0 | +211871 |
| 14standard | 10 | Kumagai, Riku (2126) | Lost 1-2 | -131858 |
| 15standard | 23 | Inui, Takashi (1652) | Lost 0-2 | -221836 |
| top | average opponent: 1673record: 10-4 | new rating: 1836 | ||
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1666 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 325 | Suzuki, Kazushige (1743) | Lost 1-2 | -161650 |
| 4sealed | 298 | Sakuma, Toshimitsu (1727) | Won 2-0 | +191669 |
| 5sealed | 419 | Bergelin, Erik (1518) | Lost 0-2 | -211648 |
| 6sealed | 359 | Maruyama, Tomoyuki (1518) | Won 2-0 | +161664 |
| 7sealed | 481 | Suzuki, Takuya 1104 (1464) | Won 2-0 | +141678 |
| 8sealed | 283 | Yi, Sanghee (1704) | Won 2-1 | +191697 |
| 9sealed | 142 | Amemiya, Kouhei (1473) | Won 2-0 | +141711 |
| 10draft | 220 | Shimizu, Ryouta (1709) | Won 2-1 | +181729 |
| 11draft | 72 | Uchino, Jun (1683) | Won 2-1 | +171746 |
| 12draft | 24 | Hasegawa, Kazunari (1849) | Won 2-1 | +201766 |
| 13draft | 204 | Sakata, Naoya (1641) | Lost 0-2 | -201746 |
| 14draft | 124 | Shima, Junichirou (1639) | Won 2-1 | +161762 |
| 15draft | 7 | Tsuruta, Tomoya (1655) | ID | 01762 |
| top | average opponent: 1640record: 9-3-1 | new rating: 1762 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1681 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 224 | Arai, Makoto (1566) | Won 2-0 | +161697 |
| 3standard | 531 | Kamada, Yuuki (1472) | Lost 0-2 | -221675 |
| 4standard | 789 | Kurosawa, Yuuki7831 (1377) | Won 2-0 | +131688 |
| 5standard | 456 | Chiba, Takato (1759) | Won 2-0 | +191707 |
| 6standard | 371 | Yamane, Naoto (1565) | Lost 1-2 | -211686 |
| 7standard | 385 | Inoue, Takuto (1561) | Lost 1-2 | -201666 |
| top | average opponent: 1550record: 3-3 | new rating: 1666 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 629 | Matsui, Ryosuke (1500) | Won 2-0 | +181518 |
| 2standard | 196 | Takano, Hayato (1560) | Won 2-0 | +191537 |
| 3standard | 63 | Endo, Takatomo (1383) | Lost 1-2 | -211516 |
| 4standard | 621 | Nakata, Yuusaku (1544) | Won 2-1 | +181534 |
| 5standard | 440 | Sawada, Tetsushi (1671) | Won 2-1 | +211555 |
| 6standard | 238 | Uraya, Masamitsu (1526) | Won 2-1 | +171572 |
| 7standard | 81 | Yamaguchi, Yu (1532) | Won 2-1 | +181590 |
| 8standard | 31 | Fukudome, Yuu (1665) | Lost 1-2 | -171573 |
| 9standard | 250 | Kasahara, Koichi (1523) | Won 2-0 | +171590 |
| 10standard | 90 | Hasegawa, Atusi (1474) | Won 2-1 | +161606 |
| 11standard | 74 | Murata, Toshiaki (1911) | Won 2-0 | +231629 |
| 12standard | 51 | Horikoshi, Takayuki (1762) | Lost 0-2 | -151614 |
| 13standard | 92 | Tsuchiya, Hideaki (1827) | Won 2-1 | +221636 |
| 14standard | 77 | Nanjo, Masashi (1892) | Won 2-1 | +221658 |
| 15standard | 52 | Shigehara, Toshinori (1934) | Won 2-0 | +231681 |
| top | average opponent: 1647record: 12-3 | new rating: 1681 | ||