Kase, Koichi
Current rating: 1545
Record: 41-43-2
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1565 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 313 | Suzuki, Towa (1562) | Lost 1-2 | -181547 |
| 2sealed | 723 | Yamada, Tsutomu (1504) | Won 2-0 | +171564 |
| 3sealed | 833 | Matsuki, Ryusuke (1501) | Lost 1-2 | -191545 |
| top | average opponent: 1522record: 1-2 | new rating: 1545 | ||
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1565 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 164 | Hata, Hiromi (1393) | Lost 1-2 | -211544 |
| 2standard | 691 | Takahashi, Katsuhisa (1441) | Won 2-1 | +161560 |
| 3standard | 836 | Murakami, Yuki (1836) | Won 2-1 | +231583 |
| 4standard | 449 | Nakajima, Masato (1456) | Won 2-1 | +161599 |
| 5standard | 192 | Mukuno, Yuuji (1717) | Lost 1-2 | -161583 |
| 6standard | 491 | Tanaka, Hayato (1570) | Lost 1-2 | -181565 |
| top | average opponent: 1569record: 3-3 | new rating: 1565 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1571 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 254 | Iwabuchi, Daisuke (1443) | Won 2-0 | +151586 |
| 2standard | 355 | Kambe, Kouichi (1522) | Lost 1-2 | -191567 |
| 3standard | 850 | Okada, Masakazu (1491) | Won 2-1 | +171584 |
| 4standard | 561 | Ichikawa, Hideyuki (1547) | Lost 1-2 | -191565 |
| top | average opponent: 1501record: 2-2 | new rating: 1565 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1491 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 113 | Fukuhara, Asumu (1439) | Won 2-0 | +181509 |
| 2sealed | 520 | Taira, Kentaro (1519) | Won 2-0 | +181527 |
| 3sealed | 174 | Matsuyama, Ryousuke (1612) | Lost 0-2 | -171510 |
| 4sealed | 763 | Kan, Kensei (1487) | Won 2-0 | +181528 |
| 5sealed | 472 | Hattori, Kazuki (1554) | Lost 0-2 | -181510 |
| 6sealed | 478 | Noge, Hayata (1614) | Won 2-1 | +201530 |
| 7sealed | 469 | Sezume, Akihiro (1505) | Won 2-0 | +181548 |
| 8sealed | 270 | Sano, Takumi (1394) | Won 2-1 | +151563 |
| 9sealed | 183 | Kobayashi, Kazutaka (1722) | Lost 0-2 | -151548 |
| 10draft | 712 | Oono, Seita (1585) | Lost 0-2 | -181530 |
| 11draft | 632 | Umeyama, Yuuichi (1613) | Won 2-1 | +201550 |
| 12draft | 703 | Morita, Yuuki (1572) | Won 2-1 | +181568 |
| 13draft | 579 | Karatsu, Yoshifumi (1646) | Lost 0-2 | -161552 |
| 15draft | 613 | Harashima, Kenichi (1592) | Won 2-1 | +191571 |
| top | average opponent: 1561record: 9-5 | new rating: 1571 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1489 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 694 | Oota, Ryou (1523) | Won 2-0 | +191508 |
| 2modern | 445 | Tsubochi, Keita (1520) | Won 2-0 | +181526 |
| 3modern | 212 | Mizutani, Yoshinobu (1446) | Lost 1-2 | -201506 |
| 4modern | 542 | Oomori, Shouhei (1457) | Won 2-0 | +181524 |
| 5modern | 570 | Kawakami, Takehito (1793) | Lost 0-2 | -141510 |
| 6modern | 492 | Matsumoto, Shohei (1480) | Lost 1-2 | -181492 |
| 7modern | 918 | Mihashi, Takanobu (1536) | Won 2-0 | +191511 |
| 8modern | 652 | Naka, Hidehiro (1445) | Lost 0-2 | -201491 |
| top | average opponent: 1525record: 4-4 | new rating: 1491 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1442 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 253 | Takahashi, Tomoyoshi (1464) | Won 2-0 | +181460 |
| 2standard | 504 | Yasunaka, Shinichi (1429) | Won 2-0 | +181478 |
| 3standard | 293 | Shimizu, Ryouta (1651) | Lost 0-2 | -151463 |
| 4standard | 447 | Makishita, Yamato (1494) | Lost 0-2 | -181445 |
| 5standard | 839 | Koyanagi, Takuya (1582) | Lost 1-2 | -151430 |
| 6standard | 1068 | Uematu, Shunta (1479) | Won 2-1 | +191449 |
| 7standard | 924 | Sugita, Wataru (1707) | Won 2-1 | +221471 |
| 8standard | 481 | Shimamura, Kazushige (1435) | Won 2-0 | +181489 |
| 9standard | 322 | Takayama, Kan (1631) | Won 2-0 | +201509 |
| 10standard | 203 | Yamada, Toshihiro (1708) | Won 2-0 | +221531 |
| 11standard | 229 | Saito, Toru (1643) | Lost 0-2 | -161515 |
| 12standard | 278 | Ogata, Syou (1697) | Won 2-1 | +211536 |
| 13standard | 245 | Murata, Toshiaki (1862) | Lost 1-2 | -121524 |
| 14standard | 250 | Shiba, Yoshimasa (1542) | Lost 0-2 | -181506 |
| 15standard | 268 | Maruoka, Tatsuya (1547) | Lost 1-2 | -171489 |
| top | average opponent: 1591record: 8-7 | new rating: 1489 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1405 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 234 | Narumi, Masaru (1425) | Lost 0-2 | -181387 |
| 2standard | 1000 | Uchida, Wataru (1531) | Won 2-1 | +211408 |
| 3standard | 1296 | Sakai, Hajime (1499) | Lost 1-2 | -171391 |
| 4standard | 1434 | Miyazaki, Yuhei (1486) | Won 2-0 | +201411 |
| 5standard | 968 | Yamamoto, Hiroki (1497) | Won 2-1 | +201431 |
| 6standard | 862 | Nakahara, Shuichi (1810) | Lost 1-2 | -121419 |
| 7standard | 947 | Mokudari, Masahiro (1467) | Won 2-1 | +191438 |
| 8standard | 623 | Tsuchida, Shinnosuke (1516) | Lost 0-2 | -171421 |
| 9standard | 721 | Nakata, Yuusaku (1563) | Won 2-1 | +211442 |
| top | average opponent: 1533record: 5-4 | new rating: 1442 | ||
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1412 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 508 | Ishii, Gou (1500) | Draw 1-1 | +11413 |
| 2standard | 573 | Kajiyama, Koutarou (1497) | Won 2-1 | +201433 |
| 3standard | 587 | Fujita, Gensho (1569) | Lost 1-2 | -161417 |
| 4standard | 808 | Ujike, Takanori (1501) | Lost 0-2 | -161401 |
| 5standard | 959 | Tadashi, Matsuo (1483) | Lost 1-2 | -171384 |
| 6standard | 916 | Itou, Tadashi (1435) | Draw 1-1 | +11385 |
| 7standard | 797 | Tsuda, Seiya (1463) | Won 2-1 | +201405 |
| top | average opponent: 1493record: 2-3-2 | new rating: 1405 | ||
| Grand Prix Kobe 2014 (modern) | starting rating: 1422 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 231 | Horiguchi, Kenichi (1524) | Lost 1-2 | -161406 |
| 2modern | 360 | Watanabe, Yuuichi (1438) | Lost 0-2 | -181388 |
| 3modern | 557 | Maeda, Takashi (1266) | Won 2-0 | +161404 |
| 4modern | 431 | Muraoka, Goro (1430) | Won 2-1 | +181422 |
| 5modern | 305 | Saijo, Yuichi (1534) | Won 2-1 | +211443 |
| 6modern | 284 | Mukuno, Yuuji (1670) | Lost 0-2 | -141429 |
| 7modern | 306 | Shirakihara, Ryuuichi (1484) | Lost 0-2 | -171412 |
| top | average opponent: 1478record: 3-4 | new rating: 1412 | ||
| Grand Prix Nagoya 2014 (BNG limited) | starting rating: 1413 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 789 | Tsuda, Mineyuki (1710) | Lost 1-2 | -121401 |
| 2sealed | 758 | Hanzawa, Hirofumi (1483) | Won 2-1 | +191420 |
| 3sealed | 802 | Smithberger, John (1502) | Won 2-0 | +201440 |
| 4sealed | 728 | Nakamura, Kouki (1376) | Won 2-0 | +161456 |
| 5sealed | 637 | Hamaguchi, Masakuni (1432) | Lost 1-2 | -181438 |
| 6sealed | 631 | Satou, Tsubasa (1535) | Lost 0-2 | -161422 |
| top | average opponent: 1506record: 3-3 | new rating: 1422 | ||
| Grand Prix Shizuoka 2013 (THS standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 252 | Hashimoto, Akio (1531) | Won 2-0 | +191519 |
| 2standard | 41 | Mori, Katsuhiro (1963) | Lost 0-2 | -111508 |
| 3standard | 261 | Hasegawa, Tsuguto (1449) | Lost 1-2 | -191489 |
| 4standard | 382 | Terajima, Kazuma (1430) | Lost 0-2 | -191470 |
| 5standard | 339 | Isayama, Yusuke (1557) | Lost 0-2 | -161454 |
| 6standard | 315 | Hirabayashi, Kazuki (1358) | Lost 0-2 | -201434 |
| 7standard | 279 | Inami, Yuuki (1295) | Lost 0-2 | -211413 |
| top | average opponent: 1512record: 1-6 | new rating: 1413 | ||