Yokumichi, Jun
Current rating: 1445
Record: 39-48-1
Grand Prix Kobe 2014Grand Prix Kyoto 2015Grand Prix Kobe 2015Grand Prix Nagoya 2016Grand Prix Tokyo 2016Grand Prix Chiba 2016Grand Prix Shizuoka 2017Grand Prix Kobe 2017Grand Prix Kyoto 2017Grand Prix Chiba 2018Grand Prix Kyoto 2019Grand Prix Yokohama 2019Grand Prix Chiba 2019Grand Prix Nagoya 2019Regional Championships Chiba 2023
| Regional Championships Chiba 2023 (pioneer) | starting rating: 1495 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 25 | Mori, Shotaro (1583) | Lost 0-2 | -171478 |
| 2pioneer | 97 | Sonoda, Yosuke (1591) | Lost 1-2 | -161462 |
| 3pioneer | 103 | Hitachi, Kyle (1511) | Lost 0-2 | -171445 |
| top | average opponent: 1562record: 0-3 | new rating: 1445 | ||
| Grand Prix Nagoya 2019 (ELD standard) | starting rating: 1509 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 144 | Nisi, Ryota (1445) | Lost 1-2 | -201489 |
| 3standard | 628 | Morita, Kazuki (1430) | Won 2-1 | +171506 |
| 4standard | 593 | Kimura, Minori (1480) | Won 2-1 | +181524 |
| 5standard | 196 | Ichimura, Yuji (1546) | Lost 0-2 | -181506 |
| 6standard | 498 | Ogura, Ryou (1870) | Lost 1-2 | -111495 |
| top | average opponent: 1554record: 2-3 | new rating: 1495 | ||
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1496 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 7 | Okada, Masakazu (1453) | Lost 0-2 | -191477 |
| 3sealed | 664 | Kawamura, Yusaku (1643) | Won 2-0 | +211498 |
| 4sealed | 654 | Yasu, Ryotaro (1651) | Won 2-1 | +211519 |
| 5sealed | 259 | Nishida, Makoto (1717) | Lost 1-2 | -141505 |
| 6sealed | 652 | Sato, Hikaru0478 (1619) | Won 2-1 | +201525 |
| 7sealed | 367 | Noge, Hayata (1620) | Lost 0-2 | -161509 |
| top | average opponent: 1617record: 3-3 | new rating: 1509 | ||
| Grand Prix Yokohama 2019 (modern) | starting rating: 1496 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 563 | Matsumoto, Shou (1417) | Won 2-0 | +161512 |
| 3modern | 266 | Shibayama, Hayato (1354) | Won 2-1 | +161528 |
| 4modern | 183 | Mutou, Masaya (1673) | Lost 1-2 | -161512 |
| 5modern | 304 | Kobayashi, Yuuki 9574 (1575) | Won 2-0 | +191531 |
| 6modern | 137 | Wang, Shensheng (1614) | Lost 0-2 | -161515 |
| 7modern | 359 | Arai, Tomoki (1492) | Lost 1-2 | -191496 |
| 8modern | 419 | Kitajima, Hiroyasu (1487) | Draw 1-1 | 01496 |
| top | average opponent: 1516record: 3-3-1 | new rating: 1496 | ||
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 496 | Takeuchi, Takaharu (1520) | Won 2-1 | +191485 |
| 3standard | 352 | Igarashi, Takuma (1604) | Lost 1-2 | -161469 |
| 4standard | 669 | Kadowaki, Tatsuya (1553) | Lost 1-2 | -161453 |
| 5standard | 501 | Higaki, Motohide (1532) | Won 2-1 | +191472 |
| 6standard | 609 | Kobayashi, Keita (1584) | Won 2-0 | +201492 |
| 7standard | 266 | Tanigawa, Futa (1576) | Won 2-0 | +201512 |
| 8standard | 179 | Tasugi, Keigo (1620) | Lost 1-2 | -161496 |
| top | average opponent: 1570record: 4-3 | new rating: 1496 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1477 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 166 | Takesue, Chikara (1780) | Lost 1-2 | -121465 |
| 3sealed | 1000 | Nakahashi, Yoshihiro (1373) | Lost 0-2 | -201445 |
| 4sealed | 930 | Hogaku, Shingo (1484) | Won 2-0 | +191464 |
| 5sealed | 786 | Matsuo, Yoshiyuki (1599) | Won 2-0 | +201484 |
| 6sealed | 512 | Maruyama, Nobuhiro (1487) | Lost 0-2 | -181466 |
| top | average opponent: 1545record: 2-3 | new rating: 1466 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1495 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 106 | Kuga, Takahiro (1520) | Lost 0-2 | -181477 |
| top | record: 0-1 | new rating: 1477 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1513 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 392 | Eto, Masahiro (1518) | Lost 0-2 | -181495 |
| top | record: 0-1 | new rating: 1495 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 191 | Murayama, Kyohei (1519) | Won 2-0 | +181516 |
| 3standard | 257 | Bandou, Junichirou (1776) | Won 2-0 | +231539 |
| 4standard | 127 | Yotsumoto, Yuki (1877) | Lost 1-2 | -121527 |
| 5standard | 442 | Shimizu, Syouta (1593) | Lost 0-2 | -171510 |
| 6standard | 491 | Dai, Xiangjun (1518) | Won 2-0 | +181528 |
| 7standard | 476 | Furukawa, Syun6268 (1520) | Lost 0-2 | -181510 |
| 8standard | 742 | Miyazaki, Toshiyuki (1519) | Won 2-0 | +181528 |
| 9standard | 435 | Mori, Takeshi (1663) | Lost 1-2 | -151513 |
| top | average opponent: 1623record: 4-4 | new rating: 1513 | ||
| Grand Prix Chiba 2016 (legacy) | starting rating: 1471 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 160 | Maruyama, Muneharu (1517) | Won 2-0 | +191490 |
| 3legacy | 328 | Brown, Eric (1690) | Lost 0-2 | -151475 |
| 4legacy | 479 | Chiba, Takato (1634) | Won 2-1 | +211496 |
| 5legacy | 516 | Izumi, Masaru (1607) | Won 2-1 | +201516 |
| 6legacy | 293 | Honda, Rintaro (1669) | Lost 1-2 | -151501 |
| 7legacy | 251 | Andou, Shuusuke (1591) | Won 2-1 | +201521 |
| 8legacy | 287 | Matsunaga, Koutarou (1563) | Lost 0-2 | -181503 |
| 9legacy | 399 | Okamoto, Jin (1758) | Won 2-1 | +231526 |
| 10legacy | 316 | Kakumae, Teruya (1894) | Lost 0-2 | -121514 |
| 11legacy | 311 | Ichitaka, Daichi (1520) | Lost 0-2 | -181496 |
| 12legacy | 309 | Kimura, Tarou (1556) | Won 2-0 | +201516 |
| 13legacy | 275 | Hirosawa, Yuuichirou (1543) | Lost 1-2 | -181498 |
| top | average opponent: 1628record: 6-6 | new rating: 1498 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1522 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 722 | Rokugawa, Youhei (1601) | Lost 0-2 | -171505 |
| 4standard | 851 | Morioka, Ryota (1488) | Lost 1-2 | -181487 |
| 5standard | 1039 | Chaen, Masaki (1429) | Won 2-1 | +171504 |
| 6standard | 967 | Sano, Kunihide (1664) | Lost 1-2 | -151489 |
| 7standard | 1092 | Taira, Masashi (1488) | Lost 1-2 | -181471 |
| top | average opponent: 1534record: 1-4 | new rating: 1471 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1491 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 199 | Watanabe, Yuta9087 (1500) | Won 2-0 | +181509 |
| 4sealed | 15 | Iguchi, Taisuke (1698) | Lost 0-2 | -141495 |
| 5sealed | 193 | Ohori, Akihito (1408) | Won 2-0 | +161511 |
| 6sealed | 260 | Sasaki, Yuusuke3592 (1518) | Won 2-0 | +181529 |
| 7sealed | 90 | Araki, Shota (1566) | Won 2-0 | +191548 |
| 8sealed | 37 | Hiyoshi, Daisuke (1590) | Lost 0-2 | -171531 |
| 9sealed | 184 | Sato, Keisuke (1672) | Won 2-0 | +201551 |
| 10draft | 316 | Suzuki, Ryohei (1566) | Won 2-0 | +191570 |
| 11draft | 361 | Sorakup, Aekarash (1736) | Lost 1-2 | -151555 |
| 12draft | 187 | Yanase, Kaname (1650) | Lost 1-2 | -171538 |
| 13draft | 36 | Kaneko, Masashi (1629) | Lost 0-2 | -161522 |
| top | average opponent: 1594record: 6-5 | new rating: 1522 | ||
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1468 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 680 | Chou, Takayuki (1603) | Lost 1-2 | -151453 |
| 2standard | 643 | Kamal, Ahmad Hilmi Mustaffa (1371) | Won 2-0 | +161469 |
| 3standard | 826 | Nakamura, Taro (1444) | Lost 1-2 | -181451 |
| 4standard | 910 | Kamikihara, Yusuke (1448) | Won 2-0 | +181469 |
| 5standard | 754 | Goto, Takashi (1487) | Won 2-1 | +181487 |
| 6standard | 716 | Gotou, Hiroaki (1680) | Won 2-0 | +211508 |
| 7standard | 383 | Matsuda, Issei (1548) | Lost 0-2 | -171491 |
| top | average opponent: 1512record: 4-3 | new rating: 1491 | ||
| Grand Prix Kyoto 2015 (legacy) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 827 | Maeda, Kouzo (1500) | Lost 1-2 | -171447 |
| 2legacy | 833 | Hashizume, Daisuke (1480) | Won 2-1 | +181465 |
| 3legacy | 791 | Tsukahara, Kazuto (1655) | Lost 0-2 | -141451 |
| 4legacy | 878 | Chiba, Shouhei (1427) | Won 2-0 | +171468 |
| 5legacy | 809 | Kagoi, Yuki (1446) | Won 2-1 | +181486 |
| 6legacy | 760 | Isurugi, Hideyuki (1507) | Lost 1-2 | -181468 |
| top | average opponent: 1502record: 3-3 | new rating: 1468 | ||
| Grand Prix Kobe 2014 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 169 | Takamisawa, Yuki (1500) | Won 2-1 | +181518 |
| 2modern | 143 | Omi, Tatsuya (1512) | Lost 1-2 | -181500 |
| 3modern | 338 | Kawai, Hiroki1988 (1587) | Lost 1-2 | -171483 |
| 4modern | 404 | Ishibashi, Takuya (1401) | Lost 1-2 | -191464 |
| top | average opponent: 1500record: 1-3 | new rating: 1464 | ||