Ishikawa, Jun
Current rating: 1407
Record: 14-23-4
| Grand Prix Yokohama 2019 (modern) | starting rating: 1412 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 196 | Kato, Yuki5406 (1500) | Won 2-0 | +201432 |
| 2modern | 256 | Inoguchi, Hironobu (1672) | Lost 1-2 | -141418 |
| 3modern | 590 | Ine, Ryosuke (1492) | Won 2-1 | +201438 |
| 4modern | 300 | Morishita, Hirotaka (1506) | Won 2-0 | +191457 |
| 5modern | 316 | Yahaba, Hirokazu (1542) | Lost 1-2 | -171440 |
| 6modern | 353 | Fukutani, Yuto (1589) | Lost 0-2 | -151425 |
| 7modern | 714 | Okada, Koji (1422) | Lost 0-2 | -181407 |
| top | average opponent: 1532record: 3-4 | new rating: 1407 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1437 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 358 | Takatsuka, Yuuki (1629) | Lost 0-2 | -141423 |
| 3standard | 980 | Konno, Tomoyuki (1490) | Won 2-0 | +191442 |
| 4standard | 781 | Kawatsu, Shunsuke (1453) | Won 2-1 | +181460 |
| 5standard | 196 | Jinbo, Takashi (1574) | Lost 1-2 | -161444 |
| 6standard | 742 | Sakai, Yoshiki (1384) | Lost 0-2 | -191425 |
| 7standard | 907 | Samanta, Rupa (1671) | Lost 1-2 | -141411 |
| 8standard | 856 | Yamaguchi, Tomohiro (1469) | Lost 1-2 | -171394 |
| 9standard | 770 | Ikeda, Kengo (1385) | Won 2-0 | +181412 |
| top | average opponent: 1507record: 3-5 | new rating: 1412 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1422 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 956 | Yonezawa, Musashi (1743) | Won 2-1 | +241446 |
| 2standard | 170 | Takeuchi, Yamato (1517) | Won 2-1 | +191465 |
| 3standard | 522 | Yamada, Toshihiro (1752) | Lost 0-2 | -131452 |
| 4standard | 946 | Naitou, Hisashi (1561) | Lost 1-2 | -161436 |
| 5standard | 1147 | Kim, Kyungho (1466) | Draw 1-1 | +11437 |
| 6standard | 1001 | Kandou, Kazuhiro (1484) | Won 2-1 | +191456 |
| 7standard | 746 | Tang, Jianhua (1425) | Lost 0-2 | -191437 |
| top | average opponent: 1564record: 3-3-1 | new rating: 1437 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1430 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 654 | Kosaka, Yuki (1487) | Lost 1-2 | -171413 |
| 2sealed | 952 | Nishimoto, Takuya (1660) | Draw 1-1 | +41417 |
| 3sealed | 1082 | Kaneko, Masayuki (1485) | Won 2-1 | +191436 |
| 4sealed | 856 | Saitou, Ippei (1590) | Draw 1-1 | +31439 |
| 5sealed | 973 | Makoto, Tsujioka (1500) | Lost 0-2 | -171422 |
| top | average opponent: 1544record: 1-2-2 | new rating: 1422 | ||
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1415 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 489 | Higuchi, Masaki (1492) | Draw 1-1 | +21417 |
| 2standard | 560 | Nomura, Takashi (1560) | Lost 1-2 | -161401 |
| 3standard | 1054 | Mizoguchi, Satoru (1453) | Won 2-0 | +191420 |
| 4standard | 850 | Mizuki, Azuma (1502) | Won 2-1 | +201440 |
| 5standard | 588 | Motoshi, Takahashi (1519) | Won 2-1 | +191459 |
| 6standard | 353 | Hiiro, Uematsu (1545) | Lost 1-2 | -161443 |
| 7standard | 536 | Yuuhi, Fuchimoto (1482) | Lost 1-2 | -181425 |
| 8standard | 559 | Suzuki, Fumito (1602) | Lost 0-2 | -141411 |
| 9standard | 509 | Fukui, Kouichirou (1479) | Won 2-0 | +191430 |
| top | average opponent: 1515record: 4-4-1 | new rating: 1430 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1445 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2392 | Kikutani, Kou (1614) | Lost 0-2 | -151430 |
| 2sealed | 2405 | Aoki, Ryousuke (1615) | Lost 0-2 | -151415 |
| top | average opponent: 1615record: 0-2 | new rating: 1415 | ||
| Grand Prix Shizuoka 2015 (KTK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 672 | Uchiyama, Kouichi (1500) | Lost 0-2 | -181482 |
| 2sealed | 1008 | Kasama, Junichi (1416) | Lost 1-2 | -191463 |
| 3sealed | 1106 | Sugioka, Hironobu (1463) | Lost 0-2 | -181445 |
| top | average opponent: 1460record: 0-3 | new rating: 1445 | ||