Hoshi, Kazumi
Current rating: 1405
Record: 14-20
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1389 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 226 | Fujita, Tatsuya (1500) | Won 2-0 | +201409 |
| 2sealed | 203 | Shimura, Takeshi (1280) | Lost 0-2 | -201389 |
| 3sealed | 897 | Wu, Songwei (1761) | Lost 0-2 | -121377 |
| 4sealed | 972 | Honjou, Daiki (1483) | Won 2-0 | +201397 |
| 5sealed | 765 | Okuda, Masateru (1550) | Won 2-0 | +211418 |
| 6sealed | 407 | Shiraishi, Hiroaki (1706) | Lost 0-2 | -131405 |
| top | average opponent: 1547record: 3-3 | new rating: 1405 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1442 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 416 | Akasaka, Yasuyuki (1483) | Lost 0-2 | -171425 |
| 2sealed | 676 | Kurahashi, Hironori (1548) | Lost 0-2 | -161409 |
| 3sealed | 1054 | Ohshiba, Atsushi (1312) | Lost 0-2 | -201389 |
| top | average opponent: 1448record: 0-3 | new rating: 1389 | ||
| Grand Prix Chiba 2016 (legacy) | starting rating: 1519 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 195 | Tsumagari, Shuhei (1414) | Lost 1-2 | -201499 |
| 2legacy | 549 | Agemura, Shota (1451) | Lost 1-2 | -191480 |
| 3legacy | 1103 | Nakadai, Keisuke (1427) | Lost 1-2 | -191461 |
| 4legacy | 1114 | Bin Sawal, Mohammed Nasir (1396) | Lost 0-2 | -191442 |
| top | average opponent: 1422record: 0-4 | new rating: 1442 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1527 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 6 | Arai, Yoshimi (1175) | Lost 1-2 | -241503 |
| 2standard | 1132 | Nishikawa, Suguru (1508) | Won 2-1 | +181521 |
| 3standard | 975 | Watanabe, Eiho (1464) | Won 2-1 | +171538 |
| 4standard | 682 | Matsui, Shintaro (1411) | Lost 1-2 | -211517 |
| 5standard | 1150 | Farrington, Kyle (1560) | Won 2-1 | +191536 |
| 6standard | 619 | Tanaka, Yuuya (1569) | Lost 0-2 | -171519 |
| top | average opponent: 1448record: 3-3 | new rating: 1519 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1528 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 704 | Igarashi, Takuma (1468) | Lost 0-2 | -191509 |
| 2sealed | 759 | Kazumasa, Akihiro (1405) | Won 2-0 | +161525 |
| 3sealed | 996 | Matsushita, Takayuki (1596) | Won 2-1 | +191544 |
| 4sealed | 546 | Goto, Tetsuya (1530) | Won 2-1 | +181562 |
| 5sealed | 263 | Kawashita, Makoto (1675) | Lost 0-2 | -161546 |
| 6sealed | 656 | Naraya, Takaaki (1476) | Lost 0-2 | -191527 |
| top | average opponent: 1525record: 3-3 | new rating: 1527 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 397 | Furukawa, Ryouta (1500) | Won 2-0 | +181518 |
| 2sealed | 55 | Okamoto, Konosuke (1474) | Won 2-0 | +171535 |
| 3sealed | 200 | Tamai, Toshimasa (1455) | Won 2-1 | +171552 |
| 4sealed | 84 | Juumonji, Ryou (1741) | Lost 1-2 | -151537 |
| 5sealed | 72 | Shimizu, Naoki (1810) | Won 2-1 | +231560 |
| 6sealed | 65 | Watanabe, Yoshiaki (1454) | Won 2-1 | +161576 |
| 7sealed | 30 | Suzuki, Yuuji (1604) | Lost 0-2 | -171559 |
| 8sealed | 142 | Takahashi, Yuta (1870) | Lost 1-2 | -131546 |
| 9sealed | 129 | Lee, Sean (1538) | Lost 0-2 | -181528 |
| top | average opponent: 1605record: 5-4 | new rating: 1528 | ||