Ohshima, Hironori
Current rating: 1612
Record: 12-7
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1496 | |||
| round | table | opponent (rating) | result | Δrating |
| 3pioneer | 272 | Tanabe, Tetsuya (1590) | Won 2-1 | +201516 |
| 4pioneer | 42 | Lai, Charles (1566) | Won 2-0 | +191535 |
| 5pioneer | 89 | Canonica, Kevin (1798) | Lost 1-2 | -141521 |
| 6pioneer | 195 | Shiohata, Ryosuke (1564) | Won 2-0 | +191540 |
| 7pioneer | 51 | Koyama, Yuji (1785) | Won 2-1 | +231563 |
| 8pioneer | 25 | Nakahara, Yusuke (1638) | Won 2-1 | +191582 |
| 9pioneer | 36 | Sato, Keisuke (1636) | Won 2-1 | +191601 |
| 10pioneer | 5 | Han, Yi (1762) | Lost 1-2 | -151586 |
| 11pioneer | 36 | Miyajima, Jun'Ichi (1557) | Lost 1-2 | -191567 |
| 12pioneer | 52 | Morimoto, Yutaro (1626) | Won 2-1 | +191586 |
| 13pioneer | 50 | Seo, Kenta (1735) | Lost 0-2 | -151571 |
| 14pioneer | 85 | Aoki, Takashi (1586) | Won 2-0 | +181589 |
| 15pioneer | 37 | Kamata, Kazuhiro (1855) | Won 2-1 | +231612 |
| average opponent: 1669record: 9-4 | new rating: 1612 | |||
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 623 | Nakayama, Masaki (1466) | Lost 1-2 | -191481 |
| 2sealed | 616 | Nishihara, Masataka (1411) | Lost 1-2 | -191462 |
| 3sealed | 1091 | Nishimura, Koichi (1268) | Won 2-0 | +151477 |
| 4sealed | 876 | Izawa, Kazuki (1503) | Won 2-1 | +181495 |
| 5sealed | 852 | Toyama, Takashi (1473) | Won 2-0 | +181513 |
| 6sealed | 392 | Saito, Yuki (1590) | Lost 0-2 | -171496 |
| average opponent: 1452record: 3-3 | new rating: 1496 | |||