Oikawa, Toshinori
Current rating: 1390
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1397 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 416 | Kasama, Ryo (1500) | Lost 1-2 | -161381 |
| 2sealed | 633 | Oda, Kohei (1486) | Won 2-1 | +201401 |
| 3sealed | 890 | Oozeki, Baku (1561) | Lost 0-2 | -151386 |
| 4sealed | 929 | Hashimoto, Satoshi 9278 (1512) | Won 2-1 | +201406 |
| 5sealed | 673 | Zhu, Mingyang (1490) | Lost 0-2 | -161390 |
| top | average opponent: 1510record: 2-3 | new rating: 1390 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1444 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 630 | Noguchi, Masanao (1402) | Won 2-1 | +171461 |
| 2sealed | 318 | Oohashi, Keisuke (1637) | Lost 1-2 | -141447 |
| 3sealed | 699 | Sasaki, Shou (1596) | Lost 0-2 | -161431 |
| 4sealed | 836 | Nakajou, Naoto (1447) | Lost 1-2 | -171414 |
| 5sealed | 996 | Hisasaka, Yuta (1461) | Won 2-1 | +181432 |
| 6sealed | 740 | Watanabe, Shouichi (1466) | Lost 0-2 | -171415 |
| 7sealed | 736 | Chiun-Chine, Cheo (1424) | Lost 0-2 | -181397 |
| top | average opponent: 1491record: 2-5 | new rating: 1397 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 575 | Okuno, Yuuki (1549) | Lost 0-2 | -171483 |
| 2standard | 1283 | Nogami, Tokio (1482) | Lost 0-2 | -181465 |
| 3standard | 1640 | Arai, Ikki (1316) | Lost 1-2 | -211444 |
| top | average opponent: 1449record: 0-3 | new rating: 1444 | ||