Ookubo, Izumi
Current rating: 1500
Record: 4-4
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1025 | Yanagida, Yuya (1444) | Lost 1-2 | -191481 |
| 2sealed | 1325 | Noto, Yoshinari (1439) | Won 2-0 | +171498 |
| 3sealed | 1189 | Tamano, Yuuki (1479) | Lost 0-2 | -181480 |
| 4sealed | 1266 | Tsuchihashi, Takuya (1446) | Won 2-1 | +171497 |
| 5sealed | 1108 | Abdulrahman, Mohdeffen (1498) | Won 2-1 | +181515 |
| 6sealed | 1096 | Iwahashi, Hiroki (1512) | Lost 0-2 | -181497 |
| 7sealed | 1038 | Bang, Sangmun (1573) | Won 2-0 | +201517 |
| 8sealed | 987 | Itou, Tai (1598) | Lost 1-2 | -171500 |
| average opponent: 1499record: 4-4 | new rating: 1500 | |||