Oshima, Masanori
Current rating: 1499
Record: 4-4
| Grand Prix Yokohama 2019 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 398 | Inaka, Shigeru (1500) | Won 2-0 | +181518 |
| 2modern | 317 | Ferrer, John Reuben (1546) | Lost 0-2 | -171501 |
| 3modern | 611 | Abe, Yusuke 4043 (1502) | Won 2-0 | +181519 |
| 4modern | 455 | Narita, Chisato (1601) | Lost 1-2 | -171502 |
| 5modern | 814 | Jinguu, Keiji (1424) | Lost 1-2 | -191483 |
| 6modern | 763 | Hosokawa, Takahiro (1282) | Won 2-0 | +141497 |
| 7modern | 669 | Urasawa, Taiji (1674) | Lost 0-2 | -151482 |
| 8modern | 606 | Oei, Henry (1394) | Won 2-1 | +171499 |
| average opponent: 1490record: 4-4 | new rating: 1499 | |||