Oshima, Kazuaki
Current rating: 1425
Record: 2-6
| Grand Prix Yokohama 2004 (COK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 13 | Sugahara, Hideyuki (1446) | Lost 0-2 | -191481 |
| 2sealed | 212 | Motoi, Kenichi (1522) | Lost 0-2 | -171464 |
| 3sealed | 291 | Nagashima, Yuji (1413) | Lost 0-2 | -191445 |
| 4sealed | 285 | Shimeno, Yu (1427) | Lost 0-2 | -181427 |
| 5sealed | 247 | Taguchi, Yoshihito (1428) | Won 2-0 | +181445 |
| 6sealed | 202 | Goto, Takahiro (1382) | Lost 1-2 | -201425 |
| 7sealed | 164 | Kubota, Taiga (1387) | Lost 0-2 | -181407 |
| 8sealed | 63 | Oshimi, Akira (1413) | Won 2-0 | +181425 |
| average opponent: 1427record: 2-6 | new rating: 1425 | |||