Otuka, Yasutaka
Current rating: 1501
Record: 4-4
| Grand Prix Yokohama 2004 (COK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 252 | Uotsu, Atsushi (1478) | Lost 0-2 | -181482 |
| 2sealed | 259 | Masuyama, Yuko (1406) | Won 2-0 | +161498 |
| 3sealed | 208 | Araki, Yusuke (1498) | Won 2-1 | +181516 |
| 4sealed | 97 | Furujou, Takashi (1500) | Won 2-1 | +181534 |
| 5sealed | 53 | Konno, Masashi (1609) | Lost 0-1 | -171517 |
| 6sealed | 141 | Handa, Takuya (1490) | Won 2-0 | +181535 |
| 7sealed | 102 | Katayose, Shingo (1546) | Lost 1-2 | -181517 |
| 8sealed | 73 | Mitamura, Kazuya (1616) | Lost 0-2 | -161501 |
| average opponent: 1518record: 4-4 | new rating: 1501 | |||