Koyama, Kazuya
Current rating: 1466
Record: 2-4
| Grand Prix Sendai 2004 (DST limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 167 | Miwa, Tatsuya (1597) | Lost 0-2 | -161484 |
| 2sealed | 147 | Natsume, Takuya (1536) | Won 2-0 | +191503 |
| 3sealed | 101 | Mera, Kenichi (1438) | Lost 0-2 | -191484 |
| 4sealed | 204 | Matsushita, Kenichi (1500) | Won 2-1 | +181502 |
| 5sealed | 161 | Murata, Kouji (1515) | Lost 1-2 | -181484 |
| 6sealed | 145 | Ishiyama, Hiroki (1492) | Lost 0-2 | -181466 |
| average opponent: 1513record: 2-4 | new rating: 1466 | |||