Ishihara, Ken
Current rating: 1507
Record: 7-6-1
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1548 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 30 | Yamanouchi, Takanori (1448) | Lost 0-2 | -201528 |
| 2sealed | 873 | Hayashi, Nobuhiko (1451) | Draw 1-1 | -11527 |
| 3sealed | 1093 | Takeuchi, Shuuji (1467) | Won 1-0 | +171544 |
| 4sealed | 842 | Minamimura, Yukihiro (1471) | Lost 0-2 | -201524 |
| 5sealed | 981 | Kouyama, Shinji (1550) | Lost 0-2 | -171507 |
| average opponent: 1477record: 1-3-1 | new rating: 1507 | |||
| Grand Prix Nagoya 2004 (5DN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 89 | Okada, Jun (1500) | Won 2-0 | +181518 |
| 2standard | 76 | Hasegawa, Suguru (1556) | Lost 0-2 | -171501 |
| 3standard | 258 | Yamamoto, Keitaro (1493) | Won 2-0 | +181519 |
| 4standard | 204 | Sumino, Hironori (1413) | Won 2-0 | +161535 |
| 5standard | 86 | Ushie, Yuuta (1553) | Lost 1-2 | -181517 |
| 6standard | 264 | Nagata, Hikaru (1486) | Won 2-0 | +171534 |
| 7standard | 86 | Iyanaga, Junya (1514) | Won 2-0 | +181552 |
| 8standard | 60 | Shiba, Norihito (1466) | Won 2-0 | +161568 |
| 9standard | 74 | Se, Atsuo (1441) | Lost 1-2 | -201548 |
| average opponent: 1491record: 6-3 | new rating: 1548 | |||