Sakamoto, Naruhiko
Current rating: 1501
| Grand Prix Yokohama 2012 (modern) | starting rating: 1502 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 183 | Kaizu, Hareta (1464) | Won 2-0 | +171519 |
| 2modern | 162 | Saitou, Ryuuga (1465) | Lost 1-2 | -191500 |
| 3modern | 294 | Yamaguchi, Tetsuya (1519) | Lost 1-2 | -181482 |
| 4modern | 549 | Kimoto, Keiya (1464) | Won 2-0 | +181500 |
| 5modern | 433 | Yamasita, Akinori (1500) | Won 2-1 | +181518 |
| 6modern | 418 | Kurosaki, Hiroki (1559) | Lost 0-2 | -171501 |
| top | average opponent: 1495record: 3-3 | new rating: 1501 | ||
| Grand Prix Hiroshima 2011 (ISD standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 212 | Jinbo, Takashi (1500) | Lost 0-2 | -181482 |
| 2standard | 240 | Nakagawa, Jun (1481) | Won 2-0 | +181500 |
| 3standard | 115 | Tsukamoto, Tatsushi (1463) | Won 2-1 | +171517 |
| 4standard | 188 | Niimi, Kiyoaki (1700) | Won 2-0 | +211538 |
| 5standard | 103 | Iwata, Mitsuhiro (1509) | Lost 1-2 | -181520 |
| 6standard | 221 | Yamanaka, Takuya (1514) | Lost 1-2 | -181502 |
| top | average opponent: 1528record: 3-3 | new rating: 1502 | ||
| Grand Prix Sendai 2010 (ROE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 122 | Okada, Takuya (1569) | Lost 0-2 | -171483 |
| 2standard | 303 | Tanaka, Kazuhiko (1435) | Lost 1-2 | -191464 |
| 3standard | 360 | Shimizu, Tomoyuki (1464) | Won 2-0 | +181482 |
| 4standard | 310 | Yamazaki, Toshiyuki (1486) | Won 2-0 | +181500 |
| 5standard | 323 | Baba, Yoshinao (1466) | Won 2-0 | +181518 |
| 6standard | 240 | Kitsunezuka, Masanori (1502) | Lost 1-2 | -181500 |
| top | average opponent: 1487record: 3-3 | new rating: 1500 | ||