Sakai, Naoko
Current rating: 1533
Record: 23-21-3
| Grand Prix Hiroshima 2006 (CSP limited) | starting rating: 1469 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 73 | Kawate, Makoto (1482) | Won 2-0 | +191488 |
| 2sealed | 40 | Saitou, Kotatsu (1608) | Draw 1-1 | +21490 |
| 3sealed | 61 | Okamura, Hideki (1517) | Lost 1-2 | -181472 |
| 4sealed | 129 | Uesugi, Zenkyou (1497) | Won 2-0 | +191491 |
| 5sealed | 97 | Masaki, Daisuke (1517) | Won 2-0 | +181509 |
| 6sealed | 64 | Suzuki, Shin (1615) | Won 2-0 | +201529 |
| 7sealed | 39 | Kaji, Tetsuya (1603) | Lost 0-2 | -161513 |
| 8sealed | 57 | Takahashi, Yuta (1630) | Won 2-1 | +201533 |
| top | average opponent: 1559record: 5-2-1 | new rating: 1533 | ||
| Grand Prix Yokohama 2004 (COK limited) | starting rating: 1508 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 8 | Matsumura, Hideyuki (1498) | Lost 0-2 | -181490 |
| 2sealed | 299 | Uesugi, Zenkyou (1484) | Won 2-0 | +181508 |
| 3sealed | 212 | Miura, Yushiro (1399) | Lost 0-2 | -201488 |
| 4sealed | 264 | Matsuhashi, Hideto (1479) | Lost 0-2 | -181470 |
| 5sealed | 242 | Fujisawa, Takashi (1461) | Won 2-0 | +181488 |
| 6sealed | 173 | Mochizuki, Takahito (1426) | Won 2-0 | +171505 |
| 7sealed | 136 | Tanaka, Yousuke (1552) | Lost 0-2 | -171488 |
| 8sealed | 4 | Yamada, Tomotaro (1480) | Lost 0-2 | -191469 |
| top | average opponent: 1472record: 3-5 | new rating: 1469 | ||
| Grand Prix Kyoto 2003 (LGN limited) | starting rating: 1553 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 212 | Ogawa, Gou (1500) | Won 2-0 | +171570 |
| 2sealed | 41 | Kaneko, Masami (1468) | Lost 0-2 | -201550 |
| 3sealed | 201 | Chogyoji, Tetsuya (1500) | Lost 1-2 | -191531 |
| 4sealed | 245 | Sato, Akihisa (1481) | Won 2-1 | +181549 |
| 5sealed | 186 | Katsuta, Souichi (1501) | Lost 0-2 | -191530 |
| 6sealed | 187 | Deyama, Hirofumi (1472) | Won 2-0 | +171547 |
| 7sealed | 137 | Umezawa, Shinobu (1492) | Lost 0-2 | -191528 |
| 8sealed | 139 | Lee, Sang-Ryeol (1465) | Lost 1-2 | -201508 |
| top | average opponent: 1485record: 3-5 | new rating: 1508 | ||
| Grand Prix Utsunomiya 2002 (ONS rochester) | starting rating: 1561 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 107 | Suzuki, Mayumi (1490) | Draw 1-1 | -11560 |
| 2sealed | 178 | Okada, Seiji (1499) | Won 2-1 | +171577 |
| 3sealed | 99 | Miyabe, Kouichi (1518) | Lost 1-2 | -201557 |
| 4sealed | 188 | Osumi, Keigo (1503) | Won 2-0 | +171574 |
| 5sealed | 123 | Anazawa, Yoshikazu (1518) | Lost 1-2 | -191555 |
| 6sealed | 158 | Saikatsu, Akira (1498) | Won 2-0 | +171572 |
| 7sealed | 111 | Kawazoe, Hiroki (1505) | Lost 0-2 | -191553 |
| top | average opponent: 1505record: 3-3-1 | new rating: 1553 | ||
| Grand Prix Sapporo 2002 (Odyssey block) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 140 | Kawamura, Wataru (1500) | Lost 0-2 | -171464 |
| 2block | 176 | Kawamura, Takaki (1482) | Won 2-0 | +181482 |
| 3block | 153 | Saito, Yu (Miyagi) (1483) | Won 2-0 | +181500 |
| 4block | 120 | Goto, Takashi (1544) | Won 2-0 | +191519 |
| 5block | 87 | Nomura, Eiji (1590) | Won 2-0 | +191538 |
| 6block | 37 | Chiba, Shun (1564) | Won 2-1 | +191557 |
| 7block | 22 | Kobayashi, Hideki (1732) | Lost 0-1 | -151542 |
| 8block | 33 | Igarashi, Takayuki (1600) | Won 2-1 | +191561 |
| top | average opponent: 1562record: 6-2 | new rating: 1561 | ||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 84 | Ishikawa, Ryota (1500) | Won 2-1 | +181518 |
| 2block | 44 | Nakai, Ryoji (1500) | Lost 0-2 | -181500 |
| 3block | 457 | Yoshioka, Hideki (1500) | Draw 1-1 | 01500 |
| 4block | 402 | Nagura, Hiroaki (1501) | Won 2-1 | +181518 |
| 5block | 272 | Seo, Taiki (1484) | Lost 1-2 | -191499 |
| 6block | 367 | Suzuki, Sosuke (1501) | Won 2-0 | +181517 |
| 7block | 264 | Okajima, Keisuke (1518) | Lost 0-2 | -181499 |
| 8block | 257 | Nishikawa, Takahito (1516) | Lost 1-2 | -181481 |
| top | average opponent: 1502record: 3-4-1 | new rating: 1481 | ||