Sako, Wataru
Current rating: 1499
Record: 16-16
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1522 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 330 | Toyohara, Eisuke (1266) | Won 2-0 | +141536 |
| 4sealed | 248 | Okamura, Takumi (1542) | Lost 1-2 | -181518 |
| 5sealed | 413 | Tanaka, Hironori (1467) | Won 2-0 | +171535 |
| 6sealed | 294 | Mori, Fumiya (1499) | Lost 1-2 | -191516 |
| 7sealed | 462 | Watanabe, Yuta9087 (1562) | Lost 0-2 | -171499 |
| top | average opponent: 1467record: 2-3 | new rating: 1499 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 738 | Kazuyoshi, Nakade (1500) | Lost 0-2 | -171481 |
| 2sealed | 838 | Ichikawa, Tatsuya 3238 (1542) | Won 2-0 | +191500 |
| 3sealed | 640 | Shiota, Fumihiko (1855) | Won 2-0 | +241524 |
| 4sealed | 567 | Tsuchiya, Mihoko (1514) | Won 2-1 | +181542 |
| 5sealed | 392 | Sugaya, Takeshi (1435) | Lost 0-2 | -201522 |
| 6sealed | 379 | Nakamura, Akira (1565) | Won 2-0 | +191541 |
| 7sealed | 388 | Takeuchi, Shuuji (1521) | Lost 0-2 | -191522 |
| top | average opponent: 1562record: 4-3 | new rating: 1522 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 541 | Tomioka, Teppei (1484) | Lost 1-2 | -181483 |
| 2standard | 1086 | Nakano, Atsushi (1653) | Won 2-0 | +211504 |
| 3standard | 862 | Tanaka, Tsubasa (1479) | Won 2-1 | +181522 |
| 4standard | 612 | Yamano, Tatsuto (1303) | Lost 1-2 | -221500 |
| 5standard | 1206 | Matsuzaki, Ryuta (1488) | Won 2-1 | +181518 |
| 6standard | 767 | Kato, Yasuhiro (1521) | Won 2-0 | +181536 |
| 7standard | 650 | Komatsu, Yuuhei (1485) | Lost 0-2 | -191517 |
| 8standard | 540 | Isoda, Syouichi (1502) | Lost 0-2 | -191498 |
| top | average opponent: 1489record: 4-4 | new rating: 1498 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 441 | Benavente, Christopher (1520) | Won 2-1 | +181519 |
| 2sealed | 442 | Kato, Jun (1520) | Lost 1-2 | -181501 |
| top | average opponent: 1520record: 1-1 | new rating: 1501 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 5 | Arai, Ikki (1354) | Won 2-0 | +151499 |
| 2sealed | 34 | Hanaoka, Shinichiro (1546) | Won 2-0 | +191518 |
| 3sealed | 7 | Mihashi, Takanobu (1588) | Lost 0-2 | -171501 |
| 4sealed | 264 | Kurusu, Kazuki (1398) | Won 2-0 | +171518 |
| 5sealed | 82 | Ookubo, Hironobu (1692) | Won 2-0 | +211539 |
| 6sealed | 68 | Suzuki, Atsushi (1459) | Lost 0-2 | -201519 |
| 7sealed | 205 | Kondo, Masahiro (1513) | Lost 1-2 | -181501 |
| top | average opponent: 1507record: 4-3 | new rating: 1501 | ||
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 131 | Onodera, Yusuke (1500) | Won 2-0 | +181518 |
| 2sealed | 114 | Watanabe, Yasunari (1518) | Lost 0-2 | -181500 |
| 3sealed | 309 | Ishigaki, Ryousuke (1589) | Lost 1-2 | -161484 |
| top | average opponent: 1536record: 1-2 | new rating: 1484 | ||