Kato, Ataru
Current rating: 1373
| Grand Prix Nagoya 2020 (pioneer) | starting rating: 1418 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 109 | Komuro, Akira (1500) | Lost 0-2 | -161402 |
| 2pioneer | 519 | Ohta, Shun (1576) | Won 2-1 | +211423 |
| 3pioneer | 666 | Awazu, Koichi (1506) | Lost 1-2 | -171406 |
| 4pioneer | 594 | Lee, Hyukjeong (1505) | Lost 1-2 | -161390 |
| 5pioneer | 674 | Yoshihara, Shouta (1463) | Lost 0-2 | -171373 |
| top | average opponent: 1510record: 1-4 | new rating: 1373 | ||
| Grand Prix Yokohama 2019 (modern) | starting rating: 1383 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 343 | Shikano, Hiroto (1530) | Won 2-0 | +211404 |
| 2modern | 236 | Wakizaka, Hironari (1650) | Lost 1-2 | -141390 |
| 3modern | 666 | Hayakawa, Ryo (1440) | Draw 1-1 | +11391 |
| 4modern | 800 | Nakahara, Daichi (1498) | Won 2-1 | +201411 |
| 5modern | 532 | Yoshikawa, Takuma (1476) | Won 2-0 | +191430 |
| 6modern | 339 | Ito, Shinichi (1703) | Lost 0-2 | -131417 |
| 7modern | 542 | Hariu, Daichi (1342) | Lost 1-2 | -191398 |
| 8modern | 556 | Itoh, Akira2497 (1526) | Won 2-0 | +201418 |
| top | average opponent: 1521record: 4-3-1 | new rating: 1418 | ||
| Grand Prix Shizuoka 2018 (legacy) (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 240 | Brown, Sean [AUS] (1475) | Lost 1-2 | -181482 |
| 2legacy | 519 | Suzuki, Taito (1402) | Lost 1-2 | -201462 |
| 3legacy | 617 | Kubota, Hirofumi (1373) | Won 2-0 | +161478 |
| 4legacy | 601 | Okada, Taro (1533) | Lost 0-2 | -171461 |
| 5legacy | 615 | Okamoto, Yoshiaki (1461) | Lost 0-2 | -181443 |
| 6legacy | 578 | Nakazawa, Koutarou (1285) | Lost 1-2 | -201423 |
| 7legacy | 510 | Toyohara, Eisuke (1239) | Lost 1-2 | -221401 |
| 8legacy | 451 | Ishiguro, Tetsuya (1400) | Lost 0-2 | -181383 |
| top | average opponent: 1396record: 1-7 | new rating: 1383 | ||