Arimatsu, Naoto
Current rating: 1456
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1492 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 172 | Ikemoto, Syota (1500) | Won 2-1 | +181510 |
| 2standard | 449 | Taka, Norihisa (1594) | Lost 0-2 | -161494 |
| 3standard | 702 | Wakayama, Tetsuya (1480) | Lost 0-2 | -191475 |
| 4standard | 715 | Tanaka, Ryuto (1429) | Lost 0-2 | -181457 |
| 5standard | 879 | Tsuchiya, Yoshihiro (1381) | Won 2-0 | +161473 |
| 6standard | 699 | Kokubo, Masayuki (1503) | Lost 0-2 | -171456 |
| top | average opponent: 1481record: 2-4 | new rating: 1456 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1488 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 724 | Nakamura, Sara (1599) | Won 2-1 | +201508 |
| 2sealed | 18 | Hara, Yusuke 8993 (1513) | Won 2-1 | +181526 |
| 3sealed | 367 | Ieda, Toma (1578) | Won 2-1 | +191545 |
| 4sealed | 98 | Yoshida, Yutarou (1514) | Lost 1-2 | -181527 |
| 5sealed | 181 | Kogure, Takamasa (1496) | Lost 1-2 | -191508 |
| 6sealed | 468 | Yamazaki, Hiroyuki (1620) | Lost 0-2 | -161492 |
| top | average opponent: 1553record: 3-3 | new rating: 1492 | ||
| Grand Prix Kyoto 2017 (HOU limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 246 | Saitou, Masashi (1404) | Won 2-1 | +161516 |
| 2sealed | 428 | Tsukagoshi, Tadaki (1702) | Won 2-1 | +221538 |
| 3sealed | 24 | McNamara, Hugh (1578) | Lost 0-2 | -181520 |
| 4sealed | 405 | Iwata, Sou (1463) | Won 2-0 | +171537 |
| 5sealed | 277 | Zeggio, Riccardo (1442) | Lost 1-2 | -191518 |
| 6sealed | 463 | Cubit, Ryan (1933) | Lost 0-2 | -111507 |
| 7sealed | 733 | Matsumoto, Takashi (1474) | Lost 1-2 | -191488 |
| top | average opponent: 1571record: 3-4 | new rating: 1488 | ||