Katumata, Siniti
Current rating: 1545
Record: 5-3
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 513 | Tanaka, Kouki (1524) | Won 2-1 | +181518 |
| 2sealed | 578 | Kato, Yoshiaki (1518) | Won 2-1 | +181536 |
| 3sealed | 153 | Tokutake, Masayuki (1501) | Won 2-0 | +181554 |
| 4sealed | 112 | Hasegawa, Shinpei (1350) | Lost 0-2 | -221532 |
| 5sealed | 519 | Kimura, Shigeki (1789) | Won 2-0 | +231555 |
| 6sealed | 324 | Itou, Kouei (1813) | Won 2-0 | +221577 |
| 7sealed | 76 | Hozuki, Atsushi (1493) | Lost 1-2 | -191558 |
| 8sealed | 182 | Nanjo, Masashi (1861) | Lost 1-2 | -131545 |
| average opponent: 1606record: 5-3 | new rating: 1545 | |||