Okamura, Koshi
Current rating: 1481
Record: 5-6-1
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1536 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 755 | Kondou, Yoshiki (1557) | Lost 0-2 | -181518 |
| 2standard | 1218 | Okubi, Momoka (1482) | Won 2-0 | +181536 |
| 3standard | 1110 | Makino, Yuuhei (1482) | Lost 0-2 | -191517 |
| 4standard | 1418 | Ishitsuka, Masahito (1547) | Lost 0-2 | -181499 |
| 5standard | 1440 | Saida, Yukihiko (1464) | Lost 1-2 | -181481 |
| average opponent: 1506record: 1-4 | new rating: 1481 | |||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2128 | Yamagiwa, Yuji (1500) | Draw 1-1 | 01500 |
| 2sealed | 2259 | Tawada, Naoto (1482) | Won 2-1 | +181518 |
| 3sealed | 2213 | Mizumoto, Hirotaka (1476) | Won 2-0 | +171535 |
| 4sealed | 2103 | Kanehira, Haruki (1461) | Won 2-0 | +171552 |
| 5sealed | 2054 | Kawano, Norimitsu (1552) | Lost 0-2 | -181534 |
| 6sealed | 2129 | Minami, Masashi (1685) | Won 2-1 | +201554 |
| 7sealed | 2081 | Saijo, Yuichi (1528) | Lost 1-2 | -181536 |
| average opponent: 1526record: 4-2-1 | new rating: 1536 | |||