Otuka, Naoki
Current rating: 1513
Record: 6-6
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 572 | Takeda, Teruhisa (1401) | Won 2-0 | +171500 |
| 2standard | 418 | Yakushi, Hideki (1534) | Won 2-0 | +181518 |
| 3standard | 274 | Kawakami, Takehito (1798) | Lost 0-2 | -131505 |
| 4standard | 672 | Yamada, Takuya (1687) | Lost 0-2 | -141491 |
| 5standard | 708 | Takenaka, Takumi (1683) | Won 2-1 | +211512 |
| 6standard | 518 | Sasaki, Tsutomu (1580) | Won 2-1 | +191531 |
| 7standard | 455 | Yamakawa, Hiroaki (1540) | Lost 1-2 | -181513 |
| average opponent: 1603record: 4-3 | new rating: 1513 | |||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 306 | Miyajima, Takuto (1619) | Won 2-0 | +201520 |
| 2standard | 33 | Ito, Makoto (1422) | Lost 0-2 | -201500 |
| 3standard | 743 | Oomura, Takashi (1501) | Won 2-1 | +181518 |
| 4standard | 550 | Shimizu, Kiichi (1486) | Lost 0-2 | -181500 |
| 5standard | 1040 | Matsuda, Yuichi (1581) | Lost 0-2 | -171483 |
| average opponent: 1522record: 2-3 | new rating: 1483 | |||