Sasayama, Osamu
Current rating: 1502
Record: 4-4
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2017 | Okamoto, Masahiro (1409) | Lost 0-2 | -201480 |
| 2sealed | 2438 | Sawaki, Sigeru (1482) | Won 2-0 | +181498 |
| 3sealed | 2279 | Morikawa, Tomoya (1487) | Lost 1-2 | -181480 |
| 4sealed | 2384 | Nakatani, Takashi (1446) | Lost 1-2 | -181462 |
| 5sealed | 2374 | Kusunoki, Yuki (1510) | Won 2-0 | +181480 |
| 6sealed | 2291 | Motomura, Shigeru (1675) | Won 2-1 | +221502 |
| 7sealed | 2227 | Narita, Chisato (1483) | Lost 0-2 | -181484 |
| 8sealed | 2185 | Saito, Yuuki5405 (1483) | Won 2-0 | +181502 |
| average opponent: 1497record: 4-4 | new rating: 1502 | |||