Ookubo, Shun
Current rating: 1509
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 275 | Imamura, Akihiro (1413) | Lost 1-2 | -191465 |
| 2sealed | 357 | Kimura, Keisuke (1481) | Won 2-0 | +181483 |
| 3sealed | 200 | Nakamura, Masato (1558) | Won 2-0 | +191502 |
| 4sealed | 197 | Nakajima, Hiroki 676 (1517) | Lost 1-2 | -181484 |
| 5sealed | 313 | Saito, Tomoya (1612) | Won 2-1 | +211505 |
| 6sealed | 232 | Mano, Akira (1514) | Won 2-0 | +181523 |
| 7sealed | 111 | Kinoshita, Masashi (1768) | Lost 0-2 | -141509 |
| top | average opponent: 1552record: 4-3 | new rating: 1509 | ||
| Grand Prix Yokohama 2012 (modern) | starting rating: 1540 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 241 | Oka, Tetsuya (1500) | Lost 0-2 | -181522 |
| 2modern | 443 | Hamamura, Ryudou (1483) | Lost 0-2 | -191503 |
| 3modern | 674 | Kawabe, Shuta (1463) | Won 2-0 | +171520 |
| 4modern | 524 | Kitamura, Takuto (1483) | Won 2-1 | +181538 |
| 5modern | 487 | Kaestner-Frenchman, Ben (1520) | Won 2-0 | +171555 |
| 6modern | 361 | Okabayashi, Masanao (1587) | Lost 1-2 | -171538 |
| 7modern | 356 | Fujimoto, Satoru (1501) | Lost 1-2 | -191519 |
| 8modern | 346 | Takeda, Hiroki (1591) | Lost 1-2 | -171502 |
| 9modern | 286 | Yamada, Takahiro (1465) | Lost 0-2 | -181484 |
| top | average opponent: 1510record: 3-6 | new rating: 1484 | ||
| Grand Prix Sendai 2010 (ROE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 107 | Honda, Takeru (1500) | Won 2-0 | +181518 |
| 2standard | 147 | Arakawa, Yasuaki (1606) | Won 2-1 | +201538 |
| 3standard | 77 | Ohnishi, Jyunpei (1576) | Lost 0-2 | -181520 |
| 4standard | 166 | Saito, Atsushi (1443) | Won 2-0 | +171537 |
| 5standard | 164 | Ruess, Jan (1791) | Lost 1-2 | -141523 |
| 6standard | 211 | Mayaguchi, Masaru (1430) | Won 2-1 | +171540 |
| 7standard | 154 | Ichikawa, Takayoshi (1582) | Won 2-1 | +191559 |
| 8standard | 103 | Tokuyama, Yoshihiko (1555) | Lost 0-2 | -191540 |
| top | average opponent: 1561record: 5-3 | new rating: 1540 | ||