Kozuka, Kouji
Current rating: 1309
Record: 5-17-2
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1352 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 284 | Maruya, Takashi (1484) | Lost 0-2 | -161336 |
| 2sealed | 989 | Nakae, Syu (1547) | Lost 0-2 | -141322 |
| 3sealed | 1195 | Omuta, Shoya (1464) | Lost 1-2 | -161306 |
| 4sealed | 1195 | Ouki, Kimura (1447) | Draw 1-1 | +31309 |
| top | average opponent: 1485record: 0-3-1 | new rating: 1309 | ||
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1383 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 100 | Mizuno, Soichiro (1483) | Lost 0-2 | -161367 |
| 2standard | 788 | Hirai, Masumi (1275) | Lost 1-2 | -201347 |
| 3standard | 1134 | Motodane, Ken (1463) | Lost 0-2 | -151332 |
| 4standard | 1171 | Matsuyoshi, Wataru (1447) | Won 2-1 | +201352 |
| top | average opponent: 1417record: 1-3 | new rating: 1352 | ||
| Grand Prix Kobe 2014 (modern) | starting rating: 1453 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 340 | Takano, Yuuki (1493) | Lost 0-2 | -181435 |
| 2modern | 372 | Lee, Kunbu (1482) | Won 2-0 | +191454 |
| 3modern | 285 | Miyagi, Moto (1472) | Lost 0-2 | -171437 |
| 4modern | 413 | Nakai, Tomoki (1391) | Lost 0-2 | -191418 |
| 5modern | 453 | Iwasaki, Junya (1464) | Lost 0-2 | -171401 |
| 6modern | 470 | Takamisawa, Yuki (1445) | Lost 0-2 | -181383 |
| top | average opponent: 1458record: 1-5 | new rating: 1383 | ||
| Grand Prix Nagoya 2014 (BNG limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 590 | Uchida, Kenji (1500) | Won 2-0 | +191483 |
| 2sealed | 651 | Kawauchi, Kouji (1521) | Lost 0-1 | -171466 |
| 3sealed | 727 | Shimono, Tetsuro (1704) | Lost 0-2 | -141452 |
| 4sealed | 860 | Smithberger, John (1482) | Draw 1-1 | +11453 |
| 5sealed | 819 | Tanahashi, Hirofumi (1427) | Won 2-0 | +171470 |
| 6sealed | 751 | Yoshida, Koki (1499) | Lost 0-2 | -171453 |
| top | average opponent: 1522record: 2-3-1 | new rating: 1453 | ||
| Grand Prix Nagoya 2012 (RTR standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 175 | Sokolovsky, Jesse (1523) | Won 2-1 | +181518 |
| 2standard | 106 | Nakajima, Kenichirou (1518) | Lost 0-2 | -181500 |
| 3standard | 484 | arakawa, kenichi (1500) | Lost 0-2 | -181482 |
| 4standard | 729 | Owada, Kazuya (1482) | Lost 1-2 | -181464 |
| top | average opponent: 1506record: 1-3 | new rating: 1464 | ||