Hamada, Kouji
Current rating: 1456
Record: 17-22
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 666 | Jiang, Chenghan (1500) | Won 2-1 | +191466 |
| 2sealed | 581 | Aoki, Toshihito (1431) | Won 2-0 | +181484 |
| 3sealed | 204 | Fukudome, Yuu (1661) | Won 2-1 | +211505 |
| 4sealed | 60 | Yoshino, Kohei (1750) | Lost 0-2 | -141491 |
| 5sealed | 185 | Kitamura, Ryo (1537) | Lost 0-2 | -171474 |
| 6sealed | 380 | Iwasaki, Mitsumasa (1462) | Lost 0-2 | -181456 |
| top | average opponent: 1557record: 3-3 | new rating: 1456 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1450 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 102 | Sonoda, Takayuki (1403) | Lost 1-2 | -191431 |
| 2modern | 907 | Sumida, Masashi (1481) | Won 2-0 | +191450 |
| 3modern | 855 | Nakatani, Hiroki (1428) | Won 2-1 | +171467 |
| 4modern | 820 | Usami, Taro (1760) | Won 2-0 | +241491 |
| 5modern | 451 | Youhei, Onoue (1538) | Won 2-1 | +181509 |
| 6modern | 330 | Moriya, Yuta (1541) | Lost 0-2 | -171492 |
| 7modern | 360 | Horibe, Satoshi (1507) | Lost 0-2 | -181474 |
| 8modern | 585 | Yukuhiro, Ken (2113) | Lost 1-2 | -71467 |
| 9modern | 692 | Takata, Takumi (1394) | Lost 0-2 | -201447 |
| top | average opponent: 1574record: 4-5 | new rating: 1447 | ||
| Grand Prix Taipei 2016 (SOI standard) | starting rating: 1467 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 48 | Grube, William (1500) | Lost 0-2 | -171450 |
| top | record: 0-1 | new rating: 1450 | ||
| Grand Prix Lille 2015 (legacy) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 422 | Masciulli, Stefano (1557) | Lost 0-2 | -171467 |
| top | record: 0-1 | new rating: 1467 | ||
| Grand Prix Shizuoka 2015 (KTK limited) | starting rating: 1428 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 339 | Ishii, Hayato (1854) | Lost 1-2 | -111417 |
| 2sealed | 284 | Tamura, Kenji (1497) | Won 2-0 | +201437 |
| 3sealed | 422 | Koide, Yuichi (1508) | Won 2-1 | +191456 |
| 4sealed | 247 | Fujita, Gensho (1619) | Won 2-1 | +211477 |
| 5sealed | 166 | Kobayashi, Atsumu (1538) | Won 2-0 | +191496 |
| 6sealed | 129 | Matsushima, Yuki (1583) | Lost 0-2 | -161480 |
| 7sealed | 171 | Kimura, Yuito (1536) | Won 2-1 | +191499 |
| 8sealed | 98 | Kudo, Koichi (1677) | Lost 0-2 | -151484 |
| top | average opponent: 1601record: 5-3 | new rating: 1484 | ||
| Grand Prix Shizuoka 2013 (THS standard) | starting rating: 1462 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 674 | Nishimoto, Kouhei (1438) | Won 2-0 | +171479 |
| 2standard | 541 | Hagiwara, Masakatsu (1494) | Lost 0-2 | -171462 |
| 3standard | 817 | Tateoka, Tomoki (1536) | Lost 0-2 | -171445 |
| 4standard | 833 | Sakuma, Akira (1482) | Lost 1-2 | -171428 |
| top | average opponent: 1487record: 1-3 | new rating: 1428 | ||
| Grand Prix Kitakyushu 2013 (M14 standard) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 332 | Inami, Yuuki (1464) | Won 2-0 | +181502 |
| 2standard | 211 | Konno, Tomoaki (1517) | Lost 0-2 | -181484 |
| 3standard | 371 | Hasegawa, Tomohiro (1369) | Lost 1-2 | -201464 |
| 4standard | 498 | Takehana, Yuki (1373) | Won 2-1 | +161480 |
| 5standard | 443 | Kim, Min-Soo(big) (1463) | Lost 1-2 | -181462 |
| top | average opponent: 1437record: 2-3 | new rating: 1462 | ||
| Grand Prix Nagoya 2012 (RTR standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 206 | Yamamoto, Masayuki (1500) | Lost 0-2 | -181482 |
| 2standard | 585 | Mizuno, Masanori (1482) | Won 2-1 | +181500 |
| 3standard | 600 | Ueno, Taro (1500) | Won 2-0 | +181518 |
| 4standard | 295 | Nakamoto, Ryuuta (1550) | Lost 1-2 | -171501 |
| 5standard | 623 | Suzuki, Keisuke (1581) | Lost 0-2 | -171484 |
| top | average opponent: 1523record: 2-3 | new rating: 1484 | ||