Mamiya, Takumi
Current rating: 1410
Record: 21-26 (GP) / 1-6 (professional)
| Grand Prix Kobe 2015 (BFZ standard) | starting rating: 1444 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 500 | Abe, Masahide (1340) | Lost 1-2 | -201424 |
| 4standard | 598 | Yamada, Masato (1536) | Lost 1-2 | -161408 |
| 5standard | 771 | Onishi, Ryosuke (1447) | Won 2-0 | +191427 |
| 6standard | 436 | Ogawara, Youhei (1470) | Lost 0-2 | -171410 |
| top | average opponent: 1448record: 1-3 | new rating: 1410 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1471 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 896 | Sekiguchi, Ichiki (1561) | Lost 1-2 | -161455 |
| 4sealed | 940 | Yamaguchi, Hiroshi2043 (1517) | Won 2-0 | +191474 |
| 5sealed | 911 | Sasaki, Yuuki (1520) | Lost 0-2 | -171457 |
| 6sealed | 996 | Suzuki, Kei (1756) | Lost 0-2 | -131444 |
| top | average opponent: 1589record: 1-3 | new rating: 1444 | ||
| Grand Prix Shizuoka 2015 (KTK limited) | starting rating: 1486 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 208 | Muranaka, Hiroya (1644) | Lost 0-2 | -151471 |
| top | record: 0-1 | new rating: 1471 | ||
| Grand Prix Kobe 2014 (modern) | starting rating: 1437 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 931 | Mita, Shohei (1498) | Lost 0-2 | -171420 |
| 3modern | 998 | Kaneda, Yuuji (1498) | Won 2-0 | +201440 |
| 4modern | 850 | Katou, Keigo (1505) | Won 2-0 | +191459 |
| 5modern | 828 | Takenouchi, Tatsuya (1576) | Won 2-0 | +201479 |
| 6modern | 811 | Ikeda, Taiki (1518) | Lost 0-2 | -171462 |
| 7modern | 812 | Emi, Shin'ichirou (1522) | Won 2-1 | +191481 |
| 8modern | 787 | Suzuike, Fumiyasu (1673) | Won 2-1 | +211502 |
| 9modern | 741 | Inui, Takashi (1627) | Lost 1-2 | -161486 |
| top | average opponent: 1552record: 5-3 | new rating: 1486 | ||
| Pro Tour Journey into Nyx (Theros block) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 1draft | 48 | Colomei, Rares-Glad (1560) | Lost 1-2 | -171487 |
| 3draft | 64 | Marino, Lee (1566) | Lost 0-2 | -171470 |
| 4block | 113 | Mann, Stephen (1945) | Lost 0-2 | -101460 |
| 5block | 148 | Arnoldy, Brian (1538) | Lost 1-2 | -171443 |
| 6block | 160 | Mead, Hank (1627) | Won 2-1 | +221465 |
| 7block | 131 | Rutar, Andrej (1867) | Lost 1-2 | -111454 |
| 8block | 146 | Desjardins, Ivan (1526) | Lost 1-2 | -171437 |
| top | average opponent: 1661record: 1-6 | new rating: 1437 | ||
| Grand Prix Nagoya 2014 (BNG limited) | starting rating: 1497 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 584 | Lim, Jeongmuk (1552) | Won 2-1 | +191516 |
| 5sealed | 545 | Aoki, Yoshitsugu (1628) | Lost 1-2 | -161500 |
| 6sealed | 538 | Suzuki, Kei (1616) | Lost 1-2 | -161484 |
| 7sealed | 583 | Oomae, Kiyotaka (1537) | Won 2-1 | +191503 |
| 8sealed | 572 | Shinohara, Kazuaki (1582) | Won 2-1 | +191522 |
| 9sealed | 548 | Yokota, Masaaki (1484) | Lost 1-2 | -181504 |
| top | average opponent: 1566record: 3-3 | new rating: 1504 | ||
| Grand Prix Shizuoka 2013 (THS standard) | starting rating: 1486 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 21 | Hattori, Taiki (1698) | Lost 0-2 | -151471 |
| 4standard | 236 | Seko, Kazuki (1520) | Won 2-1 | +191490 |
| 5standard | 156 | Takahashi, Dai (1661) | Lost 0-2 | -151475 |
| 6standard | 212 | Sugimura, Yoshiyasu (1594) | Won 2-0 | +201495 |
| 7standard | 127 | Inagaki, Yukihiro (1487) | Won 2-1 | +181513 |
| 8standard | 62 | Saitou, Hidetaka (1585) | Lost 0-2 | -161497 |
| top | average opponent: 1591record: 3-3 | new rating: 1497 | ||
| Grand Prix Nagoya 2012 (RTR standard) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 4standard | 160 | Dan, Takuya (1666) | Lost 1-2 | -151467 |
| 5standard | 291 | Watanabe, Kenji (1577) | Won 2-0 | +201487 |
| 6standard | 133 | Furukawa, Kouki (1558) | Won 2-1 | +191506 |
| 7standard | 105 | Lee, Ki PPeum (1496) | Won 2-1 | +181524 |
| 8standard | 72 | Kawahara, Ryouta (1586) | Won 2-0 | +191543 |
| 9standard | 13 | Shiraishi, Ryou (1669) | Won 2-1 | +211564 |
| 10standard | 9 | Aryabhima, Rahman (1610) | Lost 0-2 | -181546 |
| 11standard | 44 | Isogami, Kazuma (1569) | Lost 1-2 | -171529 |
| 12standard | 80 | Tsuboyama, Shuta (1558) | Won 2-1 | +181547 |
| 13standard | 58 | Matsumoto, Yuki1423 (1763) | Lost 0-0 | -141533 |
| 14standard | 68 | Kawakami, Hiroshi (1832) | Lost 1-2 | -131520 |
| 15standard | 66 | Matsubara, Tohru (1558) | Lost 0-2 | -171503 |
| 16standard | 71 | Yohara, Tosho (1524) | Lost 1-2 | -171486 |
| top | average opponent: 1613record: 6-7 | new rating: 1486 | ||
| Grand Prix Kobe 2012 (DKA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 281 | Tukamoto, Takuya (1525) | Lost 0-2 | -181482 |
| 2sealed | 427 | Nasu, Kenichi (1463) | Won 2-1 | +181500 |
| 3sealed | 289 | Nagai, Fukutarou (1501) | Won 2-0 | +181518 |
| 4sealed | 297 | Ooba, Hideto (1477) | Lost 1-2 | -191499 |
| 5sealed | 312 | Kanno, Masayoshi (1518) | Lost 0-2 | -171482 |
| top | average opponent: 1497record: 2-3 | new rating: 1482 | ||