Kubomura, Masaaki
Current rating: 1359
Record: 21-35-1
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1369 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 140 | Shirahata, Gen (1584) | Won 2-1 | +221391 |
| 2sealed | 401 | Yasue, Hayato (1483) | Lost 0-2 | -161375 |
| 3sealed | 756 | Shimura, Seiji (1476) | Lost 1-2 | -161359 |
| top | average opponent: 1514record: 1-2 | new rating: 1359 | ||
| Grand Prix Nagoya 2016 (OGW limited) | starting rating: 1369 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 407 | Miyahara, Eiji (1394) | Won 2-0 | +191388 |
| 2sealed | 367 | Takagishi, Hidefumi (1539) | Won 2-1 | +201408 |
| 3sealed | 42 | Sasaoka, Hirohito (1454) | Lost 0-2 | -171391 |
| 4sealed | 691 | Ogawa, Yohei (1584) | Lost 1-2 | -141377 |
| 5sealed | 797 | Boss, Matt (1502) | Won 2-0 | +201397 |
| 6sealed | 566 | Arikawa, Shuntarou (1520) | Lost 0-2 | -161381 |
| 7sealed | 804 | Inukai, Yuta (1575) | Won 2-0 | +221403 |
| 8sealed | 460 | Katayama, Koujun (1460) | Lost 1-2 | -171386 |
| 9sealed | 576 | Kikuti, Yuudai (1474) | Lost 0-2 | -171369 |
| top | average opponent: 1500record: 4-5 | new rating: 1369 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1396 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 161 | Shibuya, Yusuke (1500) | Draw 1-1 | +21398 |
| 2sealed | 314 | Ogihara, Reona (1504) | Won 2-0 | +201418 |
| 3sealed | 256 | Hosoya, Yusuke (1520) | Lost 1-2 | -161402 |
| 4sealed | 376 | Shioe, Tsugukuni (1399) | Lost 1-2 | -181384 |
| 5sealed | 428 | Amayasu, Kazunori (1383) | Won 2-0 | +181402 |
| 6sealed | 331 | Ablack, Mukesh (1483) | Won 2-1 | +191421 |
| 7sealed | 243 | Kawagishi, Genki (1517) | Lost 1-2 | -161405 |
| 8sealed | 213 | Matsuoka, Kenshi (1466) | Lost 0-2 | -171388 |
| 9sealed | 177 | Abe, Masahide (1321) | Lost 0-2 | -191369 |
| top | average opponent: 1455record: 3-5-1 | new rating: 1369 | ||
| Grand Prix Shizuoka 2015 (KTK limited) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 920 | Kageyama, Tarou (1613) | Lost 0-2 | -151431 |
| 2sealed | 1025 | Nakano, Shinji (1466) | Lost 1-2 | -181413 |
| 3sealed | 1089 | Sakamine, Takayuki (1465) | Lost 0-2 | -171396 |
| top | average opponent: 1515record: 0-3 | new rating: 1396 | ||
| Grand Prix Nagoya 2014 (BNG limited) | starting rating: 1400 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 49 | Saitou, Hokuto (1464) | Lost 1-2 | -171383 |
| 2sealed | 252 | Nihongi, Yuta (1403) | Won 2-0 | +181401 |
| 3sealed | 306 | Ootsuka, Yuusuke (1692) | Lost 0-2 | -131388 |
| 4sealed | 331 | Matsuura, Taiki (1465) | Won 2-0 | +201408 |
| 5sealed | 311 | Matsumura, Toshikazu (1542) | Won 2-1 | +201428 |
| 6sealed | 136 | Matsui, Toshinori (1521) | Won 2-0 | +201448 |
| 7sealed | 101 | Mori, Katsuhiro (1987) | Lost 0-2 | -91439 |
| 8sealed | 155 | Tabata, Yuusuke (1597) | Lost 0-2 | -151424 |
| 9sealed | 164 | Wang, Peizhe (1653) | Won 2-0 | +221446 |
| top | average opponent: 1592record: 5-4 | new rating: 1446 | ||
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1413 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 667 | Tamura, Kenji (1500) | Lost 1-2 | -161397 |
| 2sealed | 987 | Ishii, Ryouta (1456) | Won 2-1 | +191416 |
| 3sealed | 1039 | Mori, Yusei (1500) | Lost 0-2 | -161400 |
| top | average opponent: 1485record: 1-2 | new rating: 1400 | ||
| Grand Prix Kobe 2012 (DKA limited) | starting rating: 1400 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 222 | Kabashima, Takuya (1500) | Lost 0-2 | -161384 |
| 2sealed | 416 | Sonohara, Takashi (1467) | Won 2-0 | +201404 |
| 3sealed | 264 | Sesumi, Yusuke (1501) | Won 2-0 | +191423 |
| 4sealed | 269 | Naruse, Yoshiki (1483) | Lost 1-2 | -171406 |
| 5sealed | 383 | Aka, Shunsuke (1734) | Won 2-0 | +241430 |
| 6sealed | 224 | Tabata, Yuusuke (1502) | Lost 0-2 | -171413 |
| top | average opponent: 1531record: 3-3 | new rating: 1413 | ||
| Grand Prix Kitakyushu 2009 (ZEN limited) | starting rating: 1378 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 116 | Sakamoto, Naoki (1377) | Won 2-0 | +181396 |
| 2sealed | 48 | Kumazaki, Taisuke (1517) | Won 2-0 | +201416 |
| 3sealed | 19 | Kumoura, Daisuke (1832) | Lost 0-2 | -101406 |
| 4sealed | 157 | Ishii, Hayato (1807) | Lost 0-2 | -111395 |
| 5sealed | 125 | Takahashi, Junya (1582) | Won 2-0 | +211416 |
| 6sealed | 127 | Oono, Hirofumi (1539) | Lost 0-2 | -161400 |
| top | average opponent: 1609record: 3-3 | new rating: 1400 | ||
| Grand Prix Kobe 2009 (extended) | starting rating: 1410 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 23 | Nishimoto, Takuya (1403) | Won 2-0 | +181428 |
| 2extended | 28 | Utsumi, Hironobu (1452) | Lost 1-2 | -171411 |
| 3extended | 122 | Wada, Shouhei (1518) | Lost 0-2 | -161395 |
| 4extended | 241 | Murakami, Keisuke (1484) | Lost 0-2 | -171378 |
| top | average opponent: 1464record: 1-3 | new rating: 1378 | ||
| Grand Prix Kitakyushu 2007 (LRW limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 67 | Ehara, Yoshihide (1500) | Lost 1-2 | -171447 |
| 2sealed | 101 | Onoda, Hikaru (1418) | Lost 0-2 | -191428 |
| 3sealed | 143 | Goto, Muneharu (1444) | Lost 1-2 | -181410 |
| top | average opponent: 1454record: 0-3 | new rating: 1410 | ||
| Grand Prix Kyoto 2000 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 175 | Ura, Tsuyoshi (1500) | Lost 1-2 | -181482 |
| 2extended | 197 | Tatsuhara, Satoshi (1482) | Lost 0-2 | -181464 |
| top | average opponent: 1491record: 0-2 | new rating: 1464 | ||