Iwata, Mitsuhiro
Current rating: 1728 (#4876)
Record: 43-26-1
| Grand Prix Kobe 2017 (modern) | starting rating: 1669 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 639 | Tamai, Yuno (1594) | Won 2-0 | +171686 |
| 2modern | 436 | Komaki, Naoki (1684) | Won 2-1 | +181704 |
| 3modern | 366 | Okino, Ryuu (1670) | Won 2-0 | +171721 |
| 4modern | 315 | Watanabe, Takefumi (1581) | Lost 0-2 | -201701 |
| 5modern | 375 | Yasuda, Takaaki (1477) | Won 2-0 | +141715 |
| 6modern | 173 | Watanabe, Yuta (1696) | Lost 1-2 | -181697 |
| 7modern | 336 | Yoshizawa, Kaoru (1538) | Won 2-0 | +151712 |
| 8modern | 238 | Yamamoto, Ryoichi (1631) | Lost 0-2 | -201692 |
| 9modern | 347 | Takada, Ryuto (1735) | Won 2-0 | +191711 |
| 10modern | 227 | Kawasaki, Takeshi (1491) | Won 2-0 | +141725 |
| 11modern | 225 | Mizuno, Masahito (1607) | Lost 1-2 | -201705 |
| 12modern | 290 | Hee, Chung Wye (1438) | Won 2-1 | +131718 |
| 13modern | 237 | Ryan, Hughes (1579) | Lost 1-2 | -201698 |
| 14modern | 206 | Satou, Kenji (1578) | Won 2-1 | +151713 |
| 15modern | 183 | Hunamoto, Yuuki (1543) | Won 2-1 | +151728 |
| top | average opponent: 1589record: 10-5 | new rating: 1728 | ||
| Grand Prix Kyoto 2015 (legacy) | starting rating: 1714 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 272 | Calvo, Fernando (1650) | Won 2-0 | +171731 |
| 2legacy | 214 | Nukita, Yosuke (1512) | Lost 1-2 | -221709 |
| 3legacy | 235 | Maeno.J, Kazushi (1551) | Won 2-1 | +151724 |
| 4legacy | 271 | Takemura, Yoshiyuki (1488) | Won 2-0 | +141738 |
| 5legacy | 77 | Ishihara, Jun (1605) | Lost 0-2 | -211717 |
| 6legacy | 223 | Fukaya, Yuta (1455) | Won 2-0 | +141731 |
| 7legacy | 135 | Sabanai, Taichi (1536) | Lost 1-2 | -221709 |
| 8legacy | 151 | Endoh, Hiroki (1460) | Lost 0-2 | -221687 |
| 9legacy | 159 | Okamoto, Jin (1730) | Lost 0-2 | -181669 |
| top | average opponent: 1554record: 4-5 | new rating: 1669 | ||
| Grand Prix Kobe 2014 (modern) | starting rating: 1695 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 388 | Abe, Masahide (1415) | Won 2-0 | +131708 |
| 2modern | 36 | Nakamura, Masanobu (1499) | Won 2-0 | +141722 |
| 3modern | 64 | Nakamura, Kimikazu (1484) | Lost 1-2 | -221700 |
| 4modern | 258 | Kurihara, Yuuji (1564) | Lost 1-2 | -201680 |
| 5modern | 397 | Nakazawa, Yusuke (1348) | Won 2-1 | +121692 |
| 6modern | 261 | Nishino, Takanori (1468) | Won 2-0 | +141706 |
| 7modern | 253 | Komine, Fumiya (1543) | Lost 1-2 | -211685 |
| 8modern | 223 | Saotome, Yukiyo (1461) | Won 2-1 | +141699 |
| 9modern | 186 | Masuda, Jyunya (1544) | Won 2-0 | +151714 |
| top | average opponent: 1481record: 6-3 | new rating: 1714 | ||
| Grand Prix Nagoya 2012 (RTR standard) | starting rating: 1512 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 36 | Mizuno, Soichiro (1500) | Won 2-0 | +181530 |
| 2standard | 4 | Nishio, Tomonori (1518) | Lost 1-2 | -181512 |
| 3standard | 462 | Okamoto, Ryosuke (1542) | Won 2-0 | +181530 |
| 4standard | 393 | Matsuo, Hirokazu (1557) | Won 2-0 | +191549 |
| 5standard | 257 | Sugimoto, Yuuki (1570) | Won 2-0 | +181567 |
| 6standard | 146 | Furusato, Hiroshi (1594) | Won 2-1 | +191586 |
| 7standard | 119 | Sasamoto, Yuko (1555) | Won 2-0 | +171603 |
| 8standard | 73 | Kinpara, Tsunahiro (1536) | Won 2-0 | +171620 |
| 9standard | 9 | Suzuki, Akiyoshi (1522) | Lost 0-2 | -201600 |
| 10standard | 94 | Kobayashi, Akihiro (1513) | Won 2-1 | +161616 |
| 11standard | 24 | Miyauchi, Makoto (1704) | Lost 1-2 | -161600 |
| 12standard | 76 | Sone, Hirotoshi (1565) | Won 2-1 | +171617 |
| 13standard | 61 | Nuruki, Hiroaki (1615) | Won 0-0 | +181635 |
| 14standard | 26 | Nishikawa, Tomoya (1614) | Won 2-0 | +181653 |
| 15standard | 24 | Hirose, Daisuke (1851) | Won 2-1 | +221675 |
| 16standard | 18 | Hagiwara, Noriyuki (1809) | Won 2-1 | +201695 |
| top | average opponent: 1598record: 13-3 | new rating: 1695 | ||
| Grand Prix Hiroshima 2011 (ISD standard) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 137 | Usami, Taro (1636) | Won 2-1 | +211487 |
| 2standard | 151 | Hassaku, Jinpei (1689) | Won 2-1 | +221509 |
| 3standard | 17 | Ryousuke S., (1536) | Won 2-1 | +181527 |
| 4standard | 46 | Kumeyama, Yuji (1500) | Lost 0-2 | -181509 |
| 5standard | 103 | Sakamoto, Naruhiko (1538) | Won 2-1 | +181527 |
| 6standard | 48 | Wada, Yuki (1571) | Lost 0-2 | -171510 |
| 7standard | 122 | Matsuda, Issui (1673) | Lost 0-2 | -151495 |
| 8standard | 129 | Horie, Tooru (1527) | Draw 1-1 | +11496 |
| 9standard | 125 | Machida, Takatoshi (1404) | Won 2-1 | +161512 |
| top | average opponent: 1564record: 5-3-1 | new rating: 1512 | ||
| Grand Prix Nagoya 2004 (5DN standard) | starting rating: 1502 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 88 | Aoyama, Katsuhiko (1501) | Won 2-0 | +181520 |
| 3standard | 38 | Nomura, Eiji (1670) | Lost 0-2 | -151505 |
| 4standard | 242 | Morita, Masayuki (1390) | Lost 0-2 | -201485 |
| 5standard | 258 | Kiuchi, Satoru (1456) | Lost 1-2 | -191466 |
| top | average opponent: 1504record: 1-3 | new rating: 1466 | ||
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 24 | Kato, Shinya (1500) | Won 2-0 | +181518 |
| 2block | 127 | Yamaguchi, Tetsuya (1543) | Won 2-0 | +181536 |
| 3block | 40 | Yokoi, Masaki (1569) | Lost 1-2 | -171519 |
| 4block | 142 | Nishioka, Kazuya (1487) | Won 2-0 | +171536 |
| 5block | 117 | Date, Tsutomu (1540) | Lost 0-2 | -171519 |
| 6block | 129 | Ishii, Taisuke (1566) | Lost 1-2 | -181501 |
| 7block | 211 | Kikuchi, Yuuji (1563) | Won 2-0 | +201521 |
| 8block | 132 | Yamamoto, Kentaro (1502) | Lost 1-2 | -191502 |
| top | average opponent: 1534record: 4-4 | new rating: 1502 | ||