Iwamura, Ryouichi
Current rating: 1548
Record: 43-46-2
Grand Prix Yokohama 2003Grand Prix Yokohama 2013Grand Prix Chiba 2015Grand Prix Tokyo 2016Grand Prix Shizuoka 2017Grand Prix Kobe 2017Grand Prix Chiba 2018Grand Prix Hong Kong 2018Grand Prix Shizuoka 2018 (standard)Grand Prix Kyoto 2019Grand Prix Yokohama 2019Grand Prix Chiba 2019Grand Prix Bangkok 2019
| Grand Prix Bangkok 2019 (ELD limited) | starting rating: 1552 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 121 | Chan, Sze Hang (2022) | Lost 0-2 | -101542 |
| 3sealed | 232 | Naknakled, Nash (1483) | Won 2-0 | +171559 |
| 4sealed | 118 | Nakano, Fumiki (1720) | Lost 0-2 | -151544 |
| 5sealed | 201 | Wu, Kon Fai (1878) | Won 2-0 | +241568 |
| 6sealed | 197 | Kawatsu, Shunsuke (1450) | Lost 0-2 | -201548 |
| top | average opponent: 1711record: 2-3 | new rating: 1548 | ||
| Grand Prix Chiba 2019 (M20 limited) | starting rating: 1524 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 325 | Matsuda, Yukio (1797) | Lost 1-2 | -131511 |
| 3sealed | 644 | Nuruki, Hiroaki (1885) | Won 2-0 | +241535 |
| 4sealed | 615 | Wakita, Daiki (1470) | Won 2-0 | +171552 |
| 5sealed | 267 | Ookura, Yasuhiro (1583) | Lost 0-2 | -181534 |
| 6sealed | 536 | Ishino, Katsunori (1570) | Won 2-0 | +191553 |
| 7sealed | 470 | Fujikawa, Daisuke (1526) | Won 2-1 | +181571 |
| 8sealed | 340 | Masuda, Satoshi (1551) | Lost 1-2 | -191552 |
| top | average opponent: 1626record: 4-3 | new rating: 1552 | ||
| Grand Prix Yokohama 2019 (modern) | starting rating: 1424 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 549 | Tateiwa, Masato (1380) | Won 2-0 | +171441 |
| 2modern | 528 | Choi, Minseok (1323) | Won 2-0 | +161457 |
| 3modern | 39 | Iwashita, Shuta (1534) | Won 2-0 | +191476 |
| 4modern | 261 | Nakamura, Shuta (1518) | Lost 1-2 | -171459 |
| 5modern | 348 | Murata, Tetsuhiro (1503) | Won 2-0 | +191478 |
| 6modern | 115 | Nishimoto, Takuya (1632) | Won 2-1 | +201498 |
| 7modern | 154 | Suzuki, Higashi (1578) | Draw 1-1 | +21500 |
| 8modern | 118 | Furuta, Yasutaka (1579) | Won 2-1 | +191519 |
| 9modern | 70 | Nakashima, Yuuya (1574) | Won 2-0 | +191538 |
| 10modern | 40 | Kondou, Masaki (1637) | Won 2-1 | +201558 |
| 11modern | 21 | Nagai, Mamoru (1780) | Won 2-0 | +221580 |
| 12modern | 12 | Shiota, Fumihiko (1942) | Lost 1-2 | -121568 |
| 13modern | 35 | Nanba, Naoya (1990) | Lost 0-2 | -101558 |
| 14modern | 67 | Murakami, Yuuki 5742 (1542) | Lost 1-2 | -191539 |
| 15modern | 99 | Ishijima, Kazuya (1663) | Lost 0-2 | -151524 |
| top | average opponent: 1612record: 9-5-1 | new rating: 1524 | ||
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1406 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 306 | Mori, Takeshi (1700) | Lost 0-2 | -121394 |
| 2standard | 555 | Mizuno, Nobuyoshi (1425) | Won 2-0 | +181412 |
| 3standard | 786 | Hirooka, Hideki (1464) | Won 2-1 | +191431 |
| 4standard | 434 | Ohno, Isao (1620) | Lost 1-2 | -151416 |
| 5standard | 644 | Shinoda, Takayuki (1490) | Won 2-0 | +201436 |
| 6standard | 524 | Sasaki, Kensuke (1560) | Lost 0-2 | -161420 |
| 7standard | 484 | Osaka, Yusuke (1493) | Won 2-1 | +191439 |
| 8standard | 421 | Wang, Weiliang (1563) | Lost 1-2 | -151424 |
| top | average opponent: 1539record: 4-4 | new rating: 1424 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1418 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 722 | Mita, Hiroki (1400) | Won 2-1 | +171435 |
| 2standard | 442 | Enomoto, Yasumasa (1517) | Won 2-0 | +201455 |
| 3standard | 299 | Ino, Keita (1565) | Lost 0-2 | -161439 |
| 4standard | 430 | Adachi, Yoshiya (1581) | Lost 1-2 | -161423 |
| 5standard | 711 | Yamazaki, Masaomi (1474) | Lost 0-2 | -171406 |
| top | average opponent: 1508record: 2-3 | new rating: 1406 | ||
| Grand Prix Hong Kong 2018 (modern) | starting rating: 1462 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 194 | Chen, Qu (1825) | Lost 1-2 | -121450 |
| 2modern | 220 | Nicolaou, Nektarios (1698) | Lost 1-2 | -141436 |
| 3modern | 378 | Ng, Chi Sang (1464) | Won 2-1 | +191455 |
| 4modern | 308 | Liu, Yi Pang (1436) | Lost 0-2 | -191436 |
| 5modern | 366 | Soesanto, Michael (1393) | Lost 1-2 | -181418 |
| top | average opponent: 1563record: 1-4 | new rating: 1418 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1453 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 231 | Shen, Shiyang (1550) | Lost 1-2 | -171436 |
| 2sealed | 856 | Kamiyama, Yuji (1491) | Won 2-0 | +191455 |
| 3sealed | 780 | Ishiwada, Hiroyuki (1804) | Won 2-0 | +241479 |
| 4sealed | 754 | Wen, Yi (1507) | Lost 1-2 | -171462 |
| 5sealed | 552 | Shimura, Seiji (1493) | Won 2-0 | +191481 |
| 6sealed | 412 | Takami, Yuta7701 (1490) | Lost 1-2 | -181463 |
| 7sealed | 599 | Maeda, Dai (1481) | Lost 0-2 | -181445 |
| 8sealed | 512 | Ogyu, Yoshiyuki (1360) | Won 2-0 | +171462 |
| top | average opponent: 1522record: 4-4 | new rating: 1462 | ||
| Grand Prix Kobe 2017 (modern) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 336 | Shiraki, Takahiro (1788) | Lost 0-2 | -131491 |
| 4modern | 555 | Tanaka, Masataka (1484) | Lost 0-2 | -181473 |
| 5modern | 817 | Nagai, Sho (1452) | Won 2-1 | +181491 |
| 6modern | 454 | Morikawa, Takayuki (1490) | Lost 0-2 | -181473 |
| 7modern | 954 | Mori, Hisayuki (1450) | Lost 0-2 | -191454 |
| 8modern | 866 | Jinnai, Ryosuke (1439) | Won 2-0 | +181472 |
| 9modern | 672 | Tomomizu, Takuya (1395) | Lost 0-2 | -191453 |
| top | average opponent: 1500record: 2-5 | new rating: 1453 | ||
| Grand Prix Shizuoka 2017 (AER standard) | starting rating: 1539 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 365 | Kajiwara, Shou (1608) | Lost 1-2 | -171522 |
| 3standard | 1079 | Kaido, Yoshiaki (1356) | Won 2-0 | +151537 |
| 4standard | 406 | Makino, Hiroyuki (1534) | Lost 1-2 | -181519 |
| 5standard | 917 | Tanaka, Yuichi (1641) | Lost 0-2 | -161503 |
| 6standard | 1073 | Nomura, Hiroshi (1497) | Won 2-0 | +181521 |
| 7standard | 933 | Takeuchi, Akinari (1572) | Lost 1-2 | -171504 |
| 8standard | 858 | Tsunoda, Yotaro (1455) | Won 2-1 | +171521 |
| 9standard | 650 | Onikiri, Yuichi (1585) | Lost 1-2 | -171504 |
| top | average opponent: 1531record: 3-5 | new rating: 1504 | ||
| Grand Prix Tokyo 2016 (SOI standard) | starting rating: 1502 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 275 | Haruma, Sudo (1500) | Won 2-1 | +181520 |
| 2standard | 581 | Yoshida, Goh (1516) | Won 2-1 | +181538 |
| 3standard | 27 | Nakaso, Kouji (1618) | Won 2-0 | +191557 |
| 4standard | 146 | Harashima, Kenichi (1563) | Draw 1-1 | 01557 |
| 5standard | 200 | Mitsuzane, Yuichi (1521) | Lost 0-2 | -191538 |
| 6standard | 481 | Hichiwa, Toshito (1536) | Won 2-0 | +181556 |
| 7standard | 277 | Burger, Martin (1569) | Lost 1-2 | -171539 |
| 8standard | 477 | Mori, Genki (1554) | Won 2-1 | +181557 |
| 9standard | 340 | Niwa, Kohei (1542) | Lost 1-2 | -181539 |
| top | average opponent: 1547record: 5-3-1 | new rating: 1539 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1011 | Yoshida, Tsubasa (1500) | Won 2-1 | +191502 |
| top | record: 1-0 | new rating: 1502 | ||
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 130 | Matoba, Takashi (1679) | Lost 0-2 | -151483 |
| 2sealed | 362 | Sakamoto, Ryouhei (1448) | Won 2-1 | +181501 |
| 3sealed | 375 | Matsumoto, Nozomu (1539) | Lost 1-2 | -181483 |
| top | average opponent: 1555record: 1-2 | new rating: 1483 | ||
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 216 | Oonishi, Tatsuya (1500) | Won 2-0 | +181518 |
| 2block | 189 | Ishigami, Kei (1510) | Lost 0-2 | -181500 |
| 3block | 293 | Iwama, Shingo (1500) | Lost 1-2 | -181482 |
| 4block | 341 | Kiyotaki, Masahiro (1482) | Won 2-1 | +181500 |
| 5block | 272 | Ebisawa, Yuu (1499) | Won 2-0 | +181518 |
| 6block | 120 | Hamamoto, Kenji (1456) | Lost 0-2 | -191499 |
| 7block | 191 | Noji, Keniti (1504) | Won 2-1 | +181517 |
| 8block | 145 | Ikeda, Takashi (1504) | Won 2-1 | +181535 |
| 9block | 115 | Hirose, Yuuki (1569) | Lost 1-2 | -181517 |
| 10block | 116 | Sasaki, Yusuke (Tokyo) (1453) | Lost 0-2 | -191498 |
| top | average opponent: 1498record: 5-5 | new rating: 1498 | ||