Yamakawa, Youichirou
Current rating: 1509
Record: 69-62 (GP) / 4-12 (professional)
- 1998
- 2000
- 2001
- 2002
- 2005
- 2008
- 2009
- 2010
- 2011
| Grand Prix Kobe 2011 (extended) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 26 | Koretomo, Yuji (1480) | Lost 0-2 | -181466 |
| 2extended | 279 | M., Toshiya (1482) | Won 2-1 | +181484 |
| 3extended | 140 | Hasegawa, Tsuguto (1417) | Lost 0-2 | -191465 |
| 4extended | 291 | Umemura, Hideaki (1483) | Won 2-1 | +181483 |
| 5extended | 243 | Abe, Ken'Ichi (1523) | Won 2-0 | +191502 |
| 6extended | 168 | Sugiyama, Yuya (1672) | Lost 0-2 | -151487 |
| 7extended | 180 | Suzuki, Keisuke (1599) | Won 2-1 | +201507 |
| 8extended | 126 | Michinaka, Shota (1471) | Won 2-0 | +181525 |
| 9extended | 87 | Ikedo, Masakazu (1656) | Lost 0-2 | -161509 |
| top | average opponent: 1531record: 5-4 | new rating: 1509 | ||
| Grand Prix Sendai 2010 (ROE standard) | starting rating: 1541 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 254 | Imai, Ayato (1500) | Lost 1-2 | -191522 |
| 2standard | 246 | Kanno, Ryouji (1462) | Lost 0-2 | -191503 |
| 3standard | 334 | Fujisato, Hiroshi (1455) | Lost 1-2 | -191484 |
| top | average opponent: 1472record: 0-3 | new rating: 1484 | ||
| Grand Prix Yokohama 2010 (extended) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 426 | Toujou, Madoka (1500) | Won 2-1 | +181536 |
| 2extended | 90 | Ishimaru, Ken (1736) | Lost 0-2 | -151521 |
| 3extended | 312 | Natsume, Takuya (1450) | Lost 1-2 | -191502 |
| 4extended | 407 | Shiraishi, Ryou (1562) | Won 2-1 | +191521 |
| 5extended | 278 | Ooneda, Yoshihiro (1574) | Lost 0-2 | -171504 |
| 6extended | 310 | Terasawa, Kazuya (1713) | Won 2-0 | +221526 |
| 7extended | 245 | Sakamoto, Naoki (1397) | Won 2-0 | +161542 |
| 8extended | 157 | Kadono, Takayuki (1515) | Won 2-0 | +171559 |
| 9extended | 124 | Suzuki, Hiroumi (1547) | Lost 1-2 | -181541 |
| top | average opponent: 1555record: 5-4 | new rating: 1541 | ||
| Grand Prix Niigata 2009 (M10 limited) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 6 | Nii, Masanobu (1522) | Lost 1-2 | -181499 |
| 2sealed | 194 | Furukawa, Hiroyuki (1412) | Won 2-0 | +171516 |
| 3sealed | 172 | Takahashi, Junya (1595) | Won 2-0 | +191535 |
| 4sealed | 165 | Iwakami, Yuji (1504) | Lost 1-2 | -181517 |
| 5sealed | 184 | Kamiya, Shougo (1487) | Won 2-1 | +171534 |
| 6sealed | 146 | Tsukamoto, Tatsushi (1432) | Won 2-1 | +161550 |
| 7sealed | 84 | Murakami, Norichika (1687) | Lost 1-2 | -151535 |
| 8sealed | 123 | Yamada, Yuma (1611) | Lost 0-2 | -171518 |
| top | average opponent: 1531record: 4-4 | new rating: 1518 | ||
| Grand Prix Singapore 2009 (extended) | starting rating: 1555 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 96 | VALMARY, NICOLAS (1500) | Won 2-0 | +171572 |
| 2extended | 55 | Lim, Ernest (1601) | Lost 1-2 | -181554 |
| 3extended | 81 | Peng, Tie Lun John (1471) | Won 2-0 | +171571 |
| 4extended | 98 | Tan, Xing Yong (1548) | Won 2-0 | +171588 |
| 5extended | 53 | Tan, Chai Jing (1535) | Lost 0-2 | -191569 |
| 6extended | 109 | Lau, Sam Lei Kang (1786) | Lost 0-2 | -141555 |
| 7extended | 117 | Chu Heng, Eng (1501) | Lost 1-2 | -191536 |
| 8extended | 107 | Tan, Ian Keng Huat (1484) | Lost 1-2 | -191517 |
| top | average opponent: 1553record: 3-5 | new rating: 1517 | ||
| Grand Prix Taipei 2008 (ALA limited) | starting rating: 1558 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 27 | Lee, Hong (1518) | Won 2-1 | +171575 |
| 2sealed | 56 | Liu, Jiayang (1500) | Lost 1-2 | -191556 |
| 3sealed | 57 | Chou, Chi-Fong (1485) | Won 2-0 | +161572 |
| 4sealed | 75 | Lin, Grail (1518) | Won 2-0 | +171589 |
| 5sealed | 65 | Yang, Yu Wei (1561) | Won 2-1 | +181607 |
| 6sealed | 18 | Nakajima, Chikara (1814) | Lost 1-2 | -141593 |
| 7sealed | 53 | Su, Jee Hung (1545) | Lost 0-2 | -191574 |
| 8sealed | 55 | Wong, Chi Keung (1520) | Lost 1-2 | -191555 |
| top | average opponent: 1558record: 4-4 | new rating: 1555 | ||
| Grand Prix Manila 2008 (Lorwyn block) | starting rating: 1542 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 102 | Pangilinan, Arkein (1518) | Won 2-0 | +181560 |
| 3block | 22 | Sy, Wilheim (1536) | Lost 0-2 | -181542 |
| 4block | 103 | Madrid, Daven Rae (1517) | Lost 0-2 | -191523 |
| 5block | 211 | Bagaporo, John Anthony (1500) | Won 2-0 | +181541 |
| 6block | 163 | Altez, Elbert (1518) | Lost 0-2 | -191522 |
| 7block | 194 | Bausa, Patrick A (1501) | Won 2-0 | +181540 |
| 8block | 112 | Padre, Marvin Lloren (1536) | Won 2-0 | +181558 |
| top | average opponent: 1518record: 4-3 | new rating: 1558 | ||
| Pro Tour Philadelphia 2005 (Kamigawa block) | starting rating: 1562 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 155 | Hagon, Richard (1446) | Won 2-0 | +151577 |
| 2block | 46 | Still, Jim (1519) | Won 2-0 | +171594 |
| 3block | 33 | Wright, Stuart (1753) | Lost 0-2 | -151579 |
| 4block | 46 | Najafpoor, Omid (1549) | Lost 0-2 | -181561 |
| 5block | 57 | Diez del Corral, Juan (1543) | Lost 0-2 | -191542 |
| top | average opponent: 1562record: 2-3 | new rating: 1542 | ||
| Grand Prix Fukuoka 2002 (TOR limited) | starting rating: 1560 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 1 | Yokoyama, Shigehisa (1597) | Won 2-0 | +191579 |
| 3sealed | 38 | Shimizu, Akihiro (1539) | Won 2-1 | +171596 |
| 4sealed | 16 | Otsubo, Yuji (1655) | Won 2-0 | +191615 |
| 5sealed | 2 | Nagao, Hakaru (1444) | Won 2-0 | +151630 |
| 6sealed | 3 | Kuroda, Masashiro (1748) | Lost 0-2 | -161614 |
| 7sealed | 28 | Mouri, Takemasa (1557) | Lost 0-2 | -191595 |
| 8draft | 18 | Komiyama, Hideki (1628) | Won 2-0 | +191614 |
| 9draft | 12 | Sogabe, Ippei (1620) | Lost 0-2 | -181596 |
| 10draft | 27 | Nakazawa, Kazuhiro (1543) | Lost 0-2 | -191577 |
| 11draft | 28 | Imai, Kimio (1498) | Won 2-1 | +171594 |
| 12draft | 19 | Mori, Katsuhiro (1873) | Lost 0-2 | -141580 |
| 13draft | 27 | Shiki, Kazumasa (1530) | Lost 1-2 | -181562 |
| top | average opponent: 1603record: 6-6 | new rating: 1562 | ||
| Grand Prix Sendai 2001 (extended) | starting rating: 1547 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 57 | Endou, Takahiro (1455) | Won 2-0 | +171564 |
| 3extended | 64 | Shibuya, Kouichi (1471) | Won 2-0 | +161580 |
| 4extended | 44 | Kurasawa, Kanto (1700) | Lost 0-2 | -161564 |
| 5extended | 56 | Ota, Masane (1481) | Lost 0-2 | -191545 |
| 6extended | 79 | Eguchi, Hiroshi (1499) | Won 2-1 | +171562 |
| 7extended | 56 | Nakatani, Haruki (1515) | Won 2-1 | +171579 |
| 8extended | 46 | Murakami, Yuki (Osaka) (1530) | Lost 0-2 | -191560 |
| top | average opponent: 1522record: 4-3 | new rating: 1560 | ||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1524 | |||
| round | table | opponent (rating) | result | Δrating |
| 3block | 88 | Taniguchi, Tetsuya (1499) | Lost 1-2 | -181506 |
| 4block | 251 | Fujiwara, Daiki (1518) | Won 2-0 | +181524 |
| 5block | 133 | Wong, Nicholas Jonathan (1781) | Lost 1-2 | -131511 |
| 6block | 226 | Kimura, Keisuke (1517) | Won 2-0 | +181529 |
| 7block | 233 | Tadokoro, Masaya (1536) | Won 2-1 | +181547 |
| 8block | 154 | Suzuki, Takaaki (1576) | Lost 0-2 | -181529 |
| 9block | 126 | Kuroda, Ryouhei (1534) | Won 2-0 | +181547 |
| top | average opponent: 1566record: 4-3 | new rating: 1547 | ||
| Grand Prix Kaohsiung 2001 (PLS limited) | starting rating: 1561 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 21 | Cheung, Kee Yin Lawrence (1519) | Lost 0-2 | -191542 |
| 5sealed | 45 | Hwang, Wen Jien (1519) | Lost 0-2 | -181524 |
| 6sealed | 44 | Hwang, Chi-Chung (1569) | Lost 1-2 | -181506 |
| 7sealed | 59 | Yang, Yui Ming (1500) | Won 2-0 | +181524 |
| top | average opponent: 1527record: 1-3 | new rating: 1524 | ||
| Grand Prix Hiroshima 2001 (INV limited) | starting rating: 1548 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 172 | Okabayashi, Masanao (1582) | Lost 0-2 | -181530 |
| 2sealed | 159 | Hoshino, Hiroaki (1483) | Lost 0-2 | -191511 |
| 3sealed | 187 | Miyashige, Suguru (1465) | Won 2-0 | +171528 |
| 4sealed | 179 | Kunita, Tetsuya (1484) | Won 2-0 | +181546 |
| 5sealed | 110 | Kodama, Naoko (1499) | Won 2-0 | +171563 |
| 6sealed | 65 | Shiraki, Takahiro (1519) | Won 2-1 | +171580 |
| 7sealed | 46 | Sonoda, Naohiro (1508) | Lost 1-2 | -191561 |
| top | average opponent: 1506record: 4-3 | new rating: 1561 | ||
| Grand Prix Singapore 2000 (extended) | starting rating: 1632 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 18 | Teoh, Jeremy (1551) | Lost 1-2 | -201612 |
| 3extended | 61 | Ng, Jin King Benjamin (1500) | Lost 1-2 | -201592 |
| 4extended | 77 | Hiu, Choon Pien (1483) | Won 2-0 | +161608 |
| 5extended | 79 | La Faber, Sean Michael (1449) | Lost 0-2 | -211587 |
| 6extended | 80 | Vachiranon, Pongsuta (1481) | Lost 0-2 | -201567 |
| 7extended | 72 | Tan, Koon Liang (1464) | Lost 1-2 | -191548 |
| top | average opponent: 1488record: 1-5 | new rating: 1548 | ||
| Grand Prix Sydney 2000 (extended) | starting rating: 1569 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 3 | Ellis, Dean (1500) | Won 2-1 | +171586 |
| 3extended | 8 | Lin, Gordon (1518) | Lost 1-2 | -191567 |
| 4extended | 37 | Grain, Andrew (1519) | Won 2-0 | +171584 |
| 5extended | 21 | Connolly, Joe (1517) | Won 2-1 | +171601 |
| 6extended | 17 | West, Justin T (1520) | Won 2-0 | +161617 |
| 7extended | 7 | Nakamura, Satoshi (1753) | Lost 0-2 | -151602 |
| 8extended | 16 | Bruce, Bronwyn (1554) | Won 2-0 | +171619 |
| 9extended | 13 | Lightfoot, Anatoli (1521) | Lost 0-2 | -201599 |
| 10extended | 19 | Brugman, John (1525) | Won 2-1 | +171616 |
| 11extended | 11 | Speller, Sam (1574) | Won 2-0 | +171633 |
| 12extended | 12 | Kwan, Chris (1602) | Lost 0-2 | -191614 |
| 13extended | 11 | Gilligan, Steve (1587) | Won 2-1 | +181632 |
| top | average opponent: 1557record: 8-4 | new rating: 1632 | ||
| Grand Prix Kyoto 2000 (extended) | starting rating: 1423 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 89 | Murayama, Yu (1518) | Won 2-0 | +201443 |
| 3extended | 37 | Tsunesada, Yoshiharu (1500) | Won 2-1 | +191462 |
| 4extended | 18 | Ikeda, Tsuyoshi (1644) | Won 2-0 | +211483 |
| 5extended | 25 | Sato, Yusuke (1571) | Won 2-0 | +201503 |
| 6extended | 3 | Yamamoto, Nao (1554) | Won 2-0 | +191522 |
| 7extended | 5 | Higaki, Takao (1626) | Lost 0-2 | -171505 |
| 8extended | 24 | Nakamura, Satoshi (1764) | Won 2-0 | +231528 |
| 9extended | 6 | Miyamae, Tsuyoshi (1587) | Won 2-0 | +191547 |
| 10extended | 7 | Akase, Kouhei (1612) | Won 2-0 | +191566 |
| 11extended | 3 | Matsuzuki, Kyosuke (1642) | Won 2-1 | +201586 |
| 12extended | 1 | Itadani, Eisaku (1601) | Lost 1-2 | -181568 |
| 13extended | 4 | Tamber, Tobey (1611) | Lost 0-2 | -171551 |
| 14extended | 11 | Asahara, Akira (1578) | Won 2-0 | +181569 |
| top | average opponent: 1601record: 10-3 | new rating: 1569 | ||
| Grand Prix Sapporo 2000 (PCY limited) | starting rating: 1381 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 27 | Sugimoto, Takahiko (1518) | Won 2-1 | +211402 |
| 3sealed | 19 | Kita, Makoto (1623) | Won 2-1 | +221424 |
| 4sealed | 14 | Ikeda, Kei (1523) | Lost 0-2 | -171407 |
| 5sealed | 41 | Abe, Haruki (1535) | Won 2-1 | +211428 |
| 6sealed | 14 | Nakano, Fumiki (1537) | Won 2-0 | +201448 |
| 7sealed | 12 | Fukuchi, Takahiro (1572) | ID | 01448 |
| 8rochester | 12 | Tajiri, Satoshi (1575) | Lost 1-2 | -161432 |
| 9rochester | 24 | Hoshino, Fumio (1573) | Won 2-0 | +211453 |
| 10rochester | 15 | Kurosawa, Atsushi (1571) | Won 2-0 | +201473 |
| 11rochester | 12 | Yoshii, Tatsuo (1556) | Lost 0-2 | -171456 |
| 12rochester | 16 | Ikeda, Kei (1540) | Lost 1-2 | -161440 |
| 13rochester | 11 | Arita, Ryuichi (1498) | Lost 1-2 | -171423 |
| top | average opponent: 1552record: 6-5-1 | new rating: 1423 | ||
| Pro Tour New York 2000 (Masques block) | starting rating: 1448 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 50 | Komiya, Tadayoshi (1470) | Lost 0-2 | -181430 |
| 2block | 150 | Heilfron, Kenneth (1498) | Lost 1-2 | -161414 |
| 3block | 128 | Shuler, John (1490) | Lost 0-2 | -171397 |
| 4block | 146 | Nakamura, Satoshi (1517) | Lost 0-2 | -161381 |
| top | average opponent: 1494record: 0-4 | new rating: 1381 | ||
| Pro Tour Rome 1998 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 47 | Walamies, Tomi (1634) | Won 0-0 | +201520 |
| 2extended | 14 | Gary, Justin (1500) | Lost 0-2 | -181502 |
| 3extended | 49 | Solaja, Ivan (1500) | Won 0-0 | +181520 |
| 4extended | 41 | Labarre, Nicolas (1522) | Lost 0-0 | -181502 |
| 5extended | 55 | Pustilnik, Michael (1502) | Lost 0-0 | -181484 |
| 6extended | 98 | Yancey, David (1484) | Lost 0-0 | -181466 |
| 7extended | 94 | Galimbertti, Victor (1465) | Lost 0-0 | -181448 |
| top | average opponent: 1515record: 2-5 | new rating: 1448 | ||