Ozaki, Youichirou
Current rating: 1553
Record: 38-36-1
| Grand Prix Kobe 2014 (modern) | starting rating: 1561 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 757 | Hirota, Yuuji (1500) | Lost 1-2 | -191542 |
| 2modern | 1043 | Kawada, Kyogo (1450) | Lost 0-2 | -191523 |
| 3modern | 1223 | Iene, Ryota (1464) | Won 2-0 | +171540 |
| 4modern | 1192 | Yoshii, Shunsuke (1450) | Lost 0-2 | -201520 |
| 5modern | 1143 | Kato, Yusuke (1375) | Won 2-0 | +151535 |
| 6modern | 1044 | Yamagami, Yudai (1534) | Won 2-0 | +181553 |
| top | average opponent: 1462record: 3-3 | new rating: 1553 | ||
| Grand Prix Kitakyushu 2009 (ZEN limited) | starting rating: 1585 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 119 | Fujiki, Munemitsu (1500) | Won 2-1 | +161601 |
| 2sealed | 72 | Sawade, Makoto (1478) | Lost 1-2 | -201581 |
| 3sealed | 172 | Fujita, Daizen (1499) | Lost 1-2 | -201561 |
| top | average opponent: 1492record: 1-2 | new rating: 1561 | ||
| Grand Prix Okayama 2008 (ALA limited) | starting rating: 1575 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 184 | Asano, Kousuke (1500) | Won 0-0 | +171592 |
| 2sealed | 30 | Tayama, Yusuke (1450) | Lost 1-2 | -211571 |
| 3sealed | 107 | Nakajima, Gou (1562) | Won 2-0 | +181589 |
| 4sealed | 169 | Urata, Takurou (1471) | Draw 1-1 | -21587 |
| 5sealed | 141 | Shouyama, Youhei (1559) | Won 2-1 | +181605 |
| 6sealed | 46 | Maekawa, Takuya (1496) | Lost 0-2 | -201585 |
| top | average opponent: 1506record: 3-2-1 | new rating: 1585 | ||
| Grand Prix Kobe 2008 (Lorwyn block) | starting rating: 1536 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 60 | Hashimoto, Naoya (1517) | Won 2-0 | +181554 |
| 3block | 12 | Iwaki, Hiroyuki (1538) | Won 2-0 | +181572 |
| 4block | 31 | Nagao, Keisuke (1537) | Won 2-0 | +171589 |
| 5block | 22 | Fujimori, Masayoshi (1560) | Won 2-1 | +171606 |
| 6block | 12 | Ueda, Katsuya (1803) | Lost 0-2 | -141592 |
| 7block | 59 | Sutou, Takuo (1694) | Won 2-1 | +201612 |
| 8block | 12 | Yoshida, Hiroshi (1590) | Lost 0-2 | -191593 |
| 9block | 30 | Kimura, Kazuki (1591) | Lost 0-2 | -181575 |
| top | average opponent: 1604record: 5-3 | new rating: 1575 | ||
| Grand Prix Kyoto 2007 (PLC standard) | starting rating: 1476 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 24 | Aritaka, Ryouichi (1466) | Won 2-0 | +181494 |
| 2standard | 115 | Okabayashi, Masanao (1580) | Won 2-0 | +201514 |
| 3standard | 79 | Torigoe, Seitaro (1536) | Won 2-0 | +181532 |
| 4standard | 84 | Nishimura, Masaaki (1403) | Won 2-0 | +161548 |
| 5standard | 7 | Saitou, Yuu (1599) | Won 2-0 | +191567 |
| 6standard | 20 | Ito, Atsushi (1470) | Won 2-1 | +161583 |
| 7standard | 11 | Fujimoto, Takehiro (Osaka) (1543) | Lost 0-2 | -191564 |
| 8standard | 9 | Hirata, Minoru (1636) | Lost 0-2 | -161548 |
| 9standard | 67 | Kabeshita, Yoshito (1525) | Lost 0-2 | -191529 |
| 10standard | 50 | Miwa, Tatsuya (1580) | Won 2-0 | +191548 |
| 11standard | 41 | Ikushima, Yasuyuki (1560) | Won 2-1 | +181566 |
| 12standard | 7 | Taru, Genki (1765) | Lost 0-2 | -141552 |
| 13standard | 59 | Nakamura, Takahiro (1685) | Lost 1-2 | -161536 |
| top | average opponent: 1565record: 8-5 | new rating: 1536 | ||
| Grand Prix Hiroshima 2006 (CSP limited) | starting rating: 1474 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 19 | Ito, Jun (1530) | Won 2-0 | +191493 |
| 2sealed | 8 | Kudo, Hiroshi (1468) | Lost 0-2 | -191474 |
| 3sealed | 74 | Ura, Tsuyoshi (1530) | Won 2-0 | +191493 |
| 4sealed | 71 | Yamazaki, Takahiro (1463) | Won 2-0 | +181511 |
| 5sealed | 69 | Orihara, Jun (1576) | Lost 0-2 | -171494 |
| 6sealed | 104 | Kobayashi, Masanori (1524) | Lost 0-2 | -181476 |
| top | average opponent: 1515record: 3-3 | new rating: 1476 | ||
| Grand Prix Kitakyushu 2005 (extended) | starting rating: 1442 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 24 | Shimizu, Hideaki (1500) | Won 2-1 | +191461 |
| 2extended | 20 | Kou, Nobuaki (1447) | Won 2-1 | +171478 |
| 3extended | 18 | Takagi, Takeshi (1629) | Won 2-1 | +211499 |
| 4extended | 29 | Kubota, Kenta (1719) | Lost 1-2 | -141485 |
| 5extended | 25 | Ishida, Naoyuki (1552) | Lost 1-2 | -171468 |
| 6extended | 64 | Kataoka, Asami (1593) | Lost 0-2 | -151453 |
| 7extended | 67 | Kurakami, Shun (1623) | Won 2-0 | +211474 |
| top | average opponent: 1580record: 4-3 | new rating: 1474 | ||
| Grand Prix Yokohama 2004 (COK limited) | starting rating: 1434 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 112 | Yokoi, Masaki (1689) | Lost 0-2 | -141420 |
| 2sealed | 219 | Sawade, Makoto (1447) | Won 2-0 | +191439 |
| 3sealed | 209 | Arai, Riki (1394) | Won 2-0 | +171456 |
| 4sealed | 126 | Morofuji, Takuma (1660) | Lost 0-2 | -141442 |
| top | average opponent: 1548record: 2-2 | new rating: 1442 | ||
| Grand Prix Hiroshima 2003 (extended) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 100 | Komatsu, Toshiaki (1525) | Lost 0-2 | -171449 |
| 2extended | 121 | Tanaka, Toshifumi (1481) | Lost 0-2 | -171432 |
| 3extended | 169 | Tomita, Kayoko (1370) | Won 2-0 | +161448 |
| 4extended | 157 | Nakaduka, Yuki (1482) | Lost 1-2 | -171431 |
| 5extended | 159 | Imaizumi, Kenji (1505) | Lost 1-2 | -171414 |
| 6extended | 149 | Tanikawa, Itaru (1419) | Lost 1-2 | -171397 |
| 7extended | 132 | Kawamoto, Daisuke (1427) | Won 2-0 | +181415 |
| 8extended | 104 | Kayaki, Kazuya (1445) | Won 2-1 | +191434 |
| top | average opponent: 1457record: 3-5 | new rating: 1434 | ||
| Grand Prix Fukuoka 2002 (TOR limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 49 | Morimoto, Manabu (1504) | Lost 0-2 | -181482 |
| 3sealed | 83 | Nishikawa, Tomoyuki (1500) | Won 2-0 | +181500 |
| 4sealed | 67 | Yamasaki, Rintarou (1623) | Lost 1-2 | -151485 |
| 5sealed | 104 | Saitou, Kazuya (1433) | Won 2-1 | +171502 |
| 6sealed | 71 | Kim, Jang-hong (1503) | Lost 1-2 | -181484 |
| 7sealed | 103 | Ide, Kazushige (1497) | Lost 1-2 | -181466 |
| top | average opponent: 1510record: 2-4 | new rating: 1466 | ||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 424 | Mantani, Keiji (1500) | Lost 0-2 | -181482 |
| 2block | 569 | Kita, Meguto (1482) | Won 2-0 | +181500 |
| 3block | 265 | Wada, Atsushi (1500) | Lost 0-2 | -181482 |
| 4block | 493 | Noritake, Toshihiro (1482) | Won 2-0 | +181500 |
| 5block | 347 | Iwao, Takashi (1501) | Won 2-0 | +181518 |
| 6block | 332 | Yamada, Masamichi (1519) | Won 2-1 | +181536 |
| 7block | 134 | Yamashita, Yui (1535) | Lost 1-2 | -181518 |
| 8block | 251 | Oie, Ryuya (1515) | Lost 1-2 | -181500 |
| top | average opponent: 1504record: 4-4 | new rating: 1500 | ||