Houwa, Osamu
Current rating: 1570
Record: 24-20 (GP) / 5-8 (professional)
| Pro Tour Kyoto 2009 (CON standard) | starting rating: 1602 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 42 | Lawson, Eric (1436) | Won 2-1 | +151617 |
| 2standard | 86 | Gillette, Clayton (1669) | Won 2-1 | +191636 |
| 3standard | 5 | Erickson, Jens (1571) | Lost 0-2 | -191617 |
| 4standard | 79 | Lee, Shi Tian (1798) | Lost 0-2 | -151602 |
| 5draft | 122 | Nicastri, Aaron (1830) | Lost 0-2 | -141588 |
| 6draft | 79 | Mihara, Makihito (1953) | Won 2-0 | +251613 |
| 7draft | 73 | Gregoir, Christophe (1730) | Won 2-1 | +201633 |
| 8draft | 66 | Huang, Hao-Shan (1597) | Lost 0-2 | -191614 |
| 10draft | 21 | Kong, Chong Teng (1665) | Won 2-0 | +191633 |
| 11standard | 58 | Coale, Hunter (1790) | Lost 1-2 | -151618 |
| 12standard | 60 | Bailly-Maitre, Gael (1585) | Lost 0-2 | -191599 |
| 13standard | 73 | Takahashi, Yuta (1872) | Lost 0-2 | -131586 |
| 14standard | 76 | Heigerer, Stefan (1698) | Lost 0-2 | -161570 |
| top | average opponent: 1707record: 5-8 | new rating: 1570 | ||
| Grand Prix Okayama 2008 (ALA limited) | starting rating: 1610 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 38 | koyama, masashi[TK] (1517) | Won 2-0 | +171627 |
| 3sealed | 67 | Iwasawa, Fumiya (1534) | Won 2-1 | +161643 |
| 4sealed | 8 | Abe, Genta (1590) | Lost 1-2 | -191624 |
| 5sealed | 42 | Tsukagoshi, Tadaki (1410) | Lost 1-2 | -221602 |
| top | average opponent: 1513record: 2-2 | new rating: 1602 | ||
| Grand Prix Nagoya 2004 (5DN standard) | starting rating: 1601 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 33 | Taniguchi, Hidehisa (1536) | Lost 1-2 | -191582 |
| 4standard | 289 | Tanaka, Yoshiya (1521) | Won 2-0 | +171599 |
| 5standard | 149 | Yamanishi, Mamoru (1603) | Lost 0-2 | -181581 |
| 6standard | 223 | Sakamoto, Sakito (1483) | Won 2-1 | +161597 |
| 7standard | 128 | Samiso, Yutaka (1450) | Won 2-1 | +161613 |
| 8standard | 99 | Iwata, Futoshi (1539) | Lost 0-2 | -201593 |
| 9standard | 121 | Kamifuji, Kenichi (1541) | Won 2-0 | +171610 |
| top | average opponent: 1525record: 4-3 | new rating: 1610 | ||
| Grand Prix Yokohama 2003 (Onslaught block) | starting rating: 1461 | |||
| round | table | opponent (rating) | result | Δrating |
| 3block | 39 | Minami, Masashi (1641) | Won 2-1 | +221483 |
| 4block | 10 | Azuma, Motokiyo (1788) | Won 2-0 | +231506 |
| 5block | 29 | Yamamoto, Kouhei (1576) | Lost 0-2 | -171489 |
| 6block | 69 | Ohara, Yoshirou (1557) | Lost 0-2 | -161473 |
| 7block | 86 | Kouno, Tomohiro (1562) | Lost 0-2 | -171456 |
| 8block | 131 | Kitazawa, Kiyohiro (1518) | Won 2-0 | +191475 |
| 9block | 111 | Tezuka, Yuuki (1400) | Won 2-1 | +171492 |
| 10block | 84 | Yamada, Tsutomu (1732) | Won 2-1 | +221514 |
| 11block | 55 | Usami, Taro (1637) | Won 2-0 | +201534 |
| 12block | 27 | Bandou, Junichirou (1625) | Won 2-1 | +201554 |
| 13block | 23 | Okazaki, Yuuki (1608) | Won 2-1 | +191573 |
| 14block | 12 | Fujita, Tsuyoshi (2004) | Won 2-0 | +251598 |
| 15block | 8 | Ozawa, Takeshi (1591) | Lost 0-2 | -181580 |
| 16block | 21 | Nagaoka, Takayuki (1742) | Won 2-1 | +211601 |
| top | average opponent: 1641record: 10-4 | new rating: 1601 | ||
| Grand Prix Shizuoka 2001 (ODY limited) | starting rating: 1479 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 14 | Futamata, Shunji (1500) | Lost 0-2 | -171462 |
| 2sealed | 261 | Kawano, Mikio (1427) | Won 2-0 | +171479 |
| 3sealed | 200 | Katsuki, Yuichiro (1500) | Lost 0-2 | -181461 |
| top | average opponent: 1476record: 1-2 | new rating: 1461 | ||
| Grand Prix Kobe 2001 (Invasion block) | starting rating: 1476 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 167 | Nagase, Kazuki (1481) | Lost 1-2 | -181458 |
| 3block | 455 | Takeshita, Toru (1500) | Lost 0-2 | -171441 |
| 4block | 504 | Mizuta, Kazuo (1481) | Won 2-0 | +181459 |
| 5block | 296 | Mitsumori, Masahiko (1500) | Won 2-1 | +191478 |
| 6block | 285 | Shimoda, Masaki (1518) | Won 2-0 | +191497 |
| 7block | 166 | Kitamura, Katsuaki (1519) | Lost 0-2 | -181479 |
| top | average opponent: 1500record: 3-3 | new rating: 1479 | ||
| Grand Prix Hiroshima 2001 (INV limited) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 138 | Fukuda, Yukio (1500) | Won 2-0 | +191466 |
| 2sealed | 10 | Sasaki, Ken (1518) | Won 2-0 | +191485 |
| 3sealed | 50 | Iwaki, Hisatomo (1536) | Won 2-0 | +191504 |
| 4sealed | 7 | Fujita, Kenichi (1622) | Lost 1-2 | -161488 |
| 5sealed | 76 | Murakami, Yuki (1691) | Lost 1-2 | -151473 |
| 6sealed | 101 | Mori, Kazushi (1519) | Won 2-0 | +191492 |
| 7sealed | 49 | Kise, Masato (1583) | Lost 1-2 | -161476 |
| top | average opponent: 1567record: 4-3 | new rating: 1476 | ||
| Grand Prix Kyoto 2000 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 20 | Sakaguchi, Masanobu (1500) | Lost 0-1 | -181482 |
| 3extended | 163 | Nogami, Kazuki (1500) | Lost 0-2 | -181464 |
| 4extended | 271 | Miyamoto, Satoshi (1482) | Lost 0-2 | -171447 |
| top | average opponent: 1494record: 0-3 | new rating: 1447 | ||