【Full Leaderboard】 Update 05/20 15:03
74th Japan Open Golf Championship 2009
| ROUND 4 | @：Amateur player |
| POS | Player | Score | Rounds | Total | |||
| R1 | R2 | R3 | R4 | ||||
| - | Jong-Duck Kim | +6 | 77 | 73 | - | - | - |
| - | @ Yuki Usami | +6 | 75 | 75 | - | - | - |
| - | Masayuki Kawamura | +6 | 74 | 76 | - | - | - |
| - | @ Genzo Tokimatsu | +6 | 76 | 74 | - | - | - |
| - | Tatsuhiko Takahashi | +6 | 75 | 75 | - | - | - |
| - | Yoshinobu Tsukada | +6 | 75 | 75 | - | - | - |
| - | I J Jang | +6 | 74 | 76 | - | - | - |
| - | Paul Sheehan | +6 | 72 | 78 | - | - | - |
| - | Michio Matsumura | +6 | 69 | 81 | - | - | - |
| - | Kentaro Yonekura | +7 | 74 | 77 | - | - | - |
| - | Toru Suzuki | +7 | 75 | 76 | - | - | - |
| - | Hirotaro Naito | +7 | 75 | 76 | - | - | - |
| - | @ Shinji Tomimura | +8 | 74 | 78 | - | - | - |
| - | Jumpei Takayama | +8 | 73 | 79 | - | - | - |
| - | Tatsuaki Nakamura | +8 | 77 | 75 | - | - | - |
| - | Tadahiro Yabe | +8 | 77 | 75 | - | - | - |
| - | Tsuneyuki Nakajima | +8 | 75 | 77 | - | - | - |
| - | Taichiro Kiyota | +8 | 75 | 77 | - | - | - |
| - | Toshiya Sakakura | +8 | 74 | 78 | - | - | - |
| - | Hisaki Takeuchi | +8 | 79 | 73 | - | - | - |
| - | @ Masaya Takahashi | +8 | 80 | 72 | - | - | - |
| - | Mamoru Osanai | +8 | 77 | 75 | - | - | - |
| - | @ Keisuke Otawa | +9 | 80 | 73 | - | - | - |
| - | Hiroaki Nishioka | +9 | 80 | 73 | - | - | - |
| - | @ Masahiko Sanada | +9 | 76 | 77 | - | - | - |
| - | Masakazu Yamauchi | +9 | 76 | 77 | - | - | - |
| - | Kiyoshi Maita | +9 | 76 | 77 | - | - | - |
| - | Takahiro Mishina | +10 | 76 | 78 | - | - | - |
| - | @ Misaki Mori | +10 | 78 | 76 | - | - | - |
| - | Norihiko Nakata | +10 | 79 | 75 | - | - | - |
| - | Koki Idoki | +10 | 76 | 78 | - | - | - |
| - | Ryoma Iwai | +10 | 78 | 76 | - | - | - |
| - | @ Taiichiro Watanabe | +10 | 76 | 78 | - | - | - |
| - | @ Masamichi Ito | +11 | 78 | 77 | - | - | - |
| - | Katsumune Imai | +11 | 80 | 75 | - | - | - |
| - | Toru Taniguchi | +11 | 78 | 77 | - | - | - |
| - | Tatsunori Nukaga | +11 | 79 | 76 | - | - | - |
| - | Kazunori Suzuki | +12 | 79 | 77 | - | - | - |
| - | @ Kota Gondo | +12 | 76 | 80 | - | - | - |
| - | Tatsuya Sato | +12 | 79 | 77 | - | - | - |
| - | @ Naoyuki Tamura | +12 | 78 | 78 | - | - | - |
| - | Hisashi Sawada | +13 | 74 | 83 | - | - | - |
| - | Masayuki Fukahori | +14 | 78 | 80 | - | - | - |
| - | Kunichika Iha | +14 | 78 | 80 | - | - | - |
| - | Shunta Maeawakura | +14 | 79 | 79 | - | - | - |
| - | Mitsunobu Fukunaga | +14 | 81 | 77 | - | - | - |
| - | Taro Hiroi | +14 | 80 | 78 | - | - | - |
| - | @ Shunsuke Sonoda | +14 | 79 | 79 | - | - | - |
| - | Koji Yamamoto | +15 | 78 | 81 | - | - | - |
| - | @ Takaya Onoda | +15 | 76 | 83 | - | - | - |
| - | Yukio Noguchi | +15 | 83 | 76 | - | - | - |
| - | Ryosuke Okano | +16 | 80 | 80 | - | - | - |
| - | Toru Niidome | +16 | 78 | 82 | - | - | - |
| - | Motoki Hieda | +17 | 80 | 81 | - | - | - |
| - | @ Kentaro Shibata | +17 | 80 | 81 | - | - | - |
| - | Minoru Hayashi | +18 | 77 | 85 | - | - | - |
| - | Kiyoshi Sunairi | +18 | 85 | 77 | - | - | - |
| - | @ Yutaro Kuga | +19 | 82 | 81 | - | - | - |
| - | @ Makoto Iwasaki | +22 | 84 | 82 | - | - | - |