【Full Leaderboard】 Update 07/19 14:56
86th Japan Open Golf Championship 2021
| ROUND 4 | @：Amateur player |
| POS | Player | Score | Rounds | Total | |||
| R1 | R2 | R3 | R4 | ||||
| - | David Bransdon | +1 | 70 | 73 | - | - | - |
| - | Yasunobu Fukunaga | +1 | 68 | 75 | - | - | - |
| - | Yosuke Asaji | +1 | 70 | 73 | - | - | - |
| - | Hideto Kobukuro | +1 | 67 | 76 | - | - | - |
| - | Mikiya Akutsu | +1 | 70 | 73 | - | - | - |
| - | Atsushi Yuge | +1 | 71 | 72 | - | - | - |
| - | Tomohiro Umeyama | +2 | 71 | 73 | - | - | - |
| - | @ Kensei Hirata | +2 | 72 | 72 | - | - | - |
| - | Koichi Kitamura | +2 | 69 | 75 | - | - | - |
| - | Yuki Takeuchi | +2 | 75 | 69 | - | - | - |
| - | Yuta Uetake | +2 | 68 | 76 | - | - | - |
| - | Daisuke Harada | +2 | 72 | 72 | - | - | - |
| - | @ Taiga Sugihara | +2 | 72 | 72 | - | - | - |
| - | Eric Sugimoto | +2 | 72 | 72 | - | - | - |
| - | Hirotaro Naito | +2 | 71 | 73 | - | - | - |
| - | Hiroki Tanaka | +3 | 73 | 72 | - | - | - |
| - | Kunihiro Kamii | +3 | 74 | 71 | - | - | - |
| - | Shota Akiyoshi | +3 | 68 | 77 | - | - | - |
| - | Nobuaki Oda | +4 | 72 | 74 | - | - | - |
| - | Kei Takahashi | +4 | 75 | 71 | - | - | - |
| - | @ Riki Kawamoto | +4 | 70 | 76 | - | - | - |
| - | Shohei Karimata | +4 | 76 | 70 | - | - | - |
| - | @ Kosei Takeyama | +5 | 73 | 74 | - | - | - |
| - | Yuto Soeda | +5 | 74 | 73 | - | - | - |
| - | Terumichi Kakazu | +5 | 70 | 77 | - | - | - |
| - | Kazumasa Matsuda | +5 | 74 | 73 | - | - | - |
| - | Ryosuke Narimatsu | +5 | 74 | 73 | - | - | - |
| - | @ Jiei Kawai | +5 | 69 | 78 | - | - | - |
| - | Shingo Katayama | +5 | 73 | 74 | - | - | - |
| - | Tomoyasu Sugiyama | +6 | 72 | 76 | - | - | - |
| - | Ryo Noro | +6 | 73 | 75 | - | - | - |
| - | Shota Seki | +6 | 72 | 76 | - | - | - |
| - | Kazuya Koura | +6 | 74 | 74 | - | - | - |
| - | Masafumi Kawase | +7 | 71 | 78 | - | - | - |
| - | @ Naoki Uchida | +7 | 78 | 71 | - | - | - |
| - | Yuta Koketsu | +7 | 71 | 78 | - | - | - |
| - | Shunichiro Morioka | +7 | 79 | 70 | - | - | - |
| - | Shotaro Tanaka | +7 | 76 | 73 | - | - | - |
| - | Toshinori Muto | +8 | 71 | 79 | - | - | - |
| - | Yuki Kajimura | +8 | 75 | 75 | - | - | - |
| - | Yuichi Yamada | +8 | 76 | 74 | - | - | - |
| - | Koki Tomimoto | +9 | 77 | 74 | - | - | - |
| - | Kenichi Kuboya | +9 | 72 | 79 | - | - | - |
| - | Kazuki Ishige | +10 | 75 | 77 | - | - | - |
| - | Masanori Kobayashi | +10 | 76 | 76 | - | - | - |
| - | Tatsunori Shogenji | +10 | 75 | 77 | - | - | - |
| - | Kenji Itami | +13 | 75 | 80 | - | - | - |
| - | Shoji Kawai | +14 | 81 | 75 | - | - | - |