【Full Leaderboard】 Update 10/16 18:31
88th Japan Open Golf Championship 2023
| ROUND 1 | @：Amateur player |
| POS | Player | Score | Today | Hole | Rounds | Total | ||||
| R1 | R2 | R3 | R4 | |||||||
| 1 | Mikumu Horikawa | -4 | -4 | F | 66 | - | - | - | 66 | |
| @ Kohei Okada | -4 | -4 | F | 66 | - | - | - | 66 | ||
| 3 | Keita Nakajima | -3 | -3 | F | 67 | - | - | - | 67 | |
| Kota Kaneko | -3 | -3 | F | 67 | - | - | - | 67 | ||
| Akio Sadakata | -3 | -3 | F | 67 | - | - | - | 67 | ||
| 6 | Ryo Ishikawa | -2 | -2 | F | 68 | - | - | - | 68 | |
| Ryo Hisatsune | -2 | -2 | F | 68 | - | - | - | 68 | ||
| Yuki Inamori | -2 | -2 | F | 68 | - | - | - | 68 | ||
| Terumichi Kakazu | -2 | -2 | F | 68 | - | - | - | 68 | ||
| Noriyuki Kurogi | -2 | -2 | F | 68 | - | - | - | 68 | ||
| Aguri Iwasaki | -2 | -2 | F | 68 | - | - | - | 68 | ||
| Brad Kennedy | -2 | -2 | F | 68 | - | - | - | 68 | ||
| Yuta Uetake | -2 | -2 | F | 68 | - | - | - | 68 | ||
| 14 | Mikiya Akutsu | -1 | -1 | F | 69 | - | - | - | 69 | |
| Tomoyo Ikemura | -1 | -1 | F | 69 | - | - | - | 69 | ||
| Naoyuki Kataoka | -1 | -1 | F | 69 | - | - | - | 69 | ||
| Tatsunori Shogenji | -1 | -1 | F | 69 | - | - | - | 69 | ||
| Kensei Hirata | -1 | -1 | F | 69 | - | - | - | 69 | ||
| Sang-Hee Lee | -1 | -1 | F | 69 | - | - | - | 69 | ||
| Tomohiro Ishizaka | -1 | -1 | F | 69 | - | - | - | 69 | ||
| Shugo Imahira | -1 | -1 | F | 69 | - | - | - | 69 | ||
| Tomoharu Otsuki | -1 | -1 | F | 69 | - | - | - | 69 | ||
| @ Koichiro Furuse | -1 | -1 | F | 69 | - | - | - | 69 | ||
| 24 | Young-Han Song | ±0 | ±0 | F | 70 | - | - | - | 70 | |
| Daisuke Yasumoto | ±0 | ±0 | F | 70 | - | - | - | 70 | ||
| Masatsugu Morofuji | ±0 | ±0 | F | 70 | - | - | - | 70 | ||
| Sejung Hiramoto | ±0 | ±0 | F | 70 | - | - | - | 70 | ||
| Takahiro Hataji | ±0 | ±0 | F | 70 | - | - | - | 70 | ||
| Yuta Ikeda | ±0 | ±0 | F | 70 | - | - | - | 70 | ||
| @ Rintaro Nakano | ±0 | ±0 | F | 70 | - | - | - | 70 | ||
| 31 | Takashi Ogiso | +1 | +1 | F | 71 | - | - | - | 71 | |
| Taihei Sato | +1 | +1 | F | 71 | - | - | - | 71 | ||
| Ryosuke Kinoshita | +1 | +1 | F | 71 | - | - | - | 71 | ||
| Taichi Nabetani | +1 | +1 | F | 71 | - | - | - | 71 | ||
| Yusaku Hosono | +1 | +1 | F | 71 | - | - | - | 71 | ||
| Anthony Quayle | +1 | +1 | F | 71 | - | - | - | 71 | ||
| Taiga Semikawa | +1 | +1 | F | 71 | - | - | - | 71 | ||
| Yujiro Ohori | +1 | +1 | F | 71 | - | - | - | 71 | ||
| Juvic Pagunsan | +1 | +1 | F | 71 | - | - | - | 71 | ||
| Yuta Kinoshita | +1 | +1 | F | 71 | - | - | - | 71 | ||
| Masashi Shirouzu | +1 | +1 | F | 71 | - | - | - | 71 | ||
| Yusaku Miyazato | +1 | +1 | F | 71 | - | - | - | 71 | ||
| Masashi Hidaka | +1 | +1 | F | 71 | - | - | - | 71 | ||
| Taisei Shimizu | +1 | +1 | F | 71 | - | - | - | 71 | ||
| 45 | @ Yuma Iwai | +2 | +2 | F | 72 | - | - | - | 72 | |
| Yuto Katsuragawa | +2 | +2 | F | 72 | - | - | - | 72 | ||
| Ryutaro Nagano | +2 | +2 | F | 72 | - | - | - | 72 | ||
| Ryo Noro | +2 | +2 | F | 72 | - | - | - | 72 | ||
| Tomoyasu Sugiyama | +2 | +2 | F | 72 | - | - | - | 72 | ||
| Yuki Kajimura | +2 | +2 | F | 72 | - | - | - | 72 | ||
| Jigen Serizawa | +2 | +2 | F | 72 | - | - | - | 72 | ||
| Shiso Go | +2 | +2 | F | 72 | - | - | - | 72 | ||
| Justin De Los Santos | +2 | +2 | F | 72 | - | - | - | 72 | ||
| Shaun Norris | +2 | +2 | F | 72 | - | - | - | 72 | ||
| Jinichiro Kozuma | +2 | +2 | F | 72 | - | - | - | 72 | ||
| @ Yutaka Toyoshima | +2 | +2 | F | 72 | - | - | - | 72 | ||
| Hiroki Tanaka | +2 | +2 | F | 72 | - | - | - | 72 | ||
| 58 | Yuto Katsumata | +3 | +3 | F | 73 | - | - | - | 73 | |
| Kaito Onishi | +3 | +3 | F | 73 | - | - | - | 73 | ||
| Masamichi Ito | +3 | +3 | F | 73 | - | - | - | 73 | ||
| Kenya Nakayama | +3 | +3 | F | 73 | - | - | - | 73 | ||
| Adam Scott | +3 | +3 | F | 73 | - | - | - | 73 | ||
| Sean Maruyama | +3 | +3 | F | 73 | - | - | - | 73 | ||
| Riki Kawamoto | +3 | +3 | F | 73 | - | - | - | 73 | ||
| Hayato Yoshida | +3 | +3 | F | 73 | - | - | - | 73 | ||
| Taiga Nagano | +3 | +3 | F | 73 | - | - | - | 73 | ||
| Shingo Katayama | +3 | +3 | F | 73 | - | - | - | 73 | ||
| Yusuke Kaneko | +3 | +3 | F | 73 | - | - | - | 73 | ||
| Yosuke Tsukada | +3 | +3 | F | 73 | - | - | - | 73 | ||
| 70 | Nanase Wada | +4 | +4 | F | 74 | - | - | - | 74 | |
| Tomohiro Umeyama | +4 | +4 | F | 74 | - | - | - | 74 | ||
| Kenta Endo | +4 | +4 | F | 74 | - | - | - | 74 | ||
| Shunya Takeyasu | +4 | +4 | F | 74 | - | - | - | 74 | ||
| Prayad Marksaeng | +4 | +4 | F | 74 | - | - | - | 74 | ||
| Daijiro Izumida | +4 | +4 | F | 74 | - | - | - | 74 | ||
| Taiki Yoshida | +4 | +4 | F | 74 | - | - | - | 74 | ||
| @ Taishi Moto | +4 | +4 | F | 74 | - | - | - | 74 | ||
| Yuki Shino | +4 | +4 | F | 74 | - | - | - | 74 | ||
| Takeru Kawakami | +4 | +4 | F | 74 | - | - | - | 74 | ||
| Kosuke Suzuki | +4 | +4 | F | 74 | - | - | - | 74 | ||
| 81 | Hiroyuki Nagamatsu | +5 | +5 | F | 75 | - | - | - | 75 | |
| Ibuki Yoshida | +5 | +5 | F | 75 | - | - | - | 75 | ||
| Taichi Kimura | +5 | +5 | F | 75 | - | - | - | 75 | ||
| Hideto Tanihara | +5 | +5 | F | 75 | - | - | - | 75 | ||
| Takumi Kanaya | +5 | +5 | F | 75 | - | - | - | 75 | ||
| Ryusuke Sakurai | +5 | +5 | F | 75 | - | - | - | 75 | ||
| Makoto Inoue | +5 | +5 | F | 75 | - | - | - | 75 | ||
| Ryo Okamura | +5 | +5 | F | 75 | - | - | - | 75 | ||
| 89 | Hayato Sakuma | +6 | +6 | F | 76 | - | - | - | 76 | |
| Todd Baek | +6 | +6 | F | 76 | - | - | - | 76 | ||
| Taiga Iwata | +6 | +6 | F | 76 | - | - | - | 76 | ||
| @ Shoka Onishi | +6 | +6 | F | 76 | - | - | - | 76 | ||
| Shintaro Kobayashi | +6 | +6 | F | 76 | - | - | - | 76 | ||
| Toshihide Kato | +6 | +6 | F | 76 | - | - | - | 76 | ||
| Ryuichi Oiwa | +6 | +6 | F | 76 | - | - | - | 76 | ||
| Daisuke Matsubara | +6 | +6 | F | 76 | - | - | - | 76 | ||
| @ Jeffrey Guan | +6 | +6 | F | 76 | - | - | - | 76 | ||
| Takanori Konishi | +6 | +6 | F | 76 | - | - | - | 76 | ||
| 99 | Shota Yoshimoto | +7 | +7 | F | 77 | - | - | - | 77 | |
| Adam Bland | +7 | +7 | F | 77 | - | - | - | 77 | ||
| @ Kotaro Murata | +7 | +7 | F | 77 | - | - | - | 77 | ||
| Yasuki Hiramoto | +7 | +7 | F | 77 | - | - | - | 77 | ||
| Katsuyuki Sakurai | +7 | +7 | F | 77 | - | - | - | 77 | ||
| Masaru Takahashi | +7 | +7 | F | 77 | - | - | - | 77 | ||
| Koumei Oda | +7 | +7 | F | 77 | - | - | - | 77 | ||
| 106 | Ryuko Tokimatsu | +8 | +8 | F | 78 | - | - | - | 78 | |
| 107 | Shuto Sakamoto | +9 | +9 | F | 79 | - | - | - | 79 | |
| Eric Sugimoto | +9 | +9 | F | 79 | - | - | - | 79 | ||
| @ Riku Unose | +9 | +9 | F | 79 | - | - | - | 79 | ||
| Masatsugu Fujishima | +9 | +9 | F | 79 | - | - | - | 79 | ||
| Masanori Kobayashi | +9 | +9 | F | 79 | - | - | - | 79 | ||
| Shori Ishizuka | +9 | +9 | F | 79 | - | - | - | 79 | ||
| 113 | Yuta Komura | +10 | +10 | F | 80 | - | - | - | 80 | |
| Shintaro Ban | +10 | +10 | F | 80 | - | - | - | 80 | ||
| 115 | @ Yu Kurihara | +11 | +11 | F | 81 | - | - | - | 81 | |
| 116 | Motoki Tanaka | +12 | +12 | F | 82 | - | - | - | 82 | |
| 117 | @ Kaito Hashizume | +13 | +13 | F | 83 | - | - | - | 83 | |
| WD | Hiroshi Iwata | |||||||||
| WD | Taiko Nishiyama | |||||||||
| DQ | Michio Matsumura | |||||||||