【Full Leaderboard】 Update 09/17 19:48
33rd Japan Senior Open Golf Championship 2023
| ROUND 1 | @：Amateur player |
| POS | Player | Score | Today | Hole | Rounds | Total | |||
| R1 | R2 | R3 | R4 | ||||||
| 1 | Katsumasa Miyamoto | -6 | -6 | F | 66 | - | - | - | 66 |
| 2 | Nobuhiro Masuda | -4 | -4 | F | 68 | - | - | - | 68 |
| Mitsuhiro Watanabe | -4 | -4 | F | 68 | - | - | - | 68 | |
| 4 | Hidezumi Shirakata | -3 | -3 | F | 69 | - | - | - | 69 |
| Jeev Milkha Singh | -3 | -3 | F | 69 | - | - | - | 69 | |
| Prayad Marksaeng | -3 | -3 | F | 69 | - | - | - | 69 | |
| Shingo Katayama | -3 | -3 | F | 69 | - | - | - | 69 | |
| Akira Teranishi | -3 | -3 | F | 69 | - | - | - | 69 | |
| Masayoshi Yamazoe | -3 | -3 | F | 69 | - | - | - | 69 | |
| 10 | Toshihiro Aizawa | -2 | -2 | F | 70 | - | - | - | 70 |
| Hiroyuki Fujita | -2 | -2 | F | 70 | - | - | - | 70 | |
| Hiroo Okamo | -2 | -2 | F | 70 | - | - | - | 70 | |
| Kazumasa Sakaitani | -2 | -2 | F | 70 | - | - | - | 70 | |
| Mitsugu Kawai | -2 | -2 | F | 70 | - | - | - | 70 | |
| Katsuyoshi Murakami | -2 | -2 | F | 70 | - | - | - | 70 | |
| Suk Joug Yul | -2 | -2 | F | 70 | - | - | - | 70 | |
| Naoki Yazawa | -2 | -2 | F | 70 | - | - | - | 70 | |
| Tadanori Shibata | -2 | -2 | F | 70 | - | - | - | 70 | |
| Shoichi Kita | -2 | -2 | F | 70 | - | - | - | 70 | |
| Takeshi Sakiyama | -2 | -2 | F | 70 | - | - | - | 70 | |
| Shinichi Yokota | -2 | -2 | F | 70 | - | - | - | 70 | |
| Katsumi Kubo | -2 | -2 | F | 70 | - | - | - | 70 | |
| 23 | Jiro Minamizaki | -1 | -1 | F | 71 | - | - | - | 71 |
| @ Hiroyasu Yokoyama | -1 | -1 | F | 71 | - | - | - | 71 | |
| Masayoshi Nakayama | -1 | -1 | F | 71 | - | - | - | 71 | |
| Thaworn Wiratchant | -1 | -1 | F | 71 | - | - | - | 71 | |
| Satoshi Higashi | -1 | -1 | F | 71 | - | - | - | 71 | |
| S K HO | -1 | -1 | F | 71 | - | - | - | 71 | |
| Toru Taniguchi | -1 | -1 | F | 71 | - | - | - | 71 | |
| Yoichi Shimizu | -1 | -1 | F | 71 | - | - | - | 71 | |
| Yukio Fukazawa | -1 | -1 | F | 71 | - | - | - | 71 | |
| Hiroaki Iijima | -1 | -1 | F | 71 | - | - | - | 71 | |
| Kazunori Suzuki | -1 | -1 | F | 71 | - | - | - | 71 | |
| Sungpil Park | -1 | -1 | F | 71 | - | - | - | 71 | |
| Kazuhiro Kida | -1 | -1 | F | 71 | - | - | - | 71 | |
| 36 | Naoki Shimoyama | ±0 | ±0 | F | 72 | - | - | - | 72 |
| Hitoshi Kato | ±0 | ±0 | F | 72 | - | - | - | 72 | |
| Shigeru Nonaka | ±0 | ±0 | F | 72 | - | - | - | 72 | |
| I J Jang | ±0 | ±0 | F | 72 | - | - | - | 72 | |
| Tatsuya Tanioka | ±0 | ±0 | F | 72 | - | - | - | 72 | |
| Kazuhiko Hosokawa | ±0 | ±0 | F | 72 | - | - | - | 72 | |
| Norio Shinozaki | ±0 | ±0 | F | 72 | - | - | - | 72 | |
| @ Tomoki Ota | ±0 | ±0 | F | 72 | - | - | - | 72 | |
| Tatsuru Watanabe | ±0 | ±0 | F | 72 | - | - | - | 72 | |
| 45 | Yoshinobu Tsukada | +1 | +1 | F | 73 | - | - | - | 73 |
| Taichi Teshima | +1 | +1 | F | 73 | - | - | - | 73 | |
| David Smail | +1 | +1 | F | 73 | - | - | - | 73 | |
| Koji Iwasaki | +1 | +1 | F | 73 | - | - | - | 73 | |
| Tetsu Nishikawa | +1 | +1 | F | 73 | - | - | - | 73 | |
| Mitsuhiro Tateyama | +1 | +1 | F | 73 | - | - | - | 73 | |
| Kaname Yokoo | +1 | +1 | F | 73 | - | - | - | 73 | |
| Shinichi Akiba | +1 | +1 | F | 73 | - | - | - | 73 | |
| Naoyuki Tamura | +1 | +1 | F | 73 | - | - | - | 73 | |
| Terutaka Kirikihira | +1 | +1 | F | 73 | - | - | - | 73 | |
| Arihito Umeda | +1 | +1 | F | 73 | - | - | - | 73 | |
| Hisao Ahara | +1 | +1 | F | 73 | - | - | - | 73 | |
| @ Ichiro Tanimoto | +1 | +1 | F | 73 | - | - | - | 73 | |
| Keiichiro Fukabori | +1 | +1 | F | 73 | - | - | - | 73 | |
| Takashi Kanemoto | +1 | +1 | F | 73 | - | - | - | 73 | |
| Achi Sato | +1 | +1 | F | 73 | - | - | - | 73 | |
| Hideki Usami | +1 | +1 | F | 73 | - | - | - | 73 | |
| 62 | Shigemasa Higaki | +2 | +2 | F | 74 | - | - | - | 74 |
| Daisuke Maruyama | +2 | +2 | F | 74 | - | - | - | 74 | |
| Takenori Hiraishi | +2 | +2 | F | 74 | - | - | - | 74 | |
| @ Yasushi Murata | +2 | +2 | F | 74 | - | - | - | 74 | |
| Toru Morita | +2 | +2 | F | 74 | - | - | - | 74 | |
| Hideki Haraguchi | +2 | +2 | F | 74 | - | - | - | 74 | |
| Nobuyuki Shirai | +2 | +2 | F | 74 | - | - | - | 74 | |
| Gregory Meyer | +2 | +2 | F | 74 | - | - | - | 74 | |
| Hirofumi Miyase | +2 | +2 | F | 74 | - | - | - | 74 | |
| Tetsuji Hiratsuka | +2 | +2 | F | 74 | - | - | - | 74 | |
| Naoya Sugiyama | +2 | +2 | F | 74 | - | - | - | 74 | |
| Kenichi Kuboya | +2 | +2 | F | 74 | - | - | - | 74 | |
| Frankie Minoza | +2 | +2 | F | 74 | - | - | - | 74 | |
| Katsunori Kuwabara | +2 | +2 | F | 74 | - | - | - | 74 | |
| 76 | Jong-Duck Kim | +3 | +3 | F | 75 | - | - | - | 75 |
| Kunio Jo | +3 | +3 | F | 75 | - | - | - | 75 | |
| Munemasa Obinata | +3 | +3 | F | 75 | - | - | - | 75 | |
| Kazuo Nakata | +3 | +3 | F | 75 | - | - | - | 75 | |
| Hisashi Sawada | +3 | +3 | F | 75 | - | - | - | 75 | |
| Masahiro Kuramoto | +3 | +3 | F | 75 | - | - | - | 75 | |
| Toshimitsu Izawa | +3 | +3 | F | 75 | - | - | - | 75 | |
| Suguru Inoue | +3 | +3 | F | 75 | - | - | - | 75 | |
| Go Sato | +3 | +3 | F | 75 | - | - | - | 75 | |
| Koichi Kokubo | +3 | +3 | F | 75 | - | - | - | 75 | |
| @ Yoshifumi Kochi | +3 | +3 | F | 75 | - | - | - | 75 | |
| @ Masaya Takahashi | +3 | +3 | F | 75 | - | - | - | 75 | |
| Takao Nogami | +3 | +3 | F | 75 | - | - | - | 75 | |
| 89 | Kazuo Seike | +4 | +4 | F | 76 | - | - | - | 76 |
| Kiyoshi Maita | +4 | +4 | F | 76 | - | - | - | 76 | |
| Kazushi Kitazawa | +4 | +4 | F | 76 | - | - | - | 76 | |
| Toshiki Yamamoto | +4 | +4 | F | 76 | - | - | - | 76 | |
| Toru Suzuki | +4 | +4 | F | 76 | - | - | - | 76 | |
| 94 | Fumihito Miyashita | +5 | +5 | F | 77 | - | - | - | 77 |
| Go Honda | +5 | +5 | F | 77 | - | - | - | 77 | |
| Yoshinori Kobayashi | +5 | +5 | F | 77 | - | - | - | 77 | |
| Yutaka Hagawa | +5 | +5 | F | 77 | - | - | - | 77 | |
| Tsukasa Watanabe | +5 | +5 | F | 77 | - | - | - | 77 | |
| Hideki Kase | +5 | +5 | F | 77 | - | - | - | 77 | |
| Seiki Okuda | +5 | +5 | F | 77 | - | - | - | 77 | |
| 101 | Masahiko Arai | +6 | +6 | F | 78 | - | - | - | 78 |
| Kiyoshi Murota | +6 | +6 | F | 78 | - | - | - | 78 | |
| Takaki Ono | +6 | +6 | F | 78 | - | - | - | 78 | |
| Hiroyuki Mandai | +6 | +6 | F | 78 | - | - | - | 78 | |
| Tatsuya Kaneko | +6 | +6 | F | 78 | - | - | - | 78 | |
| Fumiki Asada | +6 | +6 | F | 78 | - | - | - | 78 | |
| Yuzo Oyama | +6 | +6 | F | 78 | - | - | - | 78 | |
| Keijiro Kimura | +6 | +6 | F | 78 | - | - | - | 78 | |
| Katsuya Tanaka | +6 | +6 | F | 78 | - | - | - | 78 | |
| 110 | Hideaki Yamashita | +7 | +7 | F | 79 | - | - | - | 79 |
| Atsushi Takamatsu | +7 | +7 | F | 79 | - | - | - | 79 | |
| Masayuki Kawamura | +7 | +7 | F | 79 | - | - | - | 79 | |
| @ Takahiro Takeuchi | +7 | +7 | F | 79 | - | - | - | 79 | |
| Makoto Onodera | +7 | +7 | F | 79 | - | - | - | 79 | |
| Katsunari Takahashi | +7 | +7 | F | 79 | - | - | - | 79 | |
| Tomoyuki Hirano | +7 | +7 | F | 79 | - | - | - | 79 | |
| 117 | Taizan Fujii | +8 | +8 | F | 80 | - | - | - | 80 |
| @ Nobuteru Shimono | +8 | +8 | F | 80 | - | - | - | 80 | |
| @ Takaaki Inoue | +8 | +8 | F | 80 | - | - | - | 80 | |
| @ Yoichi Fukutome | +8 | +8 | F | 80 | - | - | - | 80 | |
| @ Akio Mizukami | +8 | +8 | F | 80 | - | - | - | 80 | |
| Yasuo Oshima | +8 | +8 | F | 80 | - | - | - | 80 | |
| 123 | @ Shigeyuki Morioka | +10 | +10 | F | 82 | - | - | - | 82 |
| Tsuyoshi Higa | +10 | +10 | F | 82 | - | - | - | 82 | |
| 125 | Masatsugu Oku | +12 | +12 | F | 84 | - | - | - | 84 |
| Yuji Asanuma | +12 | +12 | F | 84 | - | - | - | 84 | |