【Full Leaderboard】 Update 09/17 19:49
33rd Japan Senior Open Golf Championship 2023
| ROUND 4 | @：Amateur player |
| POS | Player | Score | Rounds | Total | |||
| R1 | R2 | R3 | R4 | ||||
| - | Kazushi Kitazawa | +4 | 76 | 72 | - | - | - |
| - | Toshimitsu Izawa | +4 | 75 | 73 | - | - | - |
| - | @ Tomoki Ota | +4 | 72 | 76 | - | - | - |
| - | Tatsuru Watanabe | +4 | 72 | 76 | - | - | - |
| - | Keiichiro Fukabori | +4 | 73 | 75 | - | - | - |
| - | Masayoshi Nakayama | +4 | 71 | 77 | - | - | - |
| - | @ Yasushi Murata | +4 | 74 | 74 | - | - | - |
| - | Kazuo Nakata | +4 | 75 | 73 | - | - | - |
| - | Masahiro Kuramoto | +5 | 75 | 74 | - | - | - |
| - | Hisao Ahara | +5 | 73 | 76 | - | - | - |
| - | Jong-Duck Kim | +5 | 75 | 74 | - | - | - |
| - | Kazuo Seike | +5 | 76 | 73 | - | - | - |
| - | Kiyoshi Maita | +5 | 76 | 73 | - | - | - |
| - | Mitsuhiro Tateyama | +5 | 73 | 76 | - | - | - |
| - | Hideki Haraguchi | +5 | 74 | 75 | - | - | - |
| - | Shinichi Akiba | +5 | 73 | 76 | - | - | - |
| - | Toshiki Yamamoto | +6 | 76 | 74 | - | - | - |
| - | Terutaka Kirikihira | +6 | 73 | 77 | - | - | - |
| - | Fumiki Asada | +6 | 78 | 72 | - | - | - |
| - | Tsukasa Watanabe | +6 | 77 | 73 | - | - | - |
| - | Yutaka Hagawa | +6 | 77 | 73 | - | - | - |
| - | Takao Nogami | +6 | 75 | 75 | - | - | - |
| - | Kiyoshi Murota | +6 | 78 | 72 | - | - | - |
| - | Kunio Jo | +6 | 75 | 75 | - | - | - |
| - | Naoya Sugiyama | +7 | 74 | 77 | - | - | - |
| - | Hideki Kase | +7 | 77 | 74 | - | - | - |
| - | Koichi Kokubo | +7 | 75 | 76 | - | - | - |
| - | Katsuya Tanaka | +7 | 78 | 73 | - | - | - |
| - | Daisuke Maruyama | +7 | 74 | 77 | - | - | - |
| - | Takenori Hiraishi | +7 | 74 | 77 | - | - | - |
| - | Gregory Meyer | +7 | 74 | 77 | - | - | - |
| - | Hisashi Sawada | +7 | 75 | 76 | - | - | - |
| - | Tetsu Nishikawa | +8 | 73 | 79 | - | - | - |
| - | @ Akio Mizukami | +9 | 80 | 73 | - | - | - |
| - | Katsunari Takahashi | +9 | 79 | 74 | - | - | - |
| - | Shigemasa Higaki | +9 | 74 | 79 | - | - | - |
| - | Go Honda | +9 | 77 | 76 | - | - | - |
| - | Atsushi Takamatsu | +9 | 79 | 74 | - | - | - |
| - | Go Sato | +10 | 75 | 79 | - | - | - |
| - | Seiki Okuda | +10 | 77 | 77 | - | - | - |
| - | Fumihito Miyashita | +10 | 77 | 77 | - | - | - |
| - | Takaki Ono | +10 | 78 | 76 | - | - | - |
| - | Toru Morita | +10 | 74 | 80 | - | - | - |
| - | Suguru Inoue | +11 | 75 | 80 | - | - | - |
| - | Yuzo Oyama | +11 | 78 | 77 | - | - | - |
| - | Keijiro Kimura | +11 | 78 | 77 | - | - | - |
| - | Masahiko Arai | +11 | 78 | 77 | - | - | - |
| - | Munemasa Obinata | +11 | 75 | 80 | - | - | - |
| - | Yoshinori Kobayashi | +11 | 77 | 78 | - | - | - |
| - | Masayuki Kawamura | +12 | 79 | 77 | - | - | - |
| - | Makoto Onodera | +12 | 79 | 77 | - | - | - |
| - | @ Yoshifumi Kochi | +12 | 75 | 81 | - | - | - |
| - | Hiroyuki Mandai | +12 | 78 | 78 | - | - | - |
| - | @ Nobuteru Shimono | +13 | 80 | 77 | - | - | - |
| - | @ Takaaki Inoue | +13 | 80 | 77 | - | - | - |
| - | Yasuo Oshima | +14 | 80 | 78 | - | - | - |
| - | Tomoyuki Hirano | +15 | 79 | 80 | - | - | - |
| - | Taizan Fujii | +15 | 80 | 79 | - | - | - |
| - | @ Takahiro Takeuchi | +16 | 79 | 81 | - | - | - |
| - | Tatsuya Kaneko | +16 | 78 | 82 | - | - | - |
| - | Masatsugu Oku | +16 | 84 | 76 | - | - | - |
| - | Tsuyoshi Higa | +18 | 82 | 80 | - | - | - |
| - | @ Shigeyuki Morioka | +20 | 82 | 82 | - | - | - |
| - | Hideaki Yamashita | +21 | 79 | 86 | - | - | - |
| - | Yuji Asanuma | +24 | 84 | 84 | - | - | - |
| - | @ Yoichi Fukutome | +24 | 80 | 88 | - | - | - |