【Full Leaderboard】 Update 09/20 15:42
30th Japan Senior Open Golf Championship 2020
| ROUND 1 | @:Amateur player |
| POS | Player | Score | Today | Hole | Rounds | Total | |||
| R1 | R2 | R3 | R4 | ||||||
| 1 | Akira Teranishi | -5 | -5 | F | 65 | - | - | - | 65 |
| 2 | Ryoken Kawagishi | -3 | -3 | F | 67 | - | - | - | 67 |
| 3 | Tsutomu Higa | -2 | -2 | F | 68 | - | - | - | 68 |
| Masanori Kojima | -2 | -2 | F | 68 | - | - | - | 68 | |
| Shinichi Akiba | -2 | -2 | F | 68 | - | - | - | 68 | |
| Norihiro Kumagai | -2 | -2 | F | 68 | - | - | - | 68 | |
| 7 | Hiroo Okamo | -1 | -1 | F | 69 | - | - | - | 69 |
| Taichi Teshima | -1 | -1 | F | 69 | - | - | - | 69 | |
| Taku Yamanaka | -1 | -1 | F | 69 | - | - | - | 69 | |
| 10 | Toshimitsu Izawa | ±0 | ±0 | F | 70 | - | - | - | 70 |
| Kohki Idoki | ±0 | ±0 | F | 70 | - | - | - | 70 | |
| Mamo Osanai | ±0 | ±0 | F | 70 | - | - | - | 70 | |
| Mitsuhiro Tateyama | ±0 | ±0 | F | 70 | - | - | - | 70 | |
| Hidezumi Shirakata | ±0 | ±0 | F | 70 | - | - | - | 70 | |
| Hiroyuki Fujita | ±0 | ±0 | F | 70 | - | - | - | 70 | |
| Yoshinori Mizumaki | ±0 | ±0 | F | 70 | - | - | - | 70 | |
| 17 | Tatsuo Takasaki | +1 | +1 | F | 71 | - | - | - | 71 |
| Yutaka Hagawa | +1 | +1 | F | 71 | - | - | - | 71 | |
| Takeshi Sakiyama | +1 | +1 | F | 71 | - | - | - | 71 | |
| Yoshinobu Tsukada | +1 | +1 | F | 71 | - | - | - | 71 | |
| Katsunari Takahashi | +1 | +1 | F | 71 | - | - | - | 71 | |
| Ikuo Shirahama | +1 | +1 | F | 71 | - | - | - | 71 | |
| Kazuhiro Takami | +1 | +1 | F | 71 | - | - | - | 71 | |
| Yuji Igarashi | +1 | +1 | F | 71 | - | - | - | 71 | |
| 25 | Masayoshi Yamazoe | +2 | +2 | F | 72 | - | - | - | 72 |
| Gregory Meyer | +2 | +2 | F | 72 | - | - | - | 72 | |
| Tetsuhiro Ogawa | +2 | +2 | F | 72 | - | - | - | 72 | |
| Tsuyoshi Yoneyama | +2 | +2 | F | 72 | - | - | - | 72 | |
| Kazuo Seike | +2 | +2 | F | 72 | - | - | - | 72 | |
| Katsunori Kuwabara | +2 | +2 | F | 72 | - | - | - | 72 | |
| Masahiro Kuramoto | +2 | +2 | F | 72 | - | - | - | 72 | |
| Hirokazu Hagiwara | +2 | +2 | F | 72 | - | - | - | 72 | |
| Masami Ito | +2 | +2 | F | 72 | - | - | - | 72 | |
| 34 | Tatsuaki Nakamura | +3 | +3 | F | 73 | - | - | - | 73 |
| Tomoyuki Nagai | +3 | +3 | F | 73 | - | - | - | 73 | |
| Keiichiro Fukabori | +3 | +3 | F | 73 | - | - | - | 73 | |
| Toru Suzuki | +3 | +3 | F | 73 | - | - | - | 73 | |
| Ken Hayano | +3 | +3 | F | 73 | - | - | - | 73 | |
| Yoichi Shimizu | +3 | +3 | F | 73 | - | - | - | 73 | |
| Mitsutaka Kusakabe | +3 | +3 | F | 73 | - | - | - | 73 | |
| Koji Kobayashi | +3 | +3 | F | 73 | - | - | - | 73 | |
| Toru Taniguchi | +3 | +3 | F | 73 | - | - | - | 73 | |
| Masayuki Kawamura | +3 | +3 | F | 73 | - | - | - | 73 | |
| Hitoshi Kato | +3 | +3 | F | 73 | - | - | - | 73 | |
| 45 | @ Mitsunori Kaneko | +4 | +4 | F | 74 | - | - | - | 74 |
| Norio Shinozaki | +4 | +4 | F | 74 | - | - | - | 74 | |
| Kyoji Hirota | +4 | +4 | F | 74 | - | - | - | 74 | |
| Tadaaki Hirasawa | +4 | +4 | F | 74 | - | - | - | 74 | |
| Hiroya Kamide | +4 | +4 | F | 74 | - | - | - | 74 | |
| Yasuaki Takashima | +4 | +4 | F | 74 | - | - | - | 74 | |
| Takenori Hiraishi | +4 | +4 | F | 74 | - | - | - | 74 | |
| @ Shigeru Tsuburaya | +4 | +4 | F | 74 | - | - | - | 74 | |
| Kiyoshi Murota | +4 | +4 | F | 74 | - | - | - | 74 | |
| Toshikazu Sugihara | +4 | +4 | F | 74 | - | - | - | 74 | |
| Takeharu Koike | +4 | +4 | F | 74 | - | - | - | 74 | |
| 56 | Katsumi Kubo | +5 | +5 | F | 75 | - | - | - | 75 |
| Hiroshi Tominaga | +5 | +5 | F | 75 | - | - | - | 75 | |
| Katsuyoshi Tomori | +5 | +5 | F | 75 | - | - | - | 75 | |
| Seiki Okuda | +5 | +5 | F | 75 | - | - | - | 75 | |
| Toru Morita | +5 | +5 | F | 75 | - | - | - | 75 | |
| Nobumasa Nakanishi | +5 | +5 | F | 75 | - | - | - | 75 | |
| Nobuo Serizawa | +5 | +5 | F | 75 | - | - | - | 75 | |
| Yoshikatsu Saito | +5 | +5 | F | 75 | - | - | - | 75 | |
| Keiichi Tsuji | +5 | +5 | F | 75 | - | - | - | 75 | |
| 65 | @ Minoru Sugiyama | +6 | +6 | F | 76 | - | - | - | 76 |
| Satoshi Higashi | +6 | +6 | F | 76 | - | - | - | 76 | |
| Yasuo Nakamura | +6 | +6 | F | 76 | - | - | - | 76 | |
| Hideki Kase | +6 | +6 | F | 76 | - | - | - | 76 | |
| Noriyuki Tsuji | +6 | +6 | F | 76 | - | - | - | 76 | |
| Naomichi Ozaki | +6 | +6 | F | 76 | - | - | - | 76 | |
| Matakichi Yamada | +6 | +6 | F | 76 | - | - | - | 76 | |
| Koichi Kashimura | +6 | +6 | F | 76 | - | - | - | 76 | |
| @ Akio Mizukami | +6 | +6 | F | 76 | - | - | - | 76 | |
| @ Masahiko Kida | +6 | +6 | F | 76 | - | - | - | 76 | |
| Hisashi Sawada | +6 | +6 | F | 76 | - | - | - | 76 | |
| Tomoyuki Hirano | +6 | +6 | F | 76 | - | - | - | 76 | |
| Yoshinori Kaneko | +6 | +6 | F | 76 | - | - | - | 76 | |
| Take Koyama | +6 | +6 | F | 76 | - | - | - | 76 | |
| Takao Komizo | +6 | +6 | F | 76 | - | - | - | 76 | |
| Yoshiyuki Ohashi | +6 | +6 | F | 76 | - | - | - | 76 | |
| 81 | Kiyoshi Maita | +7 | +7 | F | 77 | - | - | - | 77 |
| Hatsuo Nakane | +7 | +7 | F | 77 | - | - | - | 77 | |
| Takaaki Fukuzawa | +7 | +7 | F | 77 | - | - | - | 77 | |
| Yoshitaka Yamada | +7 | +7 | F | 77 | - | - | - | 77 | |
| Kazuhiro Fukunaga | +7 | +7 | F | 77 | - | - | - | 77 | |
| Yasuo Oshima | +7 | +7 | F | 77 | - | - | - | 77 | |
| Tsukasa Watanabe | +7 | +7 | F | 77 | - | - | - | 77 | |
| 88 | Hajime Tanaka | +8 | +8 | F | 78 | - | - | - | 78 |
| Minoru Miyashita | +8 | +8 | F | 78 | - | - | - | 78 | |
| Masayoshi Nakayama | +8 | +8 | F | 78 | - | - | - | 78 | |
| @ Yasushi Yonehara | +8 | +8 | F | 78 | - | - | - | 78 | |
| Toshikatsu Asazawa | +8 | +8 | F | 78 | - | - | - | 78 | |
| Naoyuki Tamura | +8 | +8 | F | 78 | - | - | - | 78 | |
| Yuzo Oyama | +8 | +8 | F | 78 | - | - | - | 78 | |
| Satoshi Kawamura | +8 | +8 | F | 78 | - | - | - | 78 | |
| Shinsuke Yanagisawa | +8 | +8 | F | 78 | - | - | - | 78 | |
| 97 | Nobuhito Sato | +9 | +9 | F | 79 | - | - | - | 79 |
| Takeshi Nakashima | +9 | +9 | F | 79 | - | - | - | 79 | |
| Toshio Ozaki | +9 | +9 | F | 79 | - | - | - | 79 | |
| Eiji Mizoguchi | +9 | +9 | F | 79 | - | - | - | 79 | |
| @ Yosuke Tanaka | +9 | +9 | F | 79 | - | - | - | 79 | |
| Mitsutoshi Koike | +9 | +9 | F | 79 | - | - | - | 79 | |
| Tateo Ozaki | +9 | +9 | F | 79 | - | - | - | 79 | |
| Tomonori Takamura | +9 | +9 | F | 79 | - | - | - | 79 | |
| Norihito Fujii | +9 | +9 | F | 79 | - | - | - | 79 | |
| 106 | Toshikazu Fukuda | +10 | +10 | F | 80 | - | - | - | 80 |
| Mitsuo Harada | +10 | +10 | F | 80 | - | - | - | 80 | |
| Keisuke Imanishi | +10 | +10 | F | 80 | - | - | - | 80 | |
| Seiji Ebihara | +10 | +10 | F | 80 | - | - | - | 80 | |
| @ Haruhisa Kanaoka | +10 | +10 | F | 80 | - | - | - | 80 | |
| Masaki Hasegawa | +10 | +10 | F | 80 | - | - | - | 80 | |
| Akio Nishizawa | +10 | +10 | F | 80 | - | - | - | 80 | |
| Junji Hashizoe | +10 | +10 | F | 80 | - | - | - | 80 | |
| 114 | Yasuyoshi Tada | +11 | +11 | F | 81 | - | - | - | 81 |
| @ Hideki Tachi | +11 | +11 | F | 81 | - | - | - | 81 | |
| 116 | Takeshi Oyama | +12 | +12 | F | 82 | - | - | - | 82 |
| @ Toshiharu Kimura | +12 | +12 | F | 82 | - | - | - | 82 | |
| 118 | @ Hiroshi Oku | +13 | +13 | F | 83 | - | - | - | 83 |
| Kazushige Oya | +13 | +13 | F | 83 | - | - | - | 83 | |
| Nobuyuki Asano | +13 | +13 | F | 83 | - | - | - | 83 | |
| Daisuke Serizawa | +13 | +13 | F | 83 | - | - | - | 83 | |
| Mamoru Nakata | +13 | +13 | F | 83 | - | - | - | 83 | |
| @ Shiro Mori | +13 | +13 | F | 83 | - | - | - | 83 | |
| 124 | @ Nobuhiro Sawada | +14 | +14 | F | 84 | - | - | - | 84 |
| Noboru Matsuo | +14 | +14 | F | 84 | - | - | - | 84 | |
| 126 | @ Mitsuhiro Takemura | +18 | +18 | F | 88 | - | - | - | 88 |