【Full Leaderboard】 Update 08/30 11:36
105th Japan Amateur Golf Championship 2021
| ROUND 3 | ★：Exempt player |
| POS | Player | Score | Rounds | Total | |||
| R1 | R2 | R3 | R4 | ||||
| - | Naoki Fujiwara | +3 | 76 | 71 | - | - | - |
| - | Wataru Masuda | +3 | 68 | 79 | - | - | - |
| - | Yoshinao Oiwa | +3 | 74 | 73 | - | - | - |
| - | Shotaro Kodama | +3 | 72 | 75 | - | - | - |
| - | ★ Akio Mizukami | +3 | 75 | 72 | - | - | - |
| - | Rio Kagawa | +3 | 75 | 72 | - | - | - |
| - | Hinata Igai | +3 | 75 | 72 | - | - | - |
| - | ★ Yutaka Toyoshima | +3 | 73 | 74 | - | - | - |
| - | Kodai Aoyama | +3 | 74 | 73 | - | - | - |
| - | Ryoma Teranishi | +3 | 75 | 72 | - | - | - |
| - | Kosei Suzuki | +4 | 73 | 75 | - | - | - |
| - | Taiga Iwata | +4 | 73 | 75 | - | - | - |
| - | Kyosei Umeda | +4 | 74 | 74 | - | - | - |
| - | Kodai Nagata | +5 | 74 | 75 | - | - | - |
| - | Osei Tada | +5 | 76 | 73 | - | - | - |
| - | ★ Aran Higashi | +5 | 78 | 71 | - | - | - |
| - | Yuki Nakamura | +5 | 72 | 77 | - | - | - |
| - | Ryusei Dohi | +5 | 74 | 75 | - | - | - |
| - | Gensai Yamada | +5 | 75 | 74 | - | - | - |
| - | Kohei Tsuda | +5 | 70 | 79 | - | - | - |
| - | Kanei Nakasone | +5 | 72 | 77 | - | - | - |
| - | Koichiro Ishika | +5 | 75 | 74 | - | - | - |
| - | Yamato Gibo | +5 | 77 | 72 | - | - | - |
| - | Takuya Hayashida | +5 | 78 | 71 | - | - | - |
| - | Kento Nakazato | +5 | 74 | 75 | - | - | - |
| - | Taisei Kurabayashi | +5 | 77 | 72 | - | - | - |
| - | ★ Jun Ohara | +5 | 75 | 74 | - | - | - |
| - | Yuma Iwai | +5 | 78 | 71 | - | - | - |
| - | Takamasa Endo | +5 | 76 | 73 | - | - | - |
| - | ★ Takahiro Ogawa | +6 | 78 | 72 | - | - | - |
| - | Kazuya Tokiwa | +6 | 76 | 74 | - | - | - |
| - | Shuhei Shimoke | +6 | 71 | 79 | - | - | - |
| - | Soichiro Furukawa | +6 | 77 | 73 | - | - | - |
| - | Kaito Miyazato | +6 | 75 | 75 | - | - | - |
| - | Tatsuki Inoue | +6 | 75 | 75 | - | - | - |
| - | Kaito Yonehara | +6 | 77 | 73 | - | - | - |
| - | Takatora Ota | +6 | 75 | 75 | - | - | - |
| - | Sena Shiraishi | +6 | 79 | 71 | - | - | - |
| - | Shuto Sakamoto | +6 | 79 | 71 | - | - | - |
| - | Jiei Kawai | +6 | 77 | 73 | - | - | - |
| - | Shota Sato | +6 | 75 | 75 | - | - | - |
| - | Takaya Hasegawa | +7 | 78 | 73 | - | - | - |
| - | ★ Taro Miyamoto | +7 | 72 | 79 | - | - | - |
| - | ★ Shingo Matsuo | +7 | 73 | 78 | - | - | - |
| - | ★ Genki Otani | +7 | 77 | 74 | - | - | - |
| - | Yuta Ikeda | +7 | 73 | 78 | - | - | - |
| - | Ryoma Nakama | +7 | 77 | 74 | - | - | - |
| - | Yuta Komura | +7 | 77 | 74 | - | - | - |
| - | ★ Masaya Takahashi | +7 | 79 | 72 | - | - | - |
| - | Yamato Kamimura | +7 | 79 | 72 | - | - | - |
| - | Keisuke Kinoshita | +7 | 75 | 76 | - | - | - |
| - | Yuki Suzaki | +7 | 76 | 75 | - | - | - |
| - | Daito Goto | +7 | 78 | 73 | - | - | - |
| - | Ryoji Mitsunari | +8 | 80 | 72 | - | - | - |
| - | Sho Fukuzumi | +8 | 81 | 71 | - | - | - |
| - | Kentaro Izumi | +8 | 80 | 72 | - | - | - |
| - | Yu Shoji | +8 | 75 | 77 | - | - | - |
| - | Sho Katsumata | +8 | 77 | 75 | - | - | - |
| - | Yamato Sudo | +8 | 78 | 74 | - | - | - |
| - | Yudai Hiroyama | +9 | 79 | 74 | - | - | - |
| - | Yuto Tsukahara | +9 | 82 | 71 | - | - | - |
| - | Ryunosuke Akiyama | +9 | 79 | 74 | - | - | - |
| - | Riura Matsui | +9 | 81 | 72 | - | - | - |
| - | Daisuke Okada | +9 | 78 | 75 | - | - | - |
| - | Naoya Hayashida | +9 | 77 | 76 | - | - | - |
| - | Kota Iwai | +10 | 80 | 74 | - | - | - |
| - | Haruki Tasaki | +10 | 82 | 72 | - | - | - |
| - | Yuta Okabe | +11 | 77 | 78 | - | - | - |
| - | Ichiro Ogasawara | +11 | 79 | 76 | - | - | - |
| - | Shodai Makino | +12 | 79 | 77 | - | - | - |
| - | Tatsumi Suzuki | +12 | 77 | 79 | - | - | - |
| - | Kazuki Gassho | +14 | 80 | 78 | - | - | - |
| - | Kento Hishida | +15 | 77 | 82 | - | - | - |
| - | Yuto Sugisaki | +16 | 79 | 81 | - | - | - |
| - | Takuma Hashimoto | +20 | 86 | 78 | - | - | - |