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Jea Moon Lee vs. Katsuki Nagao - head to head matches
| 20.03.17 | qual. | Jea Moon Lee | Katsuki Nagao | 7-64, 6-4 | match details |  Japan F3 | Hard |
Jea Moon Lee form & Katsuki Nagao form
Jea Moon Lee - last matches
 M15 Andong - Hard | ||||
| 22.05.25 2nd round | vs. Jake Delaney | 2-6, 6-3, 5-7 |  | match details |
| 21.05.25 1st round | vs. Wonmin Kim | 6-2, 7-5 |  | match details |
 M15 Nonthaburi - Hard | ||||
| 30.03.25 fin | vs. Etienne Donnet | 2-6, 6-1, 4-6 | | match details |
| 29.03.25 1/2 | vs. Fitriadi M Rifqi | 7-62, 3-6, 6-4 | | match details |
| 28.03.25 1/4 | vs. Mitsuki Wei Kang Leong | 7-5, 3-6, 7-64 | | match details |
| 27.03.25 2nd round | vs. Yurii Dzhavakian | 6-4, 5-7, 6-0 | | match details |
| 26.03.25 1st round | vs. Yuttana Charoenphon | 6-2, 6-2 | | match details |
| 24.03.25 qual. | vs. Ivan Gretskiy | 7-61, 6-3 | | match details |
| 23.03.25 q 1 | vs. Patrik Oplustil | 6-1, 6-2 | | match details |
| M15 Nonthaburi - Hard | ||||
| 20.03.25 2nd round | vs. Petr Bar Biryukov | 7-5, 4-6, 6-74 | | match details |
| 19.03.25 1st round | vs. Sora Fukuda | 7-66, 6-4 | | match details |
| 17.03.25 qual. | vs. Patrik Oplustil | 6-2, 6-1 | | match details |
| 16.03.25 q 1 | vs. Ivan Gretskiy | 6-4, 1-6, 10-7 | | match details |
| M15 Nonthaburi - Hard | ||||
| 14.03.25 1/4 | vs. Giorgio Tabacco | 6-1, 2-6, 6-74 | | match details |
| 13.03.25 2nd round | vs. Fitriadi M Rifqi | 6-2, 6-4 | | match details |
| 12.03.25 1st round | vs. Ivan Iutkin | 6-2, 6-0 | | match details |
| 10.03.25 qual. | vs. Julien De Cuyper | 6-2, 6-0 | | match details |
| 09.03.25 q 1 | vs. Noppadol Noikor | 6-3, 6-2 | | match details |
| Seoul Challenger - Hard | ||||
| 27.10.24 q 1 | vs. Kokoro Isomura | 5-7, 4-6 | | match details |
| M15 Tokyo - I. hard | ||||
| 13.07.24 1/2 | vs. Woobin Shin | 4-6, 2-6 | | match details |
| 12.07.24 1/4 | vs. Kokoro Isomura | 6-2, 6-4 | | match details |
| 11.07.24 2nd round | vs. Kenta Miyoshi | 7-65, 7-62 | | match details |
| 11.07.24 1st round | vs. Makoto Ochi | 6-0, 3-0, Makoto Ochi - retired | | match details |
| M15 Tokyo - I. hard | ||||
| 05.07.24 1/4 | vs. Naoki Nakagawa | 2-6, 4-6 | | match details |
| 04.07.24 2nd round | vs. Sanhui Shin | 3-6, 7-65, 6-3 | | match details |
| 03.07.24 1st round | vs. Ezekiel Clark | 6-3, 6-3 | | match details |
| M15 Anseong - Hard | ||||
| 11.06.24 1st round | vs. Seungmin Park | 0-3, - Jea Moon Lee - retired | | match details |
| M15 Daegu - Hard | ||||
| 07.06.24 1/4 | vs. Karlis Ozolins | 3-6, 4-6 | | match details |
| 06.06.24 2nd round | vs. Seon Yong Han | 6-1, 6-4 | | match details |
| 04.06.24 1st round | vs. Masamichi Imamura | 6-3, 6-2 | | match details |
Katsuki Nagao - last matches
 Hong Kong - Hard | ||||
| 25.06.17 1st round | vs. Masato Shiga | 2-6, 2-6 | | match details |
| 26.06.17 q 1 | vs. David Barclay | 6-4, 6-2 | | match details |
| 26.06.17 qual. | vs. Leo Julien Sebaoun | 6-2, 6-1 | | match details |
| Hong Kong - Hard | ||||
| 22.06.17 1/4 | vs. Jumpei Yamasaki | 3-6, 1-6 | | match details |
| 21.06.17 2nd round | vs. Francis Casey Alcantara | 4-6, 7-5, 1-0, Francis Casey Alcantara - retired | | match details |
| 21.06.17 1st round | vs. Ye Cong Mo | 6-2, 6-4 | | match details |
| Japan F8 - Carpet | ||||
| 15.06.17 2nd round | vs. Gengo Kikuchi | 2-6, 2-6 | | match details |
| 14.06.17 1st round | vs. Taisei Ichikawa | 6-0, 6-1 | | match details |
| Japan F7 - Hard | ||||
| 05.06.17 q 1 | vs. Rimpei Kawakami | 6-71, 6-72 | | match details |
| Japan F5 - Hard | ||||
| 04.04.17 1st round | vs. Tatsuma Ito | 6-72, 4-6 | | match details |
| 03.04.17 qual. | vs. Hidetoshi Owada | 6-2, 6-4 | | match details |
| 03.04.17 q 1 | vs. Kazuki Shimizu | 6-3, 6-3 | | match details |
| Japan F4 - Hard | ||||
| 27.03.17 q 1 | vs. Ryohei Tagata | 2-6, 6-2, 6-0 | | match details |
| 27.03.17 qual. | vs. Shunrou Takeshima | 2-6, 2-6 | | match details |
| 27.03.17 q 2 | vs. Nasa Hatakeyama | 6-2, 6-3 | | match details |
| Japan F3 - Hard | ||||
| 20.03.17 q 1 | vs. Ryohei Tagata | 6-3, 6-3 | | match details |
| 20.03.17 q 2 | vs. Masamichi Imamura | 6-2, 6-1 | | match details |
| 20.03.17 qual. | vs. Jea Moon Lee | 6-74, 4-6 | | match details |
| Japan F2 - Hard | ||||
| 13.03.17 q 2 | vs. Kenta Miyoshi (1995) | 2-6, 3-6 | | match details |
| Japan F1 - Hard | ||||
| 06.03.17 q 2 | vs. Yuichiro Inui | 6-3, 6-2 | | match details |
| 06.03.17 qual. | vs. Sho Shimabukuro | 3-6, 6-73 | | match details |
| 06.03.17 q 1 | vs. Leo Julien Sebaoun | 2-6, 6-3, 6-3 | | match details |
| Korea F8 - Clay | ||||
| 06.09.16 1st round | vs. Keisuke Numajiri | 6-3, 4-6, 0-6 | | match details |
| Korea F7 - Clay | ||||
| 31.08.16 2nd round | vs. Makoto Ochi | 3-6, 2-6 | | match details |
| 30.08.16 1st round | vs. Jae-Won Choi | 6-3, 7-65 | | match details |
| Korea F6 - Clay | ||||
| 23.08.16 1st round | vs. Jae Hwan Kim | 3-6, 2-6 | | match details |
| Japan F8 - Carpet | ||||
| 15.06.16 2nd round | vs. Yuki Mochizuki | 1-6, 0-6 | | match details |
| 14.06.16 1st round | vs. Yuichi Ito | 6-2, 6-4 | | match details |
| Japan F7 - Hard | ||||
| 07.06.16 2nd round | vs. Kento Takeuchi | 4-6, 1-6 | | match details |
| 07.06.16 1st round | vs. Ryotaro Matsumura | 6-4, 6-4 | | match details |