Stadium: Court 3 Round: 166 Ground: Hardcourt outdoor
| Challenger Gimcheon | 2018/05/08 05:40 | Lee, Young Seok v Makoto Ochi | 1-6,1-6 |
| Nanchang, China | 2019/04/23 10:00 | Makoto Ochi v Lopez Perez | 3-6,0-6 |
| Nanchang, China | 2019/04/22 04:55 | Tung-Lin Wu v Makoto Ochi | 3-6,2-6 |
| Anning, China | 2019/04/16 03:25 | Makoto Ochi v Jason Kubler | 2-6,1-6 |
| Anning, China | 2019/04/15 04:30 | Makoto Ochi v Li, Yuanfeng | 6-2,7-6 |
| Challenger - Taipei | 2019/04/08 12:00 | Makoto Ochi v Yang, Tsung-Hua | 4-6,3-6 |
| ITF - M15 Kashiwa | 2019/04/05 01:00 | Shintaro Imai v Makoto Ochi | 2-6,6-7 |
| ITF - M15 Kashiwa | 2019/04/04 02:40 | Shinji Hazawa v Makoto Ochi | 2-6,1-6 |
| ITF - M15 Kashiwa | 2019/04/02 02:20 | Yu Hsiou Hsu v Makoto Ochi | 4-6,5-7 |
| ITF M15 Anning | 2019/01/14 05:30 | Grigoriy Lomakin v Lee, Young Seok | 6-1,4-6,13-11 |
| ITF M15 Anning | 2019/01/14 01:30 | Lee, Young Seok v Ruikai Wang | 6-3,5-7,10-3 |
| ITF M15 Anning | 2018/12/31 01:30 | Lee, Young Seok v Ye Cong Mo | 2-6,6-1,3-10 |
| ITF Korea F5 | 2018/08/18 01:00 | Lee, Young Seok v Lee, Seounghun | 3-6,2-6 |
| ITF Korea F4 | 2018/08/16 03:05 | Lee, Young Seok v Uisung Park | 2-6,0-6 |
| ITF Korea F4 | 2018/08/14 01:00 | Addison, Aaron v Lee, Young Seok | 6-0,3-6,2-6 |
| ITF Korea F4 | 2018/08/12 02:00 | Shin, Jung Ho v Lee, Young Seok | 3-6,3-6 |
| Challenger Gimcheon | 2018/05/08 05:40 | Lee, Young Seok v Makoto Ochi | 1-6,1-6 |