Stadium: Court B Round: 28 Ground: Hardcourt outdoor
| ITF M15 Nishi-Tama | 2019/03/10 01:00 | Shintaro Imai v Ji Sung Nam | 6-2,6-2 |
| ITF M25 Nonthaburi | 2019/05/24 04:00 | Ji Sung Nam v Khumoyun Sultanov | 6-3,6-1 |
| ITF M25 Nonthaburi | 2019/05/23 06:00 | Ji Sung Nam v Ryota Tanuma | 7-6,6-3 |
| Challenger Gwangju | 2019/05/14 06:00 | Ji Sung Nam v Yuichi Sugita | 2-6,2-6 |
| Challenger Gwangju | 2019/05/13 02:00 | Ji Sung Nam v Rio Noguchi | 6-2,6-1 |
| Challenger Busan | 2019/05/06 07:40 | Cem Ilkel v Ji Sung Nam | 6-4,7-6 |
| Challenger Seoul | 2019/05/01 02:00 | Ji Sung Nam v Ramkumar Ramanathan | 3-6,6-7 |
| Challenger Seoul | 2019/04/30 03:35 | Ji Sung Nam v Duckhee Lee | 7-5,6-1 |
| Challenger Seoul | 2019/04/29 02:00 | Ji Sung Nam v Ji Hoon Son | 6-3,6-2 |
| ITF M25 Nonthaburi | 2019/05/24 06:30 | Shintaro Imai v Palaphoom Kovapitukted | 6-0,6-1 |
| ITF M25 Nonthaburi | 2019/05/23 03:00 | Shintaro Imai v Yu Hsiou Hsu | 6-4,7-6 |
| ITF M25 Nonthaburi | 2019/05/21 07:05 | Blake Ellis v Shintaro Imai | 7-6,3-6,2-6 |
| Challenger Gwangju | 2019/05/14 05:35 | Shintaro Imai v Zhe Li | 3-6,1-6 |
| Challenger Gwangju | 2019/05/13 03:55 | Shintaro Imai v Maverick Banes | 3-6,6-4,6-2 |
| Challenger Seoul | 2019/04/30 02:00 | Soonwoo Kwon v Shintaro Imai | 6-3,6-2 |
| Challenger Seoul | 2019/04/29 03:30 | Shintaro Imai v Hong Chung | 6-1,6-3 |
| ITF M15 Kashiwa | 2019/04/05 01:00 | Shintaro Imai v Makoto Ochi | 2-6,6-7 |