Round: 25 Ground: Hardcourt outdoor
| Kofu, Qualifications Simples M-ITF-JPN-03A | 2019/03/19 02:35 | Shinji Hazawa v Sho Shimabukuro | 3-6,3-6 |
| ITF - M15 Nishi-Tokyo | 2019/03/12 04:45 | Sho Shimabukuro v Shinji Hazawa | 6-3,6-7,6-2 |
| Nishi-Tama, Simples M-ITF-JPN-01A | 2019/03/05 05:25 | Naoki Tajima v Shinji Hazawa | 7-5,6-3 |
| Challenger Yokohama | 2019/02/25 05:15 | Shinji Hazawa v Wang, Tak Khunn | 6-7,4-6 |
| Challenger Da Nang | 2019/01/07 06:30 | Mukund Sasikumar v Shinji Hazawa | 6-1,6-4 |
| Challenger Da Nang | 2019/01/06 05:30 | Yuta Shimizu v Shinji Hazawa | 4-6,4-6 |
| Challenger Kobe | 2018/11/13 04:05 | Shinji Hazawa v Harris, Andrew | 3-6,6-3,3-6 |
| ITF Japan F8 | 2018/06/14 01:00 | Kikuchi, Gengo v Shinji Hazawa | 6-4,6-3 |
| ITF - M15 Sharm El Sheikh | 2019/03/07 08:00 | Manafov, Vladyslav v Kuan-Yi Lee | 6-1,7-6 |
| ITF - M15 Sharm El Sheikh | 2019/03/05 08:00 | Kuan-Yi Lee v Daniel Michalski | 6-0,6-0 |
| ITF - M15 Sharm El Sheikh | 2019/02/27 09:40 | Kuan-Yi Lee v Hossam, Youssef | 6-7,4-6 |
| ITF M15 Anning | 2019/01/17 03:00 | Bessire, Andrea v Kuan-Yi Lee | 1-6,3-6 |
| ITF M15 Anning | 2019/01/15 03:45 | Prashanth, N. Vijay Sundar v Kuan-Yi Lee | 7-5,5-7,6-7 |
| ITF M15 Anning | 2019/01/11 03:00 | Kuan-Yi Lee v Velotti, Agustin | 4-6,5-7 |
| ITF M15 Anning | 2019/01/10 02:00 | Kuan-Yi Lee v Chandrasekar, Anirudh | 1-6,6-3,6-3 |
| ITF M15 Anning | 2019/01/08 04:40 | Kuan-Yi Lee v Zheng, Weiqiang | 6-4,6-2 |