Stadium: Court F Round: 25 Ground: Hardcourt outdoor
| ITF M15 Anning | 2019/01/18 03:00 | Yan Bai v Naoki Tajima | 3-6,6-1,6-0 |
| ITF M15 Anning | 2019/01/17 03:00 | Naoki Tajima v Michael Zhu | 6-2,6-3 |
| ITF M15 Anning | 2019/01/15 02:00 | Naoki Tajima v Liran Chen | 6-2,6-1 |
| ITF M15 Anning | 2019/01/13 03:00 | Naoki Tajima v Agustin Velotti | 6-4,3-6,5-7 |
| ITF M15 Anning | 2019/01/12 03:00 | Naoki Tajima v Shao-Fan Liu | 2-6,6-1,6-3 |
| ITF M15 Anning | 2019/01/11 03:00 | Naoki Tajima v N. Vijay Sundar Prashanth | 6-3,6-2 |
| ITF M15 Anning | 2019/01/10 04:30 | Issei Okamura v Naoki Tajima | 6-4,3-6,4-6 |
| ITF M15 Anning | 2019/01/09 07:55 | Ye Cong Mo v Naoki Tajima | 6-3,4-6,3-6 |
| Challenger Yokohama | 2019/02/25 05:15 | Shinji Hazawa v Tak Khunn Wang | 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 Andrew Harris | 3-6,6-3,3-6 |
| ITF Japan F8 | 2018/06/14 01:00 | Gengo Kikuchi v Shinji Hazawa | 6-4,6-3 |
| ITF Japan F8 | 2018/06/13 03:20 | Shinji Hazawa v Thomas Fancutt | 6-1,6-2 |
| ITF Japan F7 | 2018/06/05 02:45 | Yuga Tashiro v Shinji Hazawa | 7-5,7-6 |
| ITF Japan F6 Qual | 2018/04/08 01:00 | Shinji Hazawa v Teppei Uesugi | 6-4,4-6,6-7 |