Stadium: Centre Court Round: 25 Ground: Hardcourt outdoor
| ITF Japan F3 | 2015/03/26 02:40 | Shintaro Imai v Naoki Nakagawa | 6-3,2-6,6-7 |
| ITF M25 Tay Ninh | 2019/10/03 02:00 | Yusuke Takahashi v Naoki Nakagawa | 6-4,6-3 |
| ITF M25 Tay Ninh | 2019/10/02 02:00 | Credit Chaiyarin v Naoki Nakagawa | 4-6,0-6 |
| ITF M15 Cancun | 2019/09/13 21:15 | Gage Brymer v Naoki Nakagawa | 6-3,6-2 |
| ITF M15 Cancun | 2019/09/12 17:00 | Naoki Nakagawa v Alejandro Mendoza | 6-3,6-2 |
| ITF M15 Cancun | 2019/09/11 18:15 | Naoki Nakagawa v Matt Kuhar | 6-3,4-6,6-2 |
| ITF M15 Cancun | 2019/08/29 16:20 | Naoki Nakagawa v Jose Olivares | 7-6,3-6,4-6 |
| ITF M15 Cancun | 2019/08/28 17:25 | Naoki Nakagawa v Jiaxi Ma | 6-3,6-0 |
| ITF M15 Cancun | 2019/07/12 13:30 | Naoki Nakagawa v Gage Brymer | 4-6,4-6 |
| Challenger Kaohsiung | 2019/09/16 06:30 | Shintaro Imai v Renta Tokuda | 3-6,4-6 |
| Challenger Shanghai | 2019/09/09 06:25 | Arjun Kadhe v Shintaro Imai | 7-6,6-3 |
| Challenger Jinan | 2019/09/02 03:40 | Shintaro Imai v Chun Hsin Tseng | 5-7,6-4,2-6 |
| Challenger Yokkaichi | 2019/08/08 04:05 | Shintaro Imai v James Duckworth | 2-6,3-6 |
| Challenger Yokkaichi | 2019/08/06 02:50 | Nam Hoang Ly v Shintaro Imai | 6-2,2-6,3-6 |
| Challenger Yokkaichi | 2019/08/05 05:05 | Shintaro Imai v Naoki Tajima | 6-2,6-3 |
| ITF M25 Nonthaburi | 2019/08/03 04:35 | Renta Tokuda v Shintaro Imai | 6-4,7-5 |
| ITF M25 Nonthaburi | 2019/08/02 03:00 | Shintaro Imai v Sergey Fomin | 6-2,6-7,6-4 |