Round: 25 Ground: Synthetic outdoor
| ITF Japan F6 | 2017/06/04 02:00 | Shintaro Imai v Yusuke Takahashi | 2-6,2-6 |
| ITF Japan F6 | 2017/06/03 02:00 | Sora Fukuda v Shintaro Imai | 4-6,3-6 |
| ITF Japan F6 | 2017/06/02 04:00 | Takeuchi, Kento (1987) v Shintaro Imai | 3-6,4-6 |
| ITF Japan F6 | 2017/05/31 01:00 | Itsusaki, Kaito v Shintaro Imai | 6-3,1-6,3-6 |
| ITF Japan F6 | 2017/05/29 05:50 | Watanuki, Yusuke v Shintaro Imai | 0-6,5-7 |
| ITF China F7 | 2017/05/19 04:30 | Kelly, Dayne v Shintaro Imai | 6-2,7-6 |
| ITF China F7 | 2017/05/17 02:00 | Takeuchi, Kento (1987) v Shintaro Imai | 2-6,4-6 |
| ITF China F7 | 2017/05/16 02:00 | Prashanth, N. Vijay Sundar v Shintaro Imai | 6-7,3-6 |
| ITF Japan F6 Qual | 2017/05/27 01:00 | Furuta, Ibuki v Kai, Naoto | 6-2,6-0 |
| ITF Japan F4 | 2017/03/25 00:00 | Nakamura, Yuki v Kai, Naoto | 6-4,4-6,6-1 |
| ITF Japan F1 | 2017/03/04 03:30 | Furuta, Ibuki v Kai, Naoto | 6-2,6-0 |
| ITF Japan F7 | 2016/06/06 01:00 | Tanuma, Ryota v Kai, Naoto | 6-4,6-3 |
| ITF Japan F4 | 2016/03/26 00:00 | Kikuchi, Gengo v Kai, Naoto | 6-2,7-6 |
| ITF Japan F1 | 2016/03/05 03:00 | Kai, Naoto v Kazuma Kawachi | 6-4,3-6,4-6 |
| ITF Japan F7 Qual | 2015/06/13 00:00 | Kai, Naoto v Numajiri, Keisuke | 2-6,3-6 |