Stadium: Court 6 Round: 25 Ground: Clay
| ITF Japan F3 | 2016/03/24 03:15 | Shintaro Imai v Gao, Xin | 6-7,3-6 |
| ITF Japan F5 | 2018/04/04 04:50 | Zhe Li v Gao, Xin | 6-3,7-5 |
| ITF Japan F5 | 2018/04/03 01:00 | Cing-Yang Meng v Gao, Xin | 2-6,4-6 |
| ITF Japan F4 | 2018/03/27 01:00 | Hong, Seong Chan v Gao, Xin | 6-3,6-4 |
| Challenger Qujing | 2018/03/19 02:00 | Hiroki Moriya v Gao, Xin | 6-7,6-4,6-2 |
| Shenzhen, China, Qualifying | 2018/03/11 09:10 | Gao, Xin v Hiroki Moriya | 4-6,4-6 |
| Shenzhen, China, Qualifying | 2018/03/11 05:10 | Elgin, M. v Gao, Xin | 3-6,4-6 |
| Challenger Zhuhai Qual | 2018/03/03 04:50 | Gao, Xin v Renta Tokuda | 3-6,1-6 |
| Hong Kong F4, Simples | 2017/12/21 02:00 | Gao, Xin v Rio Noguchi | 6-1,6-3 |
| ITF Japan F5 | 2018/04/05 02:00 | Shintaro Imai v Ehara, Hiroyasu | 3-6,5-7 |
| ITF Japan F5 | 2018/04/04 01:00 | Shintaro Imai v Jumpei Yamasaki | 6-3,6-4 |
| ITF Japan F5 | 2018/04/02 03:10 | Shintaro Imai v Grills, Jacob | 6-1,6-1 |
| ITF Japan F4 | 2018/03/30 01:00 | Kuan-Yi Lee v Shintaro Imai | 6-1,2-6,6-3 |
| ITF Japan F4 | 2018/03/29 04:15 | Naoki Tajima v Shintaro Imai | 4-6,3-6 |
| ITF Japan F4 | 2018/03/27 01:00 | Kawahashi, Yuta v Shintaro Imai | 3-6,3-6 |
| ITF Japan F3 | 2018/03/22 05:25 | Kaito Uesugi v Shintaro Imai | 6-3,2-6,6-1 |
| ITF Japan F3 | 2018/03/19 04:30 | Rio Noguchi v Shintaro Imai | 6-7,4-6 |