Stadium: Court 2 Round: 28 Ground: Hardcourt outdoor
| ITF Japan F5 | 2018/04/04 01:00 | Shintaro Imai v Jumpei Yamasaki | 6-3,6-4 |
| ITF Hong Kong F2 | 2017/06/29 02:00 | Jumpei Yamasaki v Shintaro Imai | 4-6,2-6 |
| Challenger Chengdu Qual | 2018/07/28 02:00 | Miliaan Niesten v Jumpei Yamasaki | 6-2,6-2 |
| Challenger Granby Qual | 2018/07/21 16:25 | Taha Baadi v Jumpei Yamasaki | 7-6,6-4 |
| Challenger Gatineau Qual | 2018/07/14 21:55 | Jacob Grills v Jumpei Yamasaki | 6-3,6-1 |
| Challenger Winnipeg Qual | 2018/07/08 18:05 | Sem Verbeek v Jumpei Yamasaki | 7-6,7-6 |
| ITF Hong Kong F1 | 2018/06/29 02:00 | Jumpei Yamasaki v Yuki Mochizuki | 4-6,4-6 |
| ITF Hong Kong F1 | 2018/06/28 02:00 | Chukang Wang v Jumpei Yamasaki | 0-6,2-6 |
| ITF Hong Kong F1 | 2018/06/27 03:45 | Anthony Jackie Tang v Jumpei Yamasaki | 7-5,3-6,1-6 |
| ITF Hong Kong F1 | 2018/06/26 03:15 | Wei-De Lin v Jumpei Yamasaki | 3-6,3-6 |
| Challenger Granby Qual | 2018/07/22 21:30 | Jacob Grills v Shintaro Imai | 6-4,6-1 |
| Challenger Granby Qual | 2018/07/21 15:55 | Liam Draxl v Shintaro Imai | 4-6,2-6 |
| Challenger Gatineau Qual | 2018/07/14 18:05 | Shintaro Imai v Antoine Escoffier | 4-6,6-3,1-6 |
| ITF Hong Kong F2 | 2018/07/07 02:00 | Maverick Banes v Shintaro Imai | 7-5,6-2 |
| ITF Hong Kong F2 | 2018/07/06 02:00 | Shintaro Imai v Ryota Tanuma | 6-2,6-2 |
| ITF Hong Kong F2 | 2018/07/05 02:00 | Issei Okamura v Shintaro Imai | 2-6,1-6 |
| ITF Hong Kong F2 | 2018/07/04 02:00 | Hei Yin Andrew Li v Shintaro Imai | 2-6,0-6 |
| ITF Hong Kong F2 | 2018/07/02 04:00 | Yuki Mochizuki v Shintaro Imai | 6-4,5-7,3-6 |