Stadium: Indoor 6 Round: 26 Ground: Hardcourt outdoor
| ITF Hong Kong F1 | 2017/06/23 02:30 | Jumpei Yamasaki v Yuki Mochizuki | 5-7,2-6 |
| ITF Japan F1 | 2018/03/06 02:00 | Kaichi Uchida v Jumpei Yamasaki | 6-1,6-7,3-6 |
| Challenger Yokohama | 2018/02/27 04:45 | Jumpei Yamasaki v Robert, Stephane | 6-3,1-6,3-6 |
| Yokohama, Japan, Qualifying | 2018/02/26 01:00 | Jumpei Yamasaki v Masamichi Imamura | 4-6,7-6,6-4 |
| Yokohama, Japan, Qualifying | 2018/02/25 01:00 | Banes, Maverick v Jumpei Yamasaki | 6-2,1-6,4-6 |
| Yokohama, Japan, Qualifying | 2018/02/24 01:00 | Takeuchi, Kento (1987) v Jumpei Yamasaki | 3-6,3-6 |
| ITF Egypt F3 | 2018/01/31 16:40 | Jumpei Yamasaki v Riccardo Bonadio | 2-6,6-7 |
| ITF Egypt F3 | 2018/01/29 08:00 | Jumpei Yamasaki v Lechevretel, Louis | 6-3,6-4 |
| ITF Egypt F3 | 2018/01/28 08:00 | Jumpei Yamasaki v Ren Nakamura | 6-1,7-5 |
| ITF Japan F1 | 2018/03/07 03:15 | Yuki Mochizuki v Shirafuji, Naru | 6-4,6-3 |
| Challenger Kobe Qual | 2017/11/04 02:00 | Yuki Mochizuki v Matosevic, Marinko | 4-6,3-6 |
| ITF Hong Kong F2 | 2017/07/01 01:30 | Grills, Jacob v Yuki Mochizuki | 5-7,1-6 |
| ITF Hong Kong F2 | 2017/06/29 02:00 | Hu, Nicholas S v Yuki Mochizuki | 6-7,4-6 |
| ITF Hong Kong F2 | 2017/06/28 03:15 | Yuki Mochizuki v Zhyrmont, Dzmitry | 6-1,6-4 |
| ITF Hong Kong F2 | 2017/06/27 02:30 | Butts, Skyler v Yuki Mochizuki | 6-3,4-6,5-7 |
| ITF Hong Kong F1 | 2017/06/24 02:30 | He, Yecong v Yuki Mochizuki | 6-2,6-3 |
| ITF Hong Kong F1 | 2017/06/23 02:30 | Jumpei Yamasaki v Yuki Mochizuki | 5-7,2-6 |