Stadium: Court 1 Round: 44 Ground: Hardcourt outdoor
| ITF Japan F1 | 2018/03/08 07:15 | Jumpei Yamasaki v Yuki Mochizuki | 1-6,3-6 |
| 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 Stephane Robert | 6-3,1-6,3-6 |
| Challenger Yokohama Qual | 2018/02/26 01:00 | Jumpei Yamasaki v Masamichi Imamura | 4-6,7-6,6-4 |
| Challenger Yokohama Qual | 2018/02/25 01:00 | Maverick Banes v Jumpei Yamasaki | 6-2,1-6,4-6 |
| Challenger Yokohama Qual | 2018/02/24 01:00 | Kento Takeuchi 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 Louis Lechevretel | 6-3,6-4 |
| ITF Japan F2 | 2018/03/10 00:30 | Yuga Tashiro v Takashi Yasugami | 6-7,6-2,4-6 |
| ITF Japan F5 | 2017/04/01 02:00 | Takashi Yasugami v Keisuke Watanuki | 4-6,6-2,5-7 |
| ITF Japan F4 | 2017/03/27 01:00 | Takashi Yasugami v Yuki Matsuo | 7-6,1-6,1-6 |
| ITF Japan F2 | 2017/03/14 04:00 | Takashi Yasugami v Renta Tokuda | 4-6,2-6 |
| ITF Japan F2 | 2017/03/13 01:00 | Takashi Yasugami v Naru Shirafuji | 7-6,6-4 |
| ITF Japan F2 | 2017/03/12 02:00 | Wei-De Lin v Takashi Yasugami | 7-5,5-7,4-6 |