| ITF Korea F2 | 06/12 01:00 | 25 | Tae-Woo Lee v Jumpei Yamasaki | 3-6,0-6 | |
| ITF Japan F7 | 06/08 01:00 | 27 | Rio Noguchi v Jumpei Yamasaki | 6-2,6-0 | |
| ITF Japan F7 | 06/07 04:50 | 26 | Kaito Itsusaki v Jumpei Yamasaki | 3-6,4-6 | |
| ITF Japan F7 | 06/04 03:10 | 25 | Kazuki Shimizu v Jumpei Yamasaki | 2-6,4-6 | |
| ITF China F6 | 05/16 02:00 | 26 | Jumpei Yamasaki v Kento Takeuchi | 4-6,6-4,6-7 | |
| ITF China F6 | 05/14 05:45 | 25 | Huixin Wang v Jumpei Yamasaki | 3-6,3-6 | |
| ITF China F5 | 05/12 03:00 | 28 | Jumpei Yamasaki v Rigele Te | 3-6,6-7 | |
| ITF China F5 | 05/11 06:05 | 27 | Jumpei Yamasaki v Kuan-Yi Lee | 6-4,6-4 | |
| ITF China F5 | 05/10 03:00 | 26 | Cheong-Eui Kim v Jumpei Yamasaki | 2-6,5-7 | |
| ITF China F5 | 05/09 02:00 | 25 | Weibowen Zou v Jumpei Yamasaki | 0-6,0-6 | |
| ITF Vietnam F1 | 05/03 03:00 | 27 | Chun Hsin Tseng v Jumpei Yamasaki | 6-2,6-3 | |
| ITF Vietnam F1 | 05/02 03:00 | 26 | Niki Kaliyanda Poonacha v Jumpei Yamasaki | 4-6,6-3,1-6 | |
| ITF Vietnam F1 | 04/30 06:15 | 25 | Justin Barki v Jumpei Yamasaki | 4-6,4-6 | |
| ITF Japan F6 | 04/13 03:15 | 27 | Renta Tokuda v Jumpei Yamasaki | 4-6,6-2,6-4 | |
| ITF Japan F6 | 04/12 01:00 | 26 | Jumpei Yamasaki v Xin Gao | 3-6,7-6,6-4 | |
| ITF Japan F6 | 04/10 01:00 | 25 | Jumpei Yamasaki v Yuya Kibi | 7-6,6-1 | |
| ITF Japan F5 | 04/04 01:00 | 26 | Shintaro Imai v Jumpei Yamasaki | 6-3,6-4 | |
| ITF Japan F5 | 04/02 02:20 | 25 | Jumpei Yamasaki v Soichiro Moritani | 6-1,6-3 | |
| ITF Japan F4 | 03/28 01:00 | 25 | Jumpei Yamasaki v Makoto Ochi | 1-6,2-6 | |
| ITF Japan F4 | 03/26 01:00 | 62 | Jumpei Yamasaki v Teppei Uesugi | 6-2,7-5 | |
| ITF Japan F4 | 03/25 01:00 | 62 | Jumpei Yamasaki v Yuga Tashiro | 6-2,6-3 | |
| ITF Japan F3 | 03/19 01:00 | 25 | Shuichi Sekiguchi v Jumpei Yamasaki | 6-7,7-6,6-2 | |
| ITF Japan F2 | 03/13 03:15 | 25 | Daniel Nguyen v Jumpei Yamasaki | 6-1,2-6,6-1 | |
| ITF Japan F2 | 03/12 00:30 | 44 | Jumpei Yamasaki v Naru Shirafuji | 6-0,6-0 | |
| ITF Japan F2 | 03/11 00:30 | 44 | Jumpei Yamasaki v Takashi Yasugami | 6-0,6-3 | |
| ITF Japan F1 | 03/08 07:15 | 26 | Jumpei Yamasaki v Yuki Mochizuki | 1-6,3-6 | |
| ITF Japan F1 | 03/06 02:00 | 25 | Kaichi Uchida v Jumpei Yamasaki | 6-1,6-7,3-6 | |
| Challenger Yokohama | 02/27 04:45 | 25 | Jumpei Yamasaki v Stephane Robert | 6-3,1-6,3-6 | |
| Challenger Yokohama Qual | 02/26 01:00 | 54 | Jumpei Yamasaki v Masamichi Imamura | 4-6,7-6,6-4 | |
| Challenger Yokohama Qual | 02/25 01:00 | 46 | Maverick Banes v Jumpei Yamasaki | 6-2,1-6,4-6 |