Round: 25 Ground: Hardcourt outdoor
| Challenger Yokohama Qual | 2018/02/26 01:00 | Jumpei Yamasaki v Masamichi Imamura | 4-6,7-6,6-4 |
| ITF M15 Kofu | 2019/03/24 01:30 | Jumpei Yamasaki v Sho Shimabukuro | 7-6,6-3 |
| ITF M15 Kofu | 2019/03/23 02:55 | Jumpei Yamasaki v Ryota Tanuma | 6-2,6-4 |
| ITF M15 Kofu | 2019/03/22 03:50 | Yusuke Takahashi v Jumpei Yamasaki | 3-6,1-6 |
| ITF M15 Kofu | 2019/03/21 04:10 | Jumpei Yamasaki v Min-Kyu Song | 7-5,6-1 |
| ITF M15 Kofu | 2019/03/19 01:00 | Keisuke Saitoh v Jumpei Yamasaki | 2-6,3-6 |
| ITF - M15 Nishi-Tokyo | 2019/03/14 01:00 | Shintaro Imai v Jumpei Yamasaki | 3-6,6-3,6-3 |
| ITF - M15 Nishi-Tokyo | 2019/03/13 02:20 | Jumpei Yamasaki v Michael Look | 6-4,2-6,6-2 |
| ITF M15 Nishi-Tama | 2019/03/09 01:00 | Jumpei Yamasaki v Ji Sung Nam | 2-6,1-6 |
| ITF M15 Kofu | 2019/03/21 05:20 | Sho Shimabukuro v Masamichi Imamura | 6-3,7-6 |
| ITF M15 Kofu | 2019/03/20 03:25 | Taisei Ichikawa v Masamichi Imamura | 6-7,4-6 |
| ITF M15 Kofu | 2019/03/18 04:30 | Masamichi Imamura v Kousuke Ogura | 2-6,6-4,10-6 |
| ITF M15 Kofu | 2019/03/18 00:30 | Masamichi Imamura v Ryuki Matsuda | 7-5,6-3 |
| ITF M15 Nishi-Tama | 2019/03/05 03:00 | Masamichi Imamura v Sho Shimabukuro | 5-7,5-7 |
| ITF M15 Nishi-Tama | 2019/03/05 01:00 | Quentin Folliot v Masamichi Imamura | 1-6,3-6 |
| Challenger Jokohama | 2019/02/26 02:20 | Soonwoo Kwon v Masamichi Imamura | 6-2,6-2 |
| Challenger Jokohama | 2019/02/25 01:00 | Renta Tokuda v Masamichi Imamura | 5-7,2-6 |