Stadion: Court 2 Round: 27 Ground: Hardcourt outdoor
| ITF - Hongkong F5 | 2016/12/29 23:00 | Shuichi Sekiguchi v Shintaro Imai | 7-6,6-3 |
| ITF - M15 - Nishi-Tokyo | 2019/03/14 03:45 | Shuichi Sekiguchi v Yuki Mochizuki | 6-2,6-1 |
| ITF - M15 - Nishi-Tokyo | 2019/03/13 01:00 | Shuichi Sekiguchi v Keisuke Saitoh | 6-3,6-2 |
| ITF - M25 - Mildura | 2019/03/09 01:00 | Shuichi Sekiguchi v Brydan Klein | 7-6,1-6,1-6 |
| ITF - M25 - Mildura | 2019/03/08 02:40 | Yuta Shimizu v Shuichi Sekiguchi | 3-6,3-6 |
| ITF - M25 - Mildura | 2019/03/07 02:00 | Issei Okamura v Shuichi Sekiguchi | 3-6,6-3,2-6 |
| ITF - M25 - Mildura | 2019/03/05 01:30 | Alexis Canter v Shuichi Sekiguchi | 6-7,1-6 |
| ITF M25 Albury | 2019/03/02 00:00 | Brydan Klein v Shuichi Sekiguchi | 6-3,6-2 |
| ITF M25 Albury | 2019/02/28 23:30 | Shuichi Sekiguchi v Thomas Fancutt | 5-7,6-1,6-4 |
| 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 03:50 | Shintaro Imai v Naoki Tajima | 6-1,6-4 |
| ITF - M15 - Nishi-Tama | 2019/03/10 01:00 | Shintaro Imai v Ji Sung Nam | 6-2,6-2 |
| ITF - M15 - Nishi-Tama | 2019/03/09 01:00 | Shintaro Imai v Sho Shimabukuro | 6-4,6-3 |
| ITF - M15 - Nishi-Tama | 2019/03/08 04:10 | Shintaro Imai v Tomohiro Masabayashi | 6-3,6-2 |
| ITF - M15 - Nishi-Tama | 2019/03/07 04:00 | Shintaro Imai v Sho Katayama | 6-2,6-3 |
| ITF - M15 - Nishi-Tama | 2019/03/05 03:30 | Yusuke Takahashi v Shintaro Imai | 1-6,7-5,3-6 |
| Challenger - Yokohama | 2019/02/26 01:00 | Shintaro Imai v David Perez Sanz | 2-6,3-6 |