Stadium: Court 4 Round: 27 Ground: Hardcourt outdoor
| Challenger Yokkaichi | 2019/08/07 02:00 | Kazuki Nishiwaki v Yusuke Takahashi | 5-7,6-3,3-6 |
| Challenger Baotou | 2019/08/28 04:40 | Frederico Ferreira Silva v Yusuke Takahashi | 6-3,6-0 |
| Challenger Baotou | 2019/08/27 07:05 | Yusuke Takahashi v Rhett Purcell | 7-5,6-3 |
| Challenger Yokkaichi | 2019/08/08 06:05 | Hyeon Chung v Yusuke Takahashi | 3-6,6-1,6-4 |
| Challenger Yokkaichi | 2019/08/07 02:00 | Kazuki Nishiwaki v Yusuke Takahashi | 5-7,6-3,3-6 |
| Challenger Chengdu | 2019/07/30 08:05 | Yusuke Takahashi v Yan Bai | 4-6,2-6 |
| Challenger Chengdu | 2019/07/29 10:45 | Issei Okamura v Yusuke Takahashi | 1-6,2-6 |
| ITF M25 Taipei | 2019/07/26 02:00 | Yusuke Takahashi v Renta Tokuda | 1-6,5-7 |
| ITF M25 Taipei | 2019/07/25 04:30 | Yusuke Takahashi v Jumpei Yamasaki | 6-2,6-2 |
| ITF M15 Cancun | 2019/08/20 20:20 | Jose Olivares v Kazuki Nishiwaki | 6-3,3-6,6-0 |
| Challenger Yokkaichi | 2019/08/07 02:00 | Kazuki Nishiwaki v Yusuke Takahashi | 5-7,6-3,3-6 |
| Challenger Yokkaichi | 2019/08/06 01:00 | Courtney John Lock v Kazuki Nishiwaki | 2-6,2-6 |
| ITF M15 Singapore | 2019/06/15 03:00 | Jonathan Gray v Kazuki Nishiwaki | 6-3,7-5 |
| ITF M15 Singapore | 2019/06/14 05:30 | Kazuki Nishiwaki v Benard Bruno Nkomba | 6-3,6-0 |
| ITF M15 Singapore | 2019/06/13 02:00 | Kazuki Nishiwaki v Abhinav Sanjeev Shanmugam | 7-6,6-2 |
| ITF M15 Singapore | 2019/06/11 07:45 | Kazuki Nishiwaki v Shamirul S Mohd Adam Das | 6-0,6-1 |
| ITF M15 Singapore | 2019/06/04 02:00 | Cameron Green v Kazuki Nishiwaki | 7-6,6-1 |