Stadium: Court 7 Round: 166 Ground: Hardcourt outdoor
| ITF M25 Taipei | 2019/07/23 03:50 | Ren Nakamura v Sam Taylor | 4-6,7-5,6-10 |
| ITF M25 Taipei | 2019/07/22 02:00 | Ren Nakamura v Harry Thursfield | 6-2,6-2 |
| ITF M25 Taipei | 2019/07/16 03:50 | Ren Nakamura v Seita Watanabe | 6-4,4-6,5-10 |
| ITF M15 Anseong | 2019/06/26 04:30 | Sung Hun Kim v Ren Nakamura | 7-6,1-6,6-0 |
| ITF M15 Gimcheon | 2019/06/18 01:00 | Ren Nakamura v Minjong Park | 5-7,6-7 |
| ITF M15 Gimcheon | 2019/06/17 01:00 | Ren Nakamura v Sam Ryan Ziegann | 2-6,6-2,10-7 |
| ITF M15 Karuizawa | 2019/05/30 06:15 | Gengo Kikuchi v Ren Nakamura | 6-2,6-2 |
| ITF M15 Karuizawa | 2019/05/29 04:20 | Ren Nakamura v Winter Meagher | 6-3,6-2 |
| 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 |
| ITF M15 Singapore | 2019/05/29 03:55 | Maksim Tikhomirov v Kazuki Nishiwaki | 6-3,6-4 |
| ITF M25 Wuhan | 2019/05/06 02:00 | Kazuki Nishiwaki v Jianhui Li | 5-7,6-2,6-10 |
| ITF M15 Wuhan | 2019/05/02 02:00 | Kazuki Nishiwaki v Sora Fukuda | 2-6,1-6 |