| ITF M25 Nonthaburi | 02/02 06:00 | 44 | Reese Stalder v Kazuki Nishiwaki | 7-6,7-5 | |
| ITF M25 Nonthaburi | 01/26 02:40 | 44 | Kazuki Nishiwaki v Rimpei Kawakami | 6-7,2-6 | |
| Challenger de Kobe | 11/04 08:30 | 24 | Kazuki Nishiwaki v Yosuke Watanuki | 3-6,4-6 | |
| Challenger de Kobe | 11/04 01:30 | 28 | Kazuki Nishiwaki v Timur Khabibulin | 3-6,1-6 | |
| ITF M25 Tay Ninh | 10/10 05:00 | 26 | Billy Harris v Kazuki Nishiwaki | 6-4,6-4 | |
| ITF M25 Tay Ninh | 10/09 03:40 | 25 | Kazuki Nishiwaki v Tsung-Hua Yang | 2-6,6-4,6-4 | |
| ITF M25 Tay Ninh | 10/05 09:00 | 28 | Kazuki Nishiwaki v Daniel Nguyen | 2-6,3-6 | |
| ITF M25 Tay Ninh | 10/04 08:10 | 27 | Yusuke Takahashi v Kazuki Nishiwaki | 0-6,6-3,2-6 | |
| ITF M25 Tay Ninh | 10/03 02:00 | 26 | Kazuki Nishiwaki v Shao-Fan Liu | 4-6,6-2,6-3 | |
| ITF M25 Tay Ninh | 10/01 06:05 | 25 | Kazuki Nishiwaki v Chien Hsun Lo | 6-3,6-4 | |
| Challenger de Shanghái | 09/10 02:30 | 24 | Kazuki Nishiwaki v Jumpei Yamasaki | 3-6,2-6 | |
| Challenger de Shanghái | 09/09 02:00 | 166 | Kazuki Nishiwaki v N.Sriram Balaji | 6-4,6-3 |