Stadium: Court 10 Round: 26 Ground: Hardcourt outdoor
| ITF M15 Wuhan | 2019/05/01 03:50 | Xin Gao v Kazuki Nishiwaki | 6-2,3-6,3-6 |
| ITF M25 Matsuyama | 2019/04/10 07:40 | Rinky Hijikata v Kazuki Nishiwaki | 6-3,6-4 |
| ITF M15 Kashiwa | 2019/04/01 06:00 | Kuan-Yi Lee v Kazuki Nishiwaki | 6-4,6-4 |
| ITF M15 Kashiwa | 2019/04/01 00:00 | Daisuke Sumizawa v Kazuki Nishiwaki | 6-2,2-6,8-10 |
| ITF M15 Tsukuba | 2019/03/27 01:00 | Makoto Ochi v Kazuki Nishiwaki | 6-3,6-1 |
| ITF M15 Kofu | 2019/03/20 05:10 | Mick Veldheer v Kazuki Nishiwaki | 4-6,6-1,6-4 |
| ITF M15 Sharm El Sheikh | 2019/02/18 12:15 | Kazuki Nishiwaki v Giorgio Ricca | 7-5,6-7,6-10 |
| ITF M15 Sharm El Sheikh | 2019/02/18 07:30 | Kazuki Nishiwaki v Mathys Erhard | 6-0,6-1 |
| ITF M15 Wuhan | 2019/05/01 03:25 | Hanyi Liu v Sora Fukuda | 4-6,2-6 |
| ITF M25 Matsuyama | 2019/04/10 07:05 | Sora Fukuda v Cheong-Eui Kim | 6-3,2-6,3-6 |
| ITF M15 Kashiwa | 2019/04/03 01:55 | Shinji Hazawa v Sora Fukuda | 6-1,5-7,6-1 |
| ITF M15 Nishi-Tokyo | 2019/03/13 01:00 | Sora Fukuda v Hiroyasu Ehara | 3-6,7-5,1-6 |
| ITF M15 Nishi-Tama | 2019/03/06 01:00 | Sora Fukuda v Hong Kit Wong | 7-6,6-3 |
| ITF M15 Anning | 2019/01/09 07:30 | Sora Fukuda v Soichiro Moritani | 3-6,2-6 |
| ITF M15 Anning | 2019/01/02 07:05 | Haitong Xia v Sora Fukuda | 6-4,3-6,6-3 |
| ITF Pakistan F2 | 2018/12/14 06:00 | Cheong-Eui Kim v Sora Fukuda | 6-0,6-3 |