Stadium: Court G Round: 24 Ground: Hardcourt indoor
| ITF Chinese Taipei F2 | 2016/10/21 02:00 | Ryota Tanuma v Takuto Niki | 4-6,5-7 |
| ITF Japan F4 | 2016/03/30 01:00 | Takuto Niki v Ryota Tanuma | 4-6,5-7 |
| ITF M25 Nonthaburi | 2019/08/01 05:25 | Ryota Tanuma v Sergey Fomin | 1-6,4-6 |
| ITF M25 Nonthaburi | 2019/07/30 06:25 | Ryota Tanuma v Soichiro Moritani | 6-2,2-6,6-3 |
| ITF M25 Nonthaburi | 2019/07/23 06:05 | Harry Bourchier v Ryota Tanuma | 4-6,6-3,7-5 |
| ITF M25 Taipei | 2019/07/16 06:25 | Tsung-Hao Huang v Ryota Tanuma | 6-4,6-2 |
| ITF M15 Anseong | 2019/06/27 02:55 | Haru Inoue v Ryota Tanuma | 6-2,6-2 |
| ITF M15 Anseong | 2019/06/26 02:45 | Shinnosuke Hiramatsu v Ryota Tanuma | 5-7,6-4,4-6 |
| ITF M15 Gimcheon | 2019/06/22 02:25 | Seong Chan Hong v Ryota Tanuma | 6-3,6-0 |
| ITF M15 Gimcheon | 2019/06/21 01:00 | Ryota Tanuma v Cheong-Eui Kim | 6-2,6-7,7-5 |
| ITF M25 Yinchuan | 2019/06/29 07:35 | Yan Bai v Takuto Niki | 6-1,7-5 |
| ITF M25 Yinchuan | 2019/06/29 02:00 | Takuto Niki v Xin Gao | 6-2,6-4 |
| ITF M25 Yinchuan | 2019/06/28 07:15 | Takuto Niki v Ivan Liutarevich | 7-6,7-5 |
| ITF M25 Yinchuan | 2019/06/28 03:20 | Chien Hsun Lo v Takuto Niki | 3-6,6-4,0-6 |
| ITF M15 Gimcheon | 2019/06/21 01:00 | Yuta Shimizu v Takuto Niki | 6-2,7-6 |
| ITF M15 Gimcheon | 2019/06/20 04:05 | Seonyong Han v Takuto Niki | 4-6,2-6 |
| ITF M15 Gimcheon | 2019/06/19 02:30 | Conor Berg v Takuto Niki | 4-6,1-6 |
| ITF M15 Gimcheon | 2019/06/12 01:00 | Takuto Niki v Young-Hoon Jeong | 4-6,6-7 |