Stadium: Court C Round: 25 Ground: Hardcourt outdoor
| ITF M15 Tsukuba | 2019/03/28 02:10 | Ryohei Tagata v Takuto Niki | 3-6,6-2,7-5 |
| ITF M15 Akishima | 2019/06/15 03:30 | Ryohei Tagata v Yuta Kikuchi | 6-4,2-6,2-6 |
| ITF M15 Akishima | 2019/06/14 01:00 | Ryohei Tagata v Sho Katayama | 7-6,6-4 |
| ITF M15 Akishima | 2019/06/13 02:45 | Haru Inoue v Ryohei Tagata | 6-4,3-6,2-6 |
| ITF M15 Akishima | 2019/06/12 01:00 | Ryohei Tagata v Kenta Kurita | 6-2,6-3 |
| ITF M15 Tsukuba | 2019/03/28 02:10 | Ryohei Tagata v Takuto Niki | 3-6,6-2,7-5 |
| ITF M15 Tsukuba | 2019/03/26 01:00 | Ryohei Tagata v Yuta Kawahashi | 4-6,6-2,6-1 |
| ITF Japan F4 | 2018/03/27 02:30 | Ryohei Tagata v Yuta Shimizu | 4-6,4-6 |
| ITF Japan F3 | 2018/03/17 04:00 | Ryohei Tagata v Masaki Sasai | 5-7,6-3,2-6 |
| 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 |