Stadion: 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 - M15 - Fayetteville | 2019/09/20 19:30 | Takuto Niki v Oscar Mesquida Berg | 7-6,3-6,6-4 |
| ITF - M15 - Fayetteville | 2019/09/19 14:00 | Takuto Niki v Eduardo Nava | 7-5,7-5 |
| ITF - M15 - Fayetteville | 2019/09/18 14:00 | Takuto Niki v Ryan Goetz | 7-5,6-4 |
| ITF - M15 - Champaign | 2019/09/11 16:00 | Takuto Niki v Matheus P De Almeida | 1-6,5-7 |
| ITF - M15 - Sajur | 2019/09/05 07:50 | Yair Sarouk v Takuto Niki | 7-5,6-3 |
| ITF - M15 - Sajur | 2019/09/04 12:35 | Ran Amar v Takuto Niki | 0-6,3-6 |
| ITF - M15 - Kiryat Shmona | 2019/08/30 07:00 | Takuto Niki v Riccardo Maiga | 6-7,6-2,3-6 |
| ITF - M15 - Kiryat Shmona | 2019/08/29 12:05 | Takuto Niki v Yair Sarouk | 7-5,6-4 |