Round: 26 Ground: Synthetic outdoor
| ITF Japan F2 | 2017/03/16 04:05 | Katayama, Sho v Niki, Takuto | 3-6,7-6,6-4 |
| ITF Japan F5 | 2016/04/08 06:25 | Niki, Takuto v Katayama, Sho | 7-6,2-6,3-6 |
| ITF Japan F7 | 2017/06/06 01:00 | Niki, Takuto v Watanuki, Yusuke | 5-7,7-5,6-4 |
| ITF Japan F6 | 2017/06/02 04:00 | Niki, Takuto v Sora Fukuda | 6-3,4-6,3-6 |
| ITF Japan F6 | 2017/06/01 02:00 | Niki, Takuto v Masaya Kobayashi | 6-2,6-3 |
| ITF Japan F6 | 2017/05/31 01:00 | Niki, Takuto v Masaya Kobayashi | 6-2,6-3 |
| ITF Japan F6 | 2017/05/30 03:30 | Niki, Takuto v Furuta, Ibuki | 6-2,6-2 |
| ITF China F8 | 2017/05/26 04:20 | Rubin Statham v Niki, Takuto | 7-6,7-6 |
| ITF China F8 | 2017/05/25 05:25 | Wang, Chuhan v Niki, Takuto | 3-6,1-6 |
| ITF China F8 | 2017/05/25 02:00 | Wang, Chuhan v Niki, Takuto | 3-6,1-6 |
| ITF Japan F7 | 2017/06/06 04:45 | Kishi, Ryota v Katayama, Sho | 2-6,2-6 |
| ITF Singapore F2 | 2017/05/31 05:05 | Nam Hoang Ly v Katayama, Sho | 6-2,6-4 |
| ITF Singapore F1 | 2017/05/26 03:00 | Katayama, Sho v Ehara, Hiroyasu | 3-6,6-4,2-6 |
| ITF Singapore F1 | 2017/05/25 02:00 | Katayama, Sho v Shaheed Alam | 6-7,6-4,6-0 |
| ITF Singapore F1 | 2017/05/23 04:20 | Sidharth Rawat v Katayama, Sho | 4-6,2-6 |
| ITF Japan F5 | 2017/04/07 07:10 | Yusuke Takahashi v Katayama, Sho | 6-1,7-5 |
| ITF Japan F5 | 2017/04/06 04:10 | Toshihide Matsui v Katayama, Sho | 1-6,2-6 |
| ITF Japan F5 | 2017/04/04 02:40 | Masaya Kobayashi v Katayama, Sho | 1-6,2-6 |