Round: 62 Ground: Hardcourt outdoor
| ITF Japan F3 | 2017/03/18 05:00 | 타가타, 리오헤이 v Nagao, Katsuki | 3-6,3-6 |
| ITF Japan F3 | 2017/03/19 01:00 | Jeamoon Lee v Nagao, Katsuki | 7-6,6-4 |
| ITF Japan F3 | 2017/03/18 08:00 | Imamura, Masamichi v Nagao, Katsuki | 2-6,1-6 |
| ITF Japan F3 | 2017/03/18 05:00 | 타가타, 리오헤이 v Nagao, Katsuki | 3-6,3-6 |
| ITF Japan F1 | 2017/03/06 01:00 | Nagao, Katsuki v 시마부쿠로, 소 | 3-6,6-7 |
| ITF Japan F1 | 2017/03/05 01:00 | Nagao, Katsuki v 이누이, 유이치로 | 6-3,6-2 |
| ITF Japan F1 | 2017/03/04 03:30 | Nagao, Katsuki v Sebaoun, Leo Julien | 2-6,6-3,6-3 |
| ITF Korea F8 | 2016/09/06 04:00 | Nagao, Katsuki v Numajiri, Keisuke | 6-3,4-6,0-6 |
| ITF Korea F7 | 2016/08/31 04:35 | 오치, 마코토 v Nagao, Katsuki | 6-3,6-2 |
| ITF Japan F3 | 2017/03/18 05:00 | 타가타, 리오헤이 v Nagao, Katsuki | 3-6,3-6 |
| ITF Japan F1 | 2017/03/04 01:00 | 타가타, 리오헤이 v Uesugi, Teppei | 6-1,1-6,3-6 |