Round: 62 Ground: Hardcourt outdoor
| ITF Japan F3 | 2017/03/18 05:00 | Masamichi Imamura v Takuya Kumasaka | 7-6,7-5 |
| Yokohama, Japan, Qualifying | 2017/02/25 06:25 | Ehara, Hiroyasu v Masamichi Imamura | 6-3,6-4 |
| ITF Japan F3 | 2017/03/18 05:00 | Tagata, Ryohei v Nagao, Katsuki | 3-6,3-6 |
| ITF Japan F1 | 2017/03/06 01:00 | Nagao, Katsuki v Sho Shimabukuro | 3-6,6-7 |
| ITF Japan F1 | 2017/03/05 01:00 | Nagao, Katsuki v Yuichiro Inui | 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 | Makoto Ochi v Nagao, Katsuki | 6-3,6-2 |
| ITF Korea F7 | 2016/08/30 01:30 | Nagao, Katsuki v Choi, Jae-Won | 6-3,7-6 |
| ITF Korea F8 | 2016/08/23 04:15 | Jae Hwan Kim v Nagao, Katsuki | 6-3,6-2 |