Round: 62 Ground: Hardcourt outdoor
| ITF Japan F1 | 2017/03/04 01:00 | Tagata, Ryohei v Uesugi, Teppei | 6-1,1-6,3-6 |
| 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 |
| ITF Japan F8 | 2016/06/16 01:00 | Yuki Mochizuki v Nagao, Katsuki | 6-1,6-0 |