Round: 44 Ground: Hardcourt outdoor
| ITF Japan F3 | 2016/03/19 03:45 | Wachiramanowong, Kittipong v Ito, Yuya | 6-7,3-6 |
| ITF Japan F3 | 2016/03/19 00:30 | Ito, Yuya v Ono, Masayoshi | 6-1,6-1 |
| ITF Japan F3 | 2016/03/19 03:45 | Kishi, Ryota v Nagao, Katsuki | 1-6,5-7 |
| ITF Japan F2 | 2016/03/15 01:00 | Nagao, Katsuki v Kondo, Hiroki | 6-7,0-6 |
| ITF Japan F2 | 2016/03/13 01:00 | Nagao, Katsuki v Onoda, Ken | 6-3,5-7,6-4 |
| ITF Japan F1 | 2016/03/10 02:45 | Nagao, Katsuki v Watanuki, Yusuke | 1-6,6-2,1-6 |
| ITF Japan F1 | 2016/03/07 01:00 | Nagao, Katsuki v Moritani, Soichiro | 6-4,7-6 |
| ITF Japan F1 | 2016/03/05 01:00 | Nagao, Katsuki v Masaya Kobayashi | 6-2,2-6,6-3 |
| ITF Japan F8 | 2015/06/27 01:00 | Yasutaka Uchiyama v Nagao, Katsuki | 7-6,6-3 |
| ITF Japan F8 | 2015/06/25 04:25 | Ehara, Hiroyasu v Nagao, Katsuki | 4-6,3-6 |