| ITF Korea F7 | 2016/08/31 04:35 | Макото Очи v Katsuki Nagao | 6-3,6-2 |
| ITF Korea F7 | 2016/08/30 01:30 | Katsuki Nagao v Jae-Won Choi | 6-3,7-6 |
| ITF Korea F8 | 2016/08/23 04:15 | Жае Хван Ким v Katsuki Nagao | 6-3,6-2 |
| ITF Japan F8 | 2016/06/16 01:00 | Юки Мочизуки v Katsuki Nagao | 6-1,6-0 |
| ITF Japan F8 | 2016/06/14 03:00 | Katsuki Nagao v Yuichi Ito | 6-2,6-4 |
| ITF Japan F7 | 2016/06/08 01:00 | Katsuki Nagao v Кенто Такеучи | 4-6,1-6 |
| ITF Japan F7 | 2016/06/07 01:00 | Ротаро Мацумура v Katsuki Nagao | 4-6,4-6 |
| ITF Japan F6 | 2016/05/31 01:00 | Шо Катаяма v Katsuki Nagao | 3-6,6-4,6-3 |
| ITF Korea F8 | 2016/09/04 02:00 | Keisuke Numajiri v Gwang Hyeon Cho | 6-1,6-4 |
| ITF Korea F8 | 2016/08/28 02:00 | Keisuke Numajiri v Woo Hyeok Jang | 3-6,1-6 |
| ITF Spain F26 Qual | 2016/08/14 08:30 | Keisuke Numajiri v Aitor S Llopis | 2-6,4-6 |
| ITF Spain F25 | 2016/08/09 10:00 | Бенджамин Бонзи v Keisuke Numajiri | 6-0,6-4 |
| ITF Spain F24 | 2016/08/03 20:15 | Sebastien Boltz v Keisuke Numajiri | 6-2,7-5 |
| ITF Spain F24 | 2016/08/01 09:00 | Keisuke Numajiri v Борис Ариас | 6-4,7-6 |
| ITF Spain F24 | 2016/07/31 14:00 | Keisuke Numajiri v Miguel Vallejo | 6-2,6-2 |
| ITF Macedonia F2 | 2016/06/28 07:30 | Alexander Lazov v Keisuke Numajiri | 6-1,6-0 |