Round: 26 Ground: Synthetic outdoor
| ITF Japan F7 | 2016/06/07 01:00 | 마츠무라, 리오타로 v Nagao, Katsuki | 4-6,4-6 |
| ITF Japan F6 | 2016/05/31 01:00 | 카타야마, 쇼 v Nagao, Katsuki | 3-6,6-4,6-3 |
| ITF Guam F1 | 2016/05/23 00:00 | Nagao, Katsuki v Kibi, Yuya | 6-7,4-6 |
| ITF Turkey F19 | 2016/05/11 09:40 | Nagao, Katsuki v 야마시타, 페르난도 | 1-6,1-6 |
| ITF Turkey F18 | 2016/05/06 08:00 | Nagao, Katsuki v Sieber, Marc | 3-6,6-4,2-6 |
| ITF Turkey F18 | 2016/05/03 11:50 | 니에스텐, 밀리안 v Nagao, Katsuki | 4-6,3-6 |
| Turkey F17, Singles Qualifying | 2016/04/26 11:20 | Nagao, Katsuki v Sieber, Marc | 2-6,1-6 |
| ITF Japan F5 | 2016/04/05 07:45 | Oku, Hiromasa v Nagao, Katsuki | 7-6,5-7,6-1 |
| ITF Japan F7 | 2016/06/06 02:50 | 오카무라, 이세이 v Takeuchi, Kento (1987) | 2-6,3-6 |
| ITF Japan F6 | 2016/06/01 01:00 | Takeuchi, Kento (1987) v 이토, 유이치 | 4-6,3-6 |
| ITF Japan F6 | 2016/05/31 04:25 | Takeuchi, Kento (1987) v 타누마, 리요타 | 6-3,3-6,6-2 |
| ITF China F8 | 2016/05/24 06:35 | Takeuchi, Kento (1987) v 볼치엘 H, 하리 | 6-7,4-6 |
| ITF China F5 | 2016/04/12 02:00 | Takeuchi, Kento (1987) v 테, 리겔 | 1-6,1-6 |
| ITF Japan F5 | 2016/04/08 02:30 | 와타누키, 요스케 v Takeuchi, Kento (1987) | 6-1,6-2 |
| ITF Japan F5 | 2016/04/05 02:00 | 리, 호앙 남 v Takeuchi, Kento (1987) | 4-6,6-7 |
| ITF Japan F4 | 2016/03/31 01:00 | 이마이, 신타로 v Takeuchi, Kento (1987) | 6-1,6-3 |