| ITF Hong Kong F2 | 06/26 02:00 | 25 | Masato Shiga v Katsuki Nagao | 6-2,6-2 | |
| ITF Hong Kong F2 Qual | 06/25 02:00 | 54 | Katsuki Nagao v Leo Julien Sebaoun | 6-2,6-1 | |
| ITF Hong Kong F2 Qual | 06/24 04:30 | 54 | Katsuki Nagao v David Barclay | 6-4,6-2 | |
| ITF Hong Kong F1 | 06/22 03:00 | 27 | Katsuki Nagao v Джумпей Ямазаки | 3-6,1-6 | |
| ITF Hong Kong F1 | 06/21 11:15 | 26 | Франсис Кейси Алкантара v Katsuki Nagao | Retired | |
| ITF Hong Kong F1 | 06/21 07:00 | 25 | Йе Цонг Мо v Katsuki Nagao | 2-6,4-6 | |
| ITF Japan F8 | 06/15 03:30 | 26 | Генджо Кикучи v Katsuki Nagao | 6-2,6-2 | |
| ITF Japan F8 | 06/14 03:00 | 25 | Katsuki Nagao v Тайсей Ичикауа | 6-0,6-1 | |
| ITF Japan F7 | 06/03 01:00 | 54 | Katsuki Nagao v Римпеи Каваками | 6-7,6-7 | |
| ITF Japan F5 | 04/04 04:40 | 25 | [188] Татсума Ито v Katsuki Nagao [468] | 7-6,6-4 | |
| ITF Japan F5 | 04/01 02:00 | 54 | Katsuki Nagao v Казуки Шимицу | 6-3,6-3 | |
| ITF Japan F4 | 03/28 01:00 | 62 | Katsuki Nagao v Shunrou Takeshima | 2-6,2-6 | |
| ITF Japan F4 | 03/26 00:59 | 62 | Katsuki Nagao v Nasa Hatakeyama | 6-2,6-3 | |
| ITF Japan F4 | 03/25 01:00 | 62 | Katsuki Nagao v Ryohei Tagata | 2-6,6-2,6-0 | |
| ITF Japan F3 | 03/19 01:00 | 62 | Лий Джеа-мун v Katsuki Nagao | 7-6,6-4 | |
| ITF Japan F3 | 03/18 08:00 | 62 | Масамичи Имамура v Katsuki Nagao | 2-6,1-6 | |
| ITF Japan F3 | 03/18 05:00 | 62 | Ryohei Tagata v Katsuki Nagao | 3-6,3-6 | |
| ITF Japan F1 | 03/06 01:00 | 62 | Katsuki Nagao v Шо Шимабукуро | 3-6,6-7 | |
| ITF Japan F1 | 03/05 01:00 | 62 | Katsuki Nagao v Юичиро Инуи | 6-3,6-2 | |
| ITF Japan F1 | 03/04 03:30 | 62 | Katsuki Nagao v Leo Julien Sebaoun | 2-6,6-3,6-3 | |
| ITF Korea F8 | 09/06 04:00 | 25 | Katsuki Nagao v Keisuke Numajiri | 6-3,4-6,0-6 | |
| ITF Korea F7 | 08/31 04:35 | 26 | Макото Очи v Katsuki Nagao | 6-3,6-2 | |
| ITF Korea F7 | 08/30 01:30 | 25 | Katsuki Nagao v Jae-Won Choi | 6-3,7-6 | |
| ITF Korea F8 | 08/23 04:15 | 25 | Жае Хван Ким v Katsuki Nagao | 6-3,6-2 | |
| ITF Japan F8 | 06/16 01:00 | 26 | Юки Мочизуки v Katsuki Nagao | 6-1,6-0 | |
| ITF Japan F8 | 06/14 03:00 | 25 | Katsuki Nagao v Yuichi Ito | 6-2,6-4 | |
| ITF Japan F7 | 06/08 01:00 | 26 | Katsuki Nagao v Кенто Такеучи | 4-6,1-6 | |
| ITF Japan F7 | 06/07 01:00 | 25 | Ротаро Мацумура v Katsuki Nagao | 4-6,4-6 | |
| ITF Japan F6 | 05/31 01:00 | 25 | Шо Катаяма v Katsuki Nagao | 3-6,6-4,6-3 | |
| ITF Guam F1 | 05/23 00:00 | 25 | Katsuki Nagao v Yuya Kibi | 6-7,4-6 |