Round: 25 Ground: Clay
| ITF Guam F1 | 2016/05/27 00:00 | Deiton Baughman v Sho Katayama | 6-4,6-4 |
| ITF Guam F1 | 2016/05/25 01:35 | Seong-Gook Oh v Sho Katayama | 4-6,1-6 |
| ITF Guam F1 | 2016/05/24 00:00 | Steven Goh v Sho Katayama | 0-6,4-6 |
| ITF India F2 | 2016/05/06 04:30 | Sho Katayama v Sidharth Rawat | 6-2,3-6,3-6 |
| ITF India F2 | 2016/05/05 04:00 | David Agung Susanto v Sho Katayama | 4-6,4-6 |
| ITF India F2 | 2016/05/04 04:00 | Haadin Bava v Sho Katayama | 6-3,5-7,0-6 |
| ITF India F2 | 2016/05/03 09:30 | John Lamble v Sho Katayama | 5-7,0-6 |
| ITF India F1 | 2016/04/29 04:30 | Sho Katayama v Vishnu Vardhan | 1-6,6-7 |
| ITF Guam F1 | 2016/05/23 00:00 | Katsuki Nagao v Yuya Kibi | 6-7,4-6 |
| ITF Turkey F19 | 2016/05/11 09:40 | Katsuki Nagao v Fernando Yamacita | 1-6,1-6 |
| ITF Turkey F18 | 2016/05/06 08:00 | Katsuki Nagao v Marc Sieber | 3-6,6-4,2-6 |
| ITF Turkey F18 | 2016/05/03 11:50 | Miliaan Niesten v Katsuki Nagao | 4-6,3-6 |
| ITF Turkey F17 | 2016/04/26 11:20 | Katsuki Nagao v Marc Sieber | 2-6,1-6 |
| ITF Japan F5 | 2016/04/05 07:45 | Hiromasa Oku v Katsuki Nagao | 7-6,5-7,6-1 |
| ITF Japan F4 | 2016/03/28 01:00 | Katsuki Nagao v Sanhui Shin | 1-6,1-6 |
| ITF Japan F4 | 2016/03/27 01:00 | Katsuki Nagao v Masaki Osafune | 6-1,6-2 |