Round: 25 Ground: Synthetic outdoor
| ITF Japan F7 Qual | 2016/06/05 01:00 | Shunrou Takeshima v Ryotaro Matsumura | 5-7,1-6 |
| ITF Japan F7 Qual | 2016/06/04 01:00 | David Barclay v Ryotaro Matsumura | 1-6,2-6 |
| ITF Japan F5 | 2015/06/03 06:30 | Ryotaro Matsumura v Keisuke Watanuki | 6-2,4-6,0-6 |
| ITF Japan F5 | 2015/06/01 02:30 | Ryotaro Matsumura v Soichiro Moritani | 6-2,6-4 |
| ITF Japan F5 | 2015/05/30 01:00 | Ryotaro Matsumura v Shinta Fujii | 6-3,6-1 |
| ITF Japan F4 | 2015/04/01 01:00 | Ryotaro Matsumura v Shuichi Sekiguchi | 2-6,4-6 |
| ITF Japan F4 | 2015/03/31 03:50 | Masaki Sasai v Ryotaro Matsumura | 2-6,2-6 |
| ITF Japan F4 | 2015/03/30 01:00 | Ryotaro Matsumura v Yutaro Matsuzaki | 6-4,6-3 |
| ITF Japan F6 | 2016/05/31 01:00 | Sho Katayama v Katsuki Nagao | 3-6,6-4,6-3 |
| 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 |