Ground: Synthetic outdoor
| ITF Japan F7 | 2015/06/17 01:00 | Masaki Sasai v Ryota Tanuma | 1-6,3-6 |
| ITF Japan F6 | 2015/06/11 02:35 | Yusuke Takahashi v Ryota Tanuma | 6-4,6-4 |
| ITF Japan F6 | 2015/06/09 05:00 | Shunrou Takeshima v Ryota Tanuma | 3-6,1-6 |
| ITF Japan F5 | 2015/06/03 06:00 | Ryota Tanuma v Makoto Ochi | 5-7,4-6 |
| ITF Japan F5 | 2015/06/01 04:10 | Issei Okamura v Ryota Tanuma | 6-7,4-6 |
| ITF USA F14 | 2015/04/29 14:30 | Ryota Tanuma v Ryan Haviland | 2-6,3-6 |
| ITF Japan F4 | 2015/04/01 03:00 | Yasutaka Uchiyama v Ryota Tanuma | 6-4,6-2 |
| ITF Japan F4 | 2015/03/31 01:00 | Masato Shiga v Ryota Tanuma | 6-3,4-6,2-6 |
| ITF Japan F7 | 2015/06/17 01:00 | Shunrou Takeshima v Katsuki Nagao | 6-7,3-6 |
| ITF Japan F6 | 2015/06/10 01:30 | Yosuke Watanuki v Katsuki Nagao | 7-6,6-7,6-4 |
| ITF Japan F5 | 2015/06/02 01:00 | Ben Mclachlan v Katsuki Nagao | 6-1,6-2 |
| ITF Guam F1 | 2015/05/30 02:20 | Takao Suzuki v Katsuki Nagao | 2-6,6-4,6-2 |
| ITF Guam F1 | 2015/05/29 01:40 | Katsuki Nagao v Brendan Moore | 2-6,6-4,6-2 |
| ITF Guam F1 | 2015/05/25 01:00 | Katsuki Nagao v Olly Sadler | 6-4,6-4 |
| ITF Thailand F9 | 2015/04/25 04:00 | Katsuki Nagao v Zach Itzstein | 5-7,3-6 |
| ITF Thailand F9 | 2015/04/20 04:00 | Katsuki Nagao v Shunrou Takeshima | 4-6,5-7 |