Ground: Hardcourt outdoor
| ITF Japan F4 | 2014/04/02 01:00 | Shunrou Takeshima v Katsuki Nagao | 6-4,6-4 |
| ITF Thailand F9 | 2015/04/19 03:00 | Katsuki Nagao v Sonchat Ratiwatana | 6-3,6-3 |
| ITF Thailand F9 | 2015/04/18 04:00 | Katsuki Nagao v Jatuporn Nalamphun | 6-0,6-2 |
| ITF Japan F3 | 2015/03/22 01:00 | Yuki Nakamura v Katsuki Nagao | 7-6,6-0 |
| ITF Japan F2 | 2015/03/18 02:55 | Duckhee Lee v Katsuki Nagao | 6-3,7-5 |
| ITF Japan F2 | 2015/03/16 01:00 | Chih-Jen Ho v Katsuki Nagao | 4-6,4-6 |
| ITF Japan F1 | 2015/03/10 03:50 | Katsuki Nagao v Duckhee Lee | 2-6,3-6 |
| ITF Turkey F34 | 2014/10/01 08:35 | Marshall Tutu v Katsuki Nagao | 6-3,6-1 |
| ITF Turkey F34 | 2014/09/29 07:00 | Katsuki Nagao v Yvo Panak | 6-3,6-0 |
| ITF Thailand F9 | 2015/04/19 04:00 | Shunrou Takeshima v Kelsey Stevenson | 6-2,6-2 |
| ITF Japan F3 | 2015/03/26 02:35 | Yasutaka Uchiyama v Shunrou Takeshima | 6-3,6-1 |
| ITF Japan F3 | 2015/03/24 01:00 | Shunrou Takeshima v Ben Mclachlan | 6-2,6-0 |
| ITF Japan F3 | 2015/03/23 01:00 | Chih-Jen Ho v Shunrou Takeshima | 1-6,6-7 |
| ITF Japan F2 | 2015/03/15 01:00 | Shunrou Takeshima v Su Hao Zhong | 6-3,6-1 |
| ITF Japan F1 | 2015/03/11 03:05 | Shunrou Takeshima v Pietro Licciardi | 3-6,3-6 |
| ITF Japan F1 | 2015/03/09 00:40 | Shunrou Takeshima v Ken Onoda | 6-1,6-1 |
| ITF Japan F1 | 2015/03/08 01:00 | Shunrou Takeshima v Kaito Itsusaki | 6-2,6-4 |