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