Ground: Hardcourt outdoor
| ITF Guam F1 | 2015/05/29 00:00 | Hiromasa Oku v Takao Suzuki | 6-4,6-7,5-7 |
| ITF Guam F1 | 2015/05/27 00:00 | Takao Suzuki v Ben Mclachlan | 3-6,6-3,6-2 |
| ITF Chinese Taipei F1 Qual | 2014/08/17 02:00 | Takao Suzuki v Tung-Lin Wu | 4-6,3-6 |
| ITF Hong Kong F3 | 2014/07/21 02:00 | Peter Kobelt v Takao Suzuki | 6-3,6-2 |
| ITF Japan F8 | 2014/06/26 01:00 | Takao Suzuki v Sho Katayama | 5-7,0-6 |
| ITF Japan F8 | 2014/06/24 04:10 | Yuichi Ito v Takao Suzuki | 3-6,2-6 |
| ITF Japan F6 | 2014/06/13 00:00 | Takao Suzuki v Sho Katayama | 7-6,2-6,7-6 |
| ITF Japan F6 | 2014/06/11 02:05 | Masato Shiga v Takao Suzuki | 1-6,2-6 |
| 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 |
| 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 |