Stadium: Court 3 Round: 54 Ground: Synthetic outdoor
| Challenger Yokohama Qual | 2018/02/24 02:45 | Kengo Sasaki v Teppei Uesugi | 2-6,7-6,6-7 |
| ITF Japan F3 | 2018/03/17 00:30 | Takahiro Kubo v Kousuke Ogura | 0-6,0-6 |
| ITF Portugal F2 Qual | 2018/02/24 12:30 | Takahiro Kubo v Maximiliano R-Mayorga | 2-6,4-6 |
| ITF Portugal F1 | 2018/02/17 10:00 | Takahiro Kubo v Benjamin Niv | 1-6,0-6 |
| ITF Spain F3 | 2018/01/27 14:00 | Takahiro Kubo v Nikita Tatyanin | 1-6,3-6 |
| ITF Spain F2 | 2018/01/20 13:30 | Marc Fornell-Mestres v Takahiro Kubo | 6-0,6-1 |
| ITF Australia F7 Qual | 2017/10/07 04:00 | Takahiro Kubo v Lawrence Bataljin | 2-6,2-6 |
| ITF Australia F6 | 2017/09/30 01:30 | Takahiro Kubo v Cameron Edward Smith | 3-6,0-6 |
| ITF Australia F5 Qual | 2017/09/23 01:30 | Darren Polkinghorne v Takahiro Kubo | 6-1,6-2 |