Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| ITF - M15 Karuizawa | 2019/05/27 04:00 | Taketo Takamisawa v Takahiro Kubo | 6-1,6-1 |
| ITF Japan F8 | 2018/06/09 01:00 | Takahiro Kubo v Kousuke Ogura | 0-6,3-6 |
| ITF Japan F7 Qual | 2018/06/02 01:00 | Kengo Sasaki v Takahiro Kubo | 6-1,6-1 |
| 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 Korea F6 | 2018/08/26 03:00 | Sung Jun Park v Seungri Choi | 6-1,5-7,2-6 |
| ITF Korea F6 | 2018/08/25 04:30 | Seungri Choi v Seung Heon Hong | 6-2,6-4 |
| ITF Korea F5 | 2018/08/19 02:00 | Seong Taek Im v Seungri Choi | 6-3,6-2 |
| ITF Korea F5 | 2018/08/18 03:00 | Seungri Choi v Hyun Sik Go | 6-4,7-5 |
| ITF Korea F3 Qual | 2018/06/18 03:30 | Seungri Choi v Ilsang Yoon | 3-6,2-6 |
| ITF Korea F2 | 2018/06/09 01:00 | Jaeheon Yoon v Seungri Choi | 6-1,7-5 |
| ITF Korea F1 | 2018/06/02 01:00 | Hyeong Jin Cho v Seungri Choi | 6-2,6-4 |
| Challenger Gwangju Qual | 2017/09/16 02:55 | Seungri Choi v Miliaan Niesten | 2-6,4-6 |