Ground: Hardcourt outdoor
| ITF Japan F3 | 2015/03/21 02:30 | Oku, Hiromasa v Kaito Uesugi | 6-4,6-4 |
| ITF Japan F2 | 2015/03/16 01:00 | Matsuzaki, Yutaro v Oku, Hiromasa | 6-2,3-6,7-6 |
| ITF Japan F1 | 2015/03/10 01:00 | Ito, Yuichi v Oku, Hiromasa | 6-2,6-4 |
| ITF Hong Kong F2 | 2014/07/14 03:30 | Kikuchi, Gengo v Oku, Hiromasa | 6-7,6-4,6-2 |
| ITF Japan F8 | 2014/06/26 03:30 | Oku, Hiromasa v Yoshihito Nishioka | 0-6,3-6 |
| ITF Japan F8 | 2014/06/25 01:00 | Moritani, Soichiro v Oku, Hiromasa | 3-6,3-6 |
| ITF Japan F7 | 2014/06/22 06:40 | Kibi, Yuya v Oku, Hiromasa | 6-4,6-3 |
| ITF Japan F7 | 2014/06/21 03:20 | Ono, Yohei v Oku, Hiromasa | 2-6,4-6 |
| ITF Japan F2 | 2015/03/20 03:00 | Niki, Takuto v Sasai, Masaki | 7-5,6-3 |
| ITF Japan F2 | 2015/03/17 04:10 | Sasai, Masaki v Onozawa, Arata | 6-4,6-4 |
| ITF Japan F2 | 2015/03/15 01:00 | Sasai, Masaki v Issei Okamura | 6-3,6-0 |
| ITF Japan F1 | 2015/03/12 01:00 | Niki, Takuto v Sasai, Masaki | 6-2,6-1 |
| ITF Japan F1 | 2015/03/10 01:00 | Sasai, Masaki v Moritani, Soichiro | 6-1,7-5 |
| ITF Japan F8 | 2014/06/26 04:35 | Sasai, Masaki v Watanuki, Keisuke | 3-6,1-6 |
| ITF Japan F8 | 2014/06/25 01:00 | Niki, Takuto v Sasai, Masaki | 3-6,1-6 |
| ITF Japan F8 | 2014/06/22 03:00 | Sasai, Masaki v Habusawa, Tetsuro | 6-1,6-0 |