Ground: Hardcourt outdoor
| ITF Japan F2 | 2015/03/16 01:00 | Yutaro Matsuzaki v Hiromasa Oku | 6-2,3-6,7-6 |
| ITF Japan F1 | 2015/03/10 01:00 | Yuichi Ito v Hiromasa Oku | 6-2,6-4 |
| ITF Hong Kong F2 | 2014/07/14 03:30 | Gengo Kikuchi v Hiromasa Oku | 6-7,6-4,6-2 |
| ITF Japan F8 | 2014/06/26 03:30 | Hiromasa Oku v Yoshihito Nishioka | 0-6,3-6 |
| ITF Japan F8 | 2014/06/25 01:00 | Soichiro Moritani v Hiromasa Oku | 3-6,3-6 |
| ITF Japan F7 | 2014/06/22 06:40 | Yuya Kibi v Hiromasa Oku | 6-4,6-3 |
| ITF Japan F7 | 2014/06/21 03:20 | Yohei Ono v Hiromasa Oku | 2-6,4-6 |
| ITF Japan F6 | 2014/06/14 02:00 | Hiromasa Oku v Yuya Kibi | 0-6,2-6 |
| ITF Japan F2 | 2015/03/19 03:00 | Makoto Ochi v Kaito Uesugi | 5-7,6-4,7-6 |
| ITF Japan F2 | 2015/03/15 02:00 | Ryota Kishi v Kaito Uesugi | 1-6,6-4,2-6 |
| ITF Japan F2 | 2015/03/14 00:30 | Keisuke Numajiri v Kaito Uesugi | 4-6,6-2,2-6 |
| ITF Japan F4 | 2014/04/04 01:00 | Kaito Uesugi v Duckhee Lee | 2-6,5-7 |
| ITF Japan F4 | 2014/04/02 03:20 | Sho Katayama v Kaito Uesugi | 6-2,5-7,4-6 |