| ITF Japan F5 | 06/03 02:30 | - | Такаши Саито v Hiromasa Oku | 2-6,4-6 | |
| ITF Korea F1 Qual | 04/29 00:30 | - | Jung-Woong Na v Hiromasa Oku | 6-3,6-4 | |
| ITF Japan F3 | 03/24 01:00 | - | Hiromasa Oku v Yutaro Matsuzaki | 2-6,4-6 | |
| ITF Japan F2 | 03/18 01:00 | - | Hiromasa Oku v Такуто Ники | 6-7,3-6 | |
| ITF Japan F1 | 03/11 01:00 | - | Hiroka Kondo v Hiromasa Oku | 7-5,6-3 |