Ground: Hardcourt outdoor
| ITF Guam F1 | 2015/05/27 00:00 | Hiromasa Oku v Masayoshi Ono | 6-0,6-2 |
| ITF Guam F1 | 2015/05/26 00:00 | Hiromasa Oku v Masaki Sasai | 6-1,6-1 |
| ITF Thailand F9 | 2015/04/28 03:00 | Yuichi Ito v Hiromasa Oku | 6-4,2-6,4-6 |
| ITF Thailand F9 | 2015/04/22 07:50 | Hiromasa Oku v Yong-Kyu Lim | 3-6,1-6 |
| ITF Thailand F9 | 2015/04/20 03:00 | Jacob Grills v Hiromasa Oku | 6-2,3-6,1-6 |
| ITF Japan F3 | 2015/03/21 02:30 | Hiromasa Oku v Kaito Uesugi | 6-4,6-4 |
| 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 Guam F1 | 2015/05/27 00:00 | Takao Suzuki v Ben Mclachlan | 3-6,6-3,6-2 |
| ITF Chinese Taipei F1 Qual | 2014/08/17 02:00 | Takao Suzuki v Tung-Lin Wu | 4-6,3-6 |
| ITF Hong Kong F3 | 2014/07/21 02:00 | Peter Kobelt v Takao Suzuki | 6-3,6-2 |
| ITF Japan F8 | 2014/06/26 01:00 | Takao Suzuki v Sho Katayama | 5-7,0-6 |
| ITF Japan F8 | 2014/06/24 04:10 | Yuichi Ito v Takao Suzuki | 3-6,2-6 |
| ITF Japan F6 | 2014/06/13 00:00 | Takao Suzuki v Sho Katayama | 7-6,2-6,7-6 |
| ITF Japan F6 | 2014/06/11 02:05 | Masato Shiga v Takao Suzuki | 1-6,2-6 |
| ITF Thailand F10 | 2014/05/27 03:15 | Dayne Kelly v Takao Suzuki | 4-6,7-6,6-1 |