Round: 25 Ground: Hardcourt outdoor
| ITF Japan F6 | 2014/06/13 02:50 | Shunrou Takeshima v Hiromasa Oku | 1-6,0-6 |
| ITF Turkey F19 | 2016/05/13 09:20 | Marc Sieber v Hiromasa Oku | 6-0,6-3 |
| ITF Turkey F19 | 2016/05/11 13:00 | Hiromasa Oku v Thomas Statzberger | 6-3,6-4 |
| ITF Turkey F18 | 2016/05/04 08:00 | Hiromasa Oku v Anil Yuksel | 3-6,2-6 |
| ITF Turkey F17 | 2016/04/26 11:20 | Altug Celikbilek v Hiromasa Oku | 6-4,2-6,7-6 |
| ITF Japan F5 | 2016/04/08 01:00 | Hiromasa Oku v Yuya Kibi | 2-6,4-6 |
| ITF Japan F5 | 2016/04/05 07:45 | Hiromasa Oku v Katsuki Nagao | 7-6,5-7,6-1 |
| ITF Japan F4 | 2016/03/30 03:25 | Masato Shiga v Hiromasa Oku | 6-4,6-3 |
| ITF Japan F3 | 2016/03/20 01:00 | Hiromasa Oku v Gengo Kikuchi | 2-6,1-6 |
| ITF Guam F1 | 2016/05/22 01:00 | Shunrou Takeshima v Takahiro Kubo | 6-1,6-1 |
| ITF China F6 Qual | 2016/05/07 03:30 | Changwei Peng v Shunrou Takeshima | 2-6,7-5,6-2 |
| ITF Japan F5 | 2016/04/06 04:30 | Shunrou Takeshima v Ryota Kishi | 6-4,1-6,2-6 |
| ITF Japan F5 | 2016/04/04 00:30 | Shunrou Takeshima v Yuga Tashiro | 6-1,6-2 |
| ITF Japan F4 | 2016/03/27 01:00 | Rigele Te v Shunrou Takeshima | 7-5,6-2 |
| ITF Japan F2 | 2016/03/13 01:00 | Shunrou Takeshima v Yusuke Takahashi | 1-6,3-6 |
| ITF Japan F2 | 2016/03/12 00:30 | Ryota Tanuma v Shunrou Takeshima | 3-6,0-6 |
| ITF Japan F1 | 2016/03/06 01:00 | Li-Wei Tan v Shunrou Takeshima | 1-6,1-6 |