Round: 25 Ground: Hardcourt outdoor
| ITF Japan F6 | 2014/06/13 02:50 | Shunrou Takeshima v Hiromasa Oku | 1-6,0-6 |
| 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 Japan F3 | 2016/03/19 03:45 | Hiromasa Oku v Ko Suzuki | 5-7,7-6,7-5 |
| ITF Japan F2 | 2016/03/13 01:00 | Hiromasa Oku v Shintaro Imai | 1-6,0-6 |
| ITF Japan F2 | 2016/03/12 02:00 | Hiromasa Oku v Yutaro Matsuzaki | 6-4,5-7,6-3 |
| 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 |
| ITF Japan F1 | 2016/03/05 03:00 | Yuki Takamura v Shunrou Takeshima | 6-4,0-6,2-6 |
| ITF Turkey F38 | 2015/09/23 14:40 | Shunrou Takeshima v Ken Onishi | 2-6,2-6 |