Round: 25 Ground: Hardcourt outdoor
| ITF Japan F4 | 2016/03/28 01:00 | Gengo Kikuchi v Keisuke Watanuki | 2-6,7-5,6-7 |
| ITF Japan F4 | 2016/03/27 01:00 | Yusuke Takahashi v Keisuke Watanuki | 4-6,3-6 |
| ITF Japan F3 | 2016/03/22 03:10 | Ken Onishi v Keisuke Watanuki | 2-6,6-2,7-5 |
| ITF Japan F3 | 2016/03/20 02:30 | Masato Shiga v Keisuke Watanuki | 4-6,6-2,3-6 |
| ITF Japan F3 | 2016/03/19 03:45 | Rigele Te v Keisuke Watanuki | 2-6,1-6 |
| ITF Japan F2 | 2016/03/15 04:30 | Keisuke Watanuki v Yuya Kibi | 2-6,6-4,1-6 |
| ITF Japan F2 | 2016/03/13 01:00 | Aoran Wang v Keisuke Watanuki | 0-6,4-6 |
| ITF Japan F2 | 2016/03/12 00:30 | Keisuke Numajiri v Keisuke Watanuki | 6-2,2-6,1-6 |
| ITF Japan F4 | 2016/03/28 01:00 | Shintaro Imai v Masaki Sasai | 6-2,6-0 |
| ITF Japan F4 | 2016/03/27 03:00 | Shintaro Imai v Yuga Tashiro | 6-1,6-1 |
| ITF Japan F3 | 2016/03/24 03:15 | Shintaro Imai v Xin Gao | 6-7,3-6 |
| ITF Japan F3 | 2016/03/23 01:00 | Yecong He v Shintaro Imai | 6-7,6-3,1-6 |
| ITF Japan F3 | 2016/03/21 02:45 | Shintaro Imai v Sidharth Rawat | 6-2,6-0 |
| ITF Japan F2 | 2016/03/18 02:45 | Shintaro Imai v Yuya Kibi | 7-6,4-6,3-6 |
| ITF Japan F2 | 2016/03/16 01:00 | Kento Takeuchi v Shintaro Imai | 0-6,4-6 |
| ITF Japan F2 | 2016/03/14 02:40 | Shintaro Imai v Ko Suzuki | 6-3,6-0 |