Round: 44 Ground: Hardcourt outdoor
| ITF Japan F8 | 2014/06/24 01:00 | Keisuke Watanuki v Masato Shiga | 6-4,6-2 |
| ITF Japan F2 | 2014/03/17 03:10 | Keisuke Watanuki v Masato Shiga | 6-7,4-6 |
| ITF Japan F2 | 2016/03/12 02:00 | Masato Shiga v Ryota Kishi | 4-6,1-6 |
| ITF China F3 | 2016/02/29 04:30 | Masato Shiga v Yecong He | 5-7,1-6 |
| ITF China F2 | 2016/02/23 02:00 | Masato Shiga v Young Seok Kim | 4-6,3-6 |
| ITF USA F5 | 2016/01/22 19:00 | Masato Shiga v Trent Bryde | 3-6,3-6 |
| ITF USA F4 | 2016/01/17 16:00 | Masato Shiga v Roberto Quiroz | 2-6,2-6 |
| ITF USA F4 | 2016/01/15 15:00 | Masato Shiga v Kevin Gardner | 6-1,6-1 |
| ITF Chinese Taipei F1 | 2015/08/20 03:30 | Masato Shiga v Issei Okamura | 4-6,4-6 |
| ITF China F13 | 2015/08/14 02:00 | Masato Shiga v Di Wu | 0-6,6-7 |
| 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 F1 | 2016/03/10 02:35 | Takuto Niki v Keisuke Watanuki | 7-5,6-2 |
| ITF Japan F1 | 2016/03/07 01:00 | Keisuke Watanuki v Kazuma Kawachi | 6-1,6-1 |
| ITF Japan F1 | 2016/03/06 03:00 | Keisuke Watanuki v Sora Fukuda | 6-1,3-6,6-3 |
| ITF Japan F1 | 2016/03/05 03:00 | Keisuke Watanuki v Yuichiro Inui | 6-2,6-3 |