Round: 44 Ground: Hardcourt outdoor
| ITF Japan F2 | 2017/03/11 03:00 | Yuta Kawahashi v Keisuke Watanuki | 2-6,2-6 |
| ITF Japan F1 | 2017/03/06 01:00 | Kaito Itsusaki v Keisuke Watanuki | 6-3,6-3 |
| ITF Japan F1 | 2017/03/05 01:00 | Masaki Osafune v Keisuke Watanuki | 6-7,6-0,2-6 |
| ITF Japan F8 | 2016/06/16 02:15 | Keisuke Watanuki v Sho Katayama | 3-6,1-6 |
| ITF Japan F8 | 2016/06/15 04:30 | Shunrou Takeshima v Keisuke Watanuki | 6-7,0-6 |
| ITF Japan F7 | 2016/06/09 02:30 | Chan-Yeong Oh v Keisuke Watanuki | 6-3,6-7,6-4 |
| ITF Japan F7 | 2016/06/07 01:00 | Keisuke Watanuki v Takuto Niki | 6-4,7-6 |
| ITF Japan F6 | 2016/05/31 05:25 | Yusuke Takahashi v Keisuke Watanuki | 6-3,6-4 |
| ITF Japan F1 | 2017/03/08 02:30 | Shinta Fujii v Takuto Niki | 6-7,2-6 |
| ITF Japan F1 | 2017/03/06 01:00 | Yohei Ono v Shinta Fujii | 5-7,5-7 |
| ITF Japan F1 | 2017/03/04 01:00 | Tomohiro Masabayashi v Shinta Fujii | 6-3,2-6,3-6 |
| Challenger Kyoto Qual | 2017/02/18 03:00 | Shuichi Sekiguchi v Shinta Fujii | 6-1,7-5 |
| ITF Indonesia F2 Qual | 2017/02/13 03:15 | Chan-Yeong Oh v Shinta Fujii | 6-3,6-1 |
| ITF Indonesia F2 Qual | 2017/02/12 09:45 | Mochammad Rizky Widianto v Shinta Fujii | 3-6,2-6 |
| ITF Indonesia F1 Qual | 2017/02/06 06:15 | Shinta Fujii v Kazuma Kawachi | 6-3,5-7,1-6 |
| ITF Indonesia F1 Qual | 2017/02/05 09:00 | Shinta Fujii v Jesse Delaney | 6-3,6-4 |