Round: 62 Ground: Hardcourt outdoor
| ITF Japan F4 | 2017/03/27 01:00 | Masaya Kobayashi v Aoran Wang | 7-6,7-6 |
| ITF Japan F3 | 2017/03/20 01:00 | Masaya Kobayashi v Chan-Yeong Oh | 4-6,2-6 |
| ITF Japan F3 | 2017/03/19 01:00 | Masaya Kobayashi v Yunosuke Tanaka | 5-7,6-2,6-1 |
| ITF Japan F3 | 2017/03/18 08:00 | Masaya Kobayashi v Yuta Kawahashi | 6-2,7-5 |
| ITF Japan F3 | 2017/03/18 03:00 | Masaya Kobayashi v Masaki Osafune | 7-6,6-7,6-4 |
| ITF Japan F2 | 2017/03/14 02:30 | Masaya Kobayashi v Xin Gao | 4-6,2-6 |
| ITF Japan F1 | 2017/03/09 03:40 | Masaya Kobayashi v Wishaya Trongcharoenchaikul | 0-6,3-6 |
| ITF Japan F1 | 2017/03/08 01:00 | Masaya Kobayashi v Soichiro Moritani | 6-3,6-4 |
| ITF Japan F4 | 2017/03/27 01:00 | Yuga Tashiro v Keisuke Watanuki | 2-6,6-7 |
| ITF Japan F4 | 2017/03/25 03:00 | Yu Chang v Keisuke Watanuki | 7-6,3-6,4-6 |
| ITF Japan F2 | 2017/03/14 04:20 | Yusuke Takahashi v Keisuke Watanuki | 6-2,6-2 |
| ITF Japan F2 | 2017/03/13 01:00 | Kittiphong Wachiramanowong v Keisuke Watanuki | 4-6,6-7 |
| ITF Japan F2 | 2017/03/12 02:00 | Keisuke Watanuki v Shinta Fujii | 6-2,2-6,6-2 |
| 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 |