Round: 25 Ground: Hardcourt outdoor
| ITF Japan F6 | 2016/05/31 05:25 | Yusuke Takahashi v Watanuki, Keisuke | 6-3,6-4 |
| ITF Japan F4 | 2016/03/27 01:00 | Yusuke Takahashi v Watanuki, Keisuke | 4-6,3-6 |
| ITF Japan F1 | 2017/03/12 02:00 | Yusuke Takahashi v Niki, Takuto | 7-5,6-3 |
| ITF Japan F1 | 2017/03/11 01:00 | Wishaya Trongcharoenchaikul v Yusuke Takahashi | 4-6,2-6 |
| ITF Japan F1 | 2017/03/10 01:00 | Yusuke Takahashi v Katayama, Sho | 6-3,6-4 |
| ITF Japan F1 | 2017/03/09 01:00 | Yusuke Takahashi v Yuki Mochizuki | 4-6,6-4,6-1 |
| ITF Japan F1 | 2017/03/07 01:00 | Yusuke Takahashi v Yoshida, Shin | 6-2,6-1 |
| Yokohama, Japan, Qualifying | 2017/02/25 01:00 | Yusuke Takahashi v Sekiguchi, Shuichi | 6-4,3-6,2-6 |
| Challenger Kyoto Qual | 2017/02/18 07:35 | Onozawa, Arata v Yusuke Takahashi | 6-3,6-7,6-3 |
| ITF USA F6 | 2017/02/02 15:00 | Yusuke Takahashi v Naoki Nakagawa | 6-7,3-6 |
| ITF Japan F2 | 2017/03/13 01:00 | Wachiramanowong, Kittipong v Watanuki, Keisuke | 4-6,6-7 |
| ITF Japan F2 | 2017/03/12 02:00 | Watanuki, Keisuke v Fujii, Shinta | 6-2,2-6,6-2 |
| ITF Japan F2 | 2017/03/11 03:00 | Kawahashi, Yuta v Watanuki, Keisuke | 2-6,2-6 |
| ITF Japan F1 | 2017/03/06 01:00 | Itsusaki, Kaito v Watanuki, Keisuke | 6-3,6-3 |
| ITF Japan F1 | 2017/03/05 01:00 | Osafune, Masaki v Watanuki, Keisuke | 6-7,6-0,2-6 |
| ITF Japan F8 | 2016/06/16 02:15 | Watanuki, Keisuke v Katayama, Sho | 3-6,1-6 |
| ITF Japan F8 | 2016/06/15 04:30 | Takeshima, Shunrou v Watanuki, Keisuke | 6-7,0-6 |
| ITF Japan F7 | 2016/06/09 02:30 | Chan-Yeong Oh v Watanuki, Keisuke | 6-3,6-7,6-4 |