Round: 25 Ground: Hardcourt outdoor
| ITF Japan F6 | 2016/05/31 05:25 | Yusuke Takahashi v Keisuke Watanuki | 6-3,6-4 |
| ITF Japan F4 | 2016/03/27 01:00 | Yusuke Takahashi v Keisuke Watanuki | 4-6,3-6 |
| ITF Japan F1 | 2017/03/12 02:00 | Yusuke Takahashi v Takuto Niki | 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 Sho Katayama | 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 Shin Yoshida | 6-2,6-1 |
| Challenger Yokohama Qual | 2017/02/25 01:00 | Yusuke Takahashi v Shuichi Sekiguchi | 6-4,3-6,2-6 |
| Challenger Kyoto Qual | 2017/02/18 07:35 | Arata Onozawa 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 | 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 |
| 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 |