Round: 26 Ground: Clay
| ITF Japan F8 | 2017/06/14 04:00 | Gengo Kikuchi v Yuki Matsuo | 6-0,6-4 |
| ITF Japan F7 | 2017/06/06 01:00 | Gengo Kikuchi v Sora Fukuda | 2-6,2-6 |
| ITF Japan F6 | 2017/06/02 08:15 | Renta Tokuda v Gengo Kikuchi | 4-6,6-1,6-3 |
| ITF Japan F6 | 2017/05/31 01:00 | Gengo Kikuchi v Shuichi Sekiguchi | 6-4,6-2 |
| ITF Japan F6 | 2017/05/29 04:20 | Ryota Kishi v Gengo Kikuchi | 7-6,3-6,2-6 |
| ITF Japan F5 | 2017/04/05 02:10 | Gengo Kikuchi v Shintaro Imai | 4-6,6-4,3-6 |
| ITF Japan F5 | 2017/04/03 02:45 | Shunrou Takeshima v Gengo Kikuchi | 0-6,4-6 |
| ITF Japan F4 | 2017/03/30 01:00 | Seong Chan Hong v Gengo Kikuchi | 6-3,6-3 |
| ITF Japan F8 | 2017/06/14 03:00 | Katsuki Nagao v Taisei Ichikawa | 6-0,6-1 |
| ITF Japan F7 | 2017/06/03 01:00 | Katsuki Nagao v Rimpei Kawakami | 6-7,6-7 |
| ITF Japan F5 | 2017/04/04 04:40 | Tatsuma Ito v Katsuki Nagao | 7-6,6-4 |
| ITF Japan F5 | 2017/04/01 02:00 | Katsuki Nagao v Kazuki Shimizu | 6-3,6-3 |
| ITF Japan F4 | 2017/03/28 01:00 | Katsuki Nagao v Shunrou Takeshima | 2-6,2-6 |
| ITF Japan F4 | 2017/03/26 00:59 | Katsuki Nagao v Nasa Hatakeyama | 6-2,6-3 |
| ITF Japan F4 | 2017/03/25 01:00 | Katsuki Nagao v Ryohei Tagata | 2-6,6-2,6-0 |
| ITF Japan F3 | 2017/03/19 01:00 | Jeamoon Lee v Katsuki Nagao | 7-6,6-4 |