Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| Challenger Nanchang | 2018/04/19 04:30 | Xin Gao v Quentin Halys | 2-6,1-6 |
| ITF Japan F6 | 2018/04/12 01:00 | Jumpei Yamasaki v Xin Gao | 3-6,7-6,6-4 |
| ITF Japan F6 | 2018/04/10 01:00 | Xin Gao v Shintaro Imai | 6-3,6-4 |
| ITF Japan F5 | 2018/04/04 04:50 | Zhe Li v Xin Gao | 6-3,7-5 |
| ITF Japan F5 | 2018/04/03 01:00 | Cing-Yang Meng v Xin Gao | 2-6,4-6 |
| ITF Japan F4 | 2018/03/27 01:00 | Seong Chan Hong v Xin Gao | 6-3,6-4 |
| Challenger Qujing | 2018/03/19 02:00 | Hiroki Moriya v Xin Gao | 6-7,6-4,6-2 |
| Challenger Shenzhen Qual | 2018/03/11 09:10 | Xin Gao v Hiroki Moriya | 4-6,4-6 |
| ITF Japan F4 | 2018/03/24 00:00 | Teppei Uesugi v Naru Shirafuji | 6-2,6-3 |
| ITF Japan F3 | 2018/03/17 04:00 | Rimpei Kawakami v Naru Shirafuji | 6-3,6-2 |
| ITF Japan F2 | 2018/03/12 00:30 | Jumpei Yamasaki v Naru Shirafuji | 6-0,6-0 |
| ITF Japan F1 | 2018/03/07 03:15 | Yuki Mochizuki v Naru Shirafuji | 6-4,6-3 |
| ITF Japan F1 | 2018/03/06 01:00 | Naru Shirafuji v Masaki Osafune | 6-0,6-3 |
| ITF Japan F1 | 2018/03/04 01:00 | Naru Shirafuji v Ryuhei Azuma | 6-2,6-2 |
| ITF Japan F1 | 2018/03/03 03:00 | Naru Shirafuji v Keigo Shimizu | 6-2,6-1 |
| Challenger Kyoto Qual | 2018/02/17 04:45 | Hiroyasu Ehara v Naru Shirafuji | 7-5,6-2 |