Stadium: Court 1 Round: 26 Ground: Hardcourt outdoor
| Challenger Kyoto Qual | 2018/02/17 04:45 | Hiroyasu Ehara v Naru Shirafuji | 7-5,6-2 |
| ITF Guam F1 | 2018/06/18 02:10 | Hiroyasu Ehara v Ren Nakamura | 6-4,6-4 |
| ITF China F8 | 2018/06/09 05:15 | Hiroyasu Ehara v Zhe Li | 3-6,6-7 |
| ITF China F8 | 2018/06/08 04:10 | Sho Katayama v Hiroyasu Ehara | 0-6,2-6 |
| ITF China F8 | 2018/06/06 03:25 | RunYu Zhao v Hiroyasu Ehara | 3-6,1-6 |
| ITF China F8 | 2018/06/04 03:25 | Qun Gao v Hiroyasu Ehara | 4-6,7-6,2-6 |
| ITF China F7 | 2018/05/31 04:30 | Hiroyasu Ehara v Yecong He | 6-4,4-6,1-6 |
| ITF China F7 | 2018/05/29 02:00 | Hiroyasu Ehara v Jie Cui | 6-4,6-2 |
| Challenger Busan Qual | 2018/05/13 03:25 | Hiroyasu Ehara v Blake Ellis | 6-7,6-3,3-6 |
| ITF Guam F1 | 2018/06/19 02:40 | James Ibrahim v Naru Shirafuji | 5-7,6-3,3-6 |
| ITF Japan F8 | 2018/06/12 01:00 | Naru Shirafuji v Yunosuke Tanaka | 4-6,2-6 |
| ITF China F5 Qual | 2018/05/05 06:00 | Naru Shirafuji v Jianhui Li | 1-6,4-6 |
| ITF China F4 | 2018/05/01 02:40 | Xin Gao v Naru Shirafuji | 7-5,6-4 |
| 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 |