Stadium: Court 2 Round: 27 Ground: Hardcourt outdoor
| ITF Singapore F1 | 2017/05/26 03:00 | Katayama, Sho v Ehara, Hiroyasu | 3-6,6-4,2-6 |
| ITF Japan F4 | 2017/03/29 03:40 | Ehara, Hiroyasu v Katayama, Sho | 2-6,4-6 |
| ITF Japan F2 | 2017/03/13 04:00 | Katayama, Sho v Ehara, Hiroyasu | 6-3,7-6 |
| ITF China F8 | 2018/06/06 02:00 | Katayama, Sho v Bang Shuo Yin | 6-2,6-4 |
| ITF China F8 | 2018/06/04 03:50 | Katayama, Sho v Wu, Hao | 6-2,6-2 |
| ITF Japan F6 | 2018/04/11 01:00 | Katayama, Sho v Zhe Li | 1-6,6-3,4-6 |
| ITF Japan F5 | 2018/04/03 04:10 | Katayama, Sho v Renta Tokuda | 2-6,4-6 |
| ITF Japan F4 | 2018/03/30 03:30 | Katayama, Sho v Yosuke Watanuki | 4-6,4-6 |
| ITF Japan F4 | 2018/03/29 03:45 | Katayama, Sho v Tamaki Yamao | 6-4,6-4 |
| ITF Japan F4 | 2018/03/27 03:00 | Takeuchi, Kento (1987) v Katayama, Sho | 6-4,4-6,5-7 |
| ITF Japan F3 | 2018/03/22 08:45 | Katayama, Sho v Kaito Uesugi | 3-6,1-6 |
| ITF China F8 | 2018/06/06 03:25 | RunYu Zhao v Ehara, Hiroyasu | 3-6,1-6 |
| ITF China F8 | 2018/06/04 03:25 | Gao, Qun v Ehara, Hiroyasu | 4-6,7-6,2-6 |
| ITF China F7 | 2018/05/31 04:30 | Ehara, Hiroyasu v He, Yecong | 6-4,4-6,1-6 |
| ITF China F7 | 2018/05/29 02:00 | Ehara, Hiroyasu v Jie Cui | 6-4,6-2 |
| Challenger Busan Qual | 2018/05/13 03:25 | Ehara, Hiroyasu v Blake Ellis | 6-7,6-3,3-6 |
| Challenger Gimcheon Qual | 2018/05/06 04:30 | Ehara, Hiroyasu v Makoto Ochi | 7-6,3-6,4-6 |
| ITF Japan F6 | 2018/04/15 04:00 | Ehara, Hiroyasu v Renta Tokuda | 0-6,6-7 |
| ITF Japan F6 | 2018/04/14 01:00 | Kazuki Nishiwaki v Ehara, Hiroyasu | 2-6,6-7 |