Round: 27 Ground: Hardcourt outdoor
| ITF Japan F7 | 2015/06/19 04:45 | Ehara, Hiroyasu v Tanuma, Ryota | 6-2,6-0 |
| ITF Japan F4 | 2018/03/29 01:00 | Sora Fukuda v Tanuma, Ryota | 7-6,1-6,4-6 |
| ITF Japan F4 | 2018/03/28 01:00 | Tanuma, Ryota v Rigele Te | 7-5,6-4 |
| ITF Japan F4 | 2018/03/26 01:00 | Tanuma, Ryota v Matsuo, Yuki | 6-2,6-1 |
| ITF Japan F4 | 2018/03/25 01:00 | Tanuma, Ryota v Wei-De Lin | 6-1,7-6 |
| ITF Japan F4 | 2018/03/24 00:00 | Tanuma, Ryota v Shimizu, Kazuki | 6-2,6-1 |
| ITF Japan F3 | 2018/03/22 06:55 | Tatsuma Ito v Tanuma, Ryota | 6-7,6-2,6-1 |
| ITF Japan F3 | 2018/03/22 03:00 | Tanuma, Ryota v Sora Fukuda | 6-3,6-2 |
| ITF Japan F3 | 2018/03/19 04:05 | Fujii, Shinta v Tanuma, Ryota | 2-6,2-6 |
| ITF Japan F4 | 2018/03/29 01:00 | Makoto Ochi v Ehara, Hiroyasu | 6-4,5-7,4-6 |
| ITF Japan F4 | 2018/03/28 03:00 | Liu, Shao-Fan v Ehara, Hiroyasu | 1-6,5-7 |
| ITF Japan F3 | 2018/03/22 04:45 | Tung-Lin Wu v Ehara, Hiroyasu | 6-4,7-6 |
| ITF Japan F3 | 2018/03/19 01:00 | Tamaki Yamao v Ehara, Hiroyasu | 6-2,3-6,0-6 |
| ITF Japan F2 | 2018/03/13 02:10 | Yuta Shimizu v Ehara, Hiroyasu | 7-6,6-3 |
| Challenger Yokohama | 2018/03/01 03:35 | Jordan Thompson v Ehara, Hiroyasu | 6-4,6-2 |
| Challenger Yokohama | 2018/02/27 06:50 | Ehara, Hiroyasu v Whittington, Andrew | 7-6,6-7,6-4 |
| Yokohama, Japan, Qualifying | 2018/02/26 01:00 | Li, Zhe v Ehara, Hiroyasu | 6-7,6-3,4-6 |