Stadium: Court 2 Round: 26
| Challenger Toyota | 2017/11/14 02:50 | Takeuchi, Kento (1987) v Ehara, Hiroyasu | 4-6,4-6 |
| Challenger Toyota Qual | 2017/11/12 07:05 | Ehara, Hiroyasu v Toshihide Matsui | 6-4,7-6 |
| Challenger Toyota Qual | 2017/11/11 07:35 | Ehara, Hiroyasu v Sakai, Yuto | 6-7,6-2,6-3 |
| ITF Thailand F8 | 2017/10/10 07:50 | Ehara, Hiroyasu v Nam Hoang Ly | 0-6,5-7 |
| ITF Thailand F7 | 2017/10/03 09:50 | Remy Bertola v Ehara, Hiroyasu | 6-2,6-4 |
| ITF Switzerland F5 | 2017/09/03 12:20 | Ehara, Hiroyasu v Marc-Andrea Huesler | 4-6,6-4,6-2 |
| ITF Switzerland F5 | 2017/09/02 11:15 | Viola, Matteo v Ehara, Hiroyasu | 5-7,7-5,6-7 |
| ITF Switzerland F5 | 2017/09/01 11:10 | Ehara, Hiroyasu v Benitez Chavarriaga, Juan Manuel | 1-6,6-2,6-3 |
| Challenger Toyota | 2017/11/15 03:45 | Robert, Stephane v Tatsuma Ito | 3-6,7-5,2-6 |
| Challenger Kobe | 2017/11/08 02:00 | Soonwoo Kwon v Tatsuma Ito | 7-6,6-3 |
| Challenger Kobe | 2017/11/07 04:25 | Duckhee Lee v Tatsuma Ito | 2-6,1-6 |
| Ningbo, China | 2017/10/18 03:00 | Lu, Yen-Hsun v Tatsuma Ito | 6-2,6-3 |
| Ningbo, China | 2017/10/16 06:10 | Rigele Te v Tatsuma Ito | 3-6,5-7 |
| ATP Tokyo Qual | 2017/09/30 04:40 | Tatsuma Ito v Stefanos Tsitsipas | 6-4,6-7,2-6 |
| Challenger - Gwangju | 2017/09/23 01:50 | Tatsuma Ito v Bachinger, Matthias | 6-7,3-6 |
| Challenger - Gwangju | 2017/09/22 02:00 | Steven Diez v Tatsuma Ito | 2-6,4-6 |