Stadium: Court 3 Round: 54 Ground: Hardcourt outdoor
| ITF M25 Matsuyama | 2019/04/10 07:00 | Jumpei Yamasaki v Issei Okamura | 6-4,5-7,1-6 |
| ITF - Kashiwa M15 | 2019/04/04 01:00 | Issei Okamura v Jumpei Yamasaki | 3-6,2-6 |
| ITF Thailand F3 | 2016/09/07 02:00 | Issei Okamura v Jumpei Yamasaki | 6-4,2-6,4-6 |