Stadium: Court 10 Round: 54 Ground: Hardcourt outdoor
| ITF Japan F5 | 2015/05/30 01:00 | Issei Okamura v Shota Iino | 6-3,2-6,6-4 |
| ITF M15 Nishi-Tokyo | 2019/03/12 01:00 | Issei Okamura v Hikaru Shiraishi | 6-2,6-3 |
| ITF M15 Nishi-Tokyo | 2019/03/11 02:00 | Issei Okamura v Li-Wei Tan | 6-4,6-0 |
| ITF M25 Mildura | 2019/03/07 02:00 | Issei Okamura v Shuichi Sekiguchi | 3-6,6-3,2-6 |
| ITF M25 Mildura | 2019/03/05 23:00 | Issei Okamura v Aaron Addison | 7-5,6-2 |
| ITF M25 Albury | 2019/02/27 23:30 | Issei Okamura v Alexander Crnokrak | 3-6,2-6 |
| ITF M25 Albury | 2019/02/27 02:15 | Colin Sinclair v Issei Okamura | 6-7,6-2,4-6 |
| ITF M25 Albury | 2019/02/25 23:30 | Issei Okamura v Calum Puttergill | 6-3,3-6,10-6 |
| ITF M25 Albury | 2019/02/24 23:30 | Issei Okamura v Mislav Bosnjak | 6-2,7-6 |
| ITF Japan F6 | 2018/04/10 04:45 | Shota Iino v Ryota Tanuma | 2-6,2-6 |
| ITF Japan F6 Qual | 2015/06/07 03:30 | Ryota Kishi v Shota Iino | 7-5,3-6,6-3 |
| ITF Japan F5 | 2015/05/30 01:00 | Issei Okamura v Shota Iino | 6-3,2-6,6-4 |