Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| ITF Hong Kong F2 | 2018/07/05 02:00 | Issei Okamura v Shintaro Imai | 2-6,1-6 |
| ITF Japan F1 | 2015/03/09 00:40 | Shintaro Imai v Issei Okamura | 6-0,6-1 |
| ITF M15 Chiang Rai | 2022/04/19 02:00 | Thantub Suksumrarn v Issei Okamura | 6-3,7-6 |
| ITF M15 Chiang Rai | 2022/04/18 05:45 | Suphawat Saeoui v Issei Okamura | 4-6,2-6 |
| ITF M15 Chiang Rai Qual | 2022/04/17 12:10 | Issei Okamura v Ishaque Eqbal | 6-4,3-6,10-4 |
| ITF M15 Chiang Rai Qual | 2022/04/10 13:10 | Issei Okamura v Alexander Crnokrak | 3-6,4-6 |
| ITF M15 Chiang Rai | 2022/04/05 05:45 | Orel Kimhi v Issei Okamura | 6-7,7-6,6-2 |
| ITF M25 Canberra | 2022/03/31 02:45 | Dayne Kelly v Issei Okamura | 6-0,6-1 |
| ITF M25 Canberra | 2022/03/29 00:40 | Kento Takeuchi v Issei Okamura | 3-6,6-4,4-6 |
| ITF M25 Canberra | 2022/03/22 03:05 | Kento Takeuchi v Issei Okamura | 5-7,6-2,6-2 |
| ITF M25 Calabasas | 2022/03/24 19:10 | Shintaro Imai v Victor Lilov | 7-5,1-6,4-6 |
| ITF M25 Calabasas | 2022/03/23 17:00 | Shintaro Imai v Isaiah Strode | 6-4,3-6,7-6 |
| ITF M25 Bakersfield | 2022/03/17 22:00 | Shintaro Imai v Keegan Smith | 6-7,4-6 |
| ITF M25 Bakersfield | 2022/03/15 23:05 | Shintaro Imai v Victor Lilov | 1-6,6-1,6-4 |
| ITF M25 Falun | 2021/10/02 08:55 | Shintaro Imai v Valentin Royer | 2-6,7-6,6-2 |
| ITF M25 Falun | 2021/10/01 14:30 | Vasil Kirkov v Shintaro Imai | 2-6,5-7 |
| ITF M25 Falun | 2021/09/30 12:30 | Yuta Shimizu v Shintaro Imai | 7-6,6-7,4-6 |
| ITF M25 Falun | 2021/09/29 11:00 | Leandro Riedi v Shintaro Imai | 6-3,1-6,4-6 |