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 Jakarta | 2022/08/09 02:00 | Anthony Susanto v Issei Okamura | 1-6,5-7 |
| ITF M15 Jakarta | 2022/08/08 05:20 | Phuc Huynh v Issei Okamura | 1-6,6-4,4-10 |
| ITF M15 Jakarta | 2022/08/07 01:55 | Jeremy Nahor v Issei Okamura | 0-6,0-6 |
| ITF M25 Harmon | 2022/06/09 01:40 | Rio Noguchi v Issei Okamura | 1-6,6-3,6-1 |
| ITF M25 Harmon | 2022/06/08 01:20 | Daiki Yoshimura v Issei Okamura | 3-6,7-6,4-6 |
| ITF M25 Harmon | 2022/05/31 00:00 | Issei Okamura v Geun Jun Kim | 6-7,7-5,4-6 |
| 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 |
| Challenger Nur-Sultan | 2022/07/19 05:35 | Shintaro Imai v Beibit Zhukayev | 6-7,1-6 |
| ITF M25 Nur-Sultan | 2022/07/15 06:55 | Shintaro Imai v Beibit Zhukayev | 3-6,6-4,6-7 |
| ITF M25 Nur-Sultan | 2022/07/14 07:05 | Lucas Catarina v Shintaro Imai | 4-6,7-6,4-6 |
| ITF M25 Nur-Sultan | 2022/07/12 08:05 | Alafia Ayeni v Shintaro Imai | 2-6,7-6,4-6 |
| ITF M15 Chiang Rai | 2022/06/19 02:00 | Shintaro Imai v Bu Yunchaokete | 7-5,6-4 |
| ITF M15 Chiang Rai | 2022/06/18 01:55 | Thantub Suksumrarn v Shintaro Imai | 2-6,2-6 |
| ITF M15 Chiang Rai | 2022/06/16 06:15 | Shintaro Imai v Shinji Hazawa | 6-2,6-4 |
| ITF M15 Chiang Rai | 2022/06/15 02:00 | Shintaro Imai v Chanchai Sookton-Eng | 6-4,6-3 |