Stadium: Court D Round: 26 Ground: Hardcourt outdoor
| ITF Japan F6 | 2015/06/11 01:00 | Issei Okamura v Duckhee Lee | 1-6,4-6 |
| 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 |
| 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 M15 Sharm El Sheikh | 2022/03/09 09:55 | Duckhee Lee v Filip Duda | 6-0,7-5 |
| ITF M15 Sharm El Sheikh | 2022/03/03 08:00 | Duckhee Lee v Jakub Mensik | 6-4,6-1 |
| ITF M15 Sharm El Sheikh | 2022/03/02 09:55 | Duckhee Lee v Stepan Pecak | 6-2,6-0 |
| ITF M15 Sharm El Sheikh | 2022/02/26 08:55 | Nicholas David Ionel v Duckhee Lee | 0-6,6-2,7-5 |
| ITF M15 Sharm El Sheikh | 2022/02/25 08:00 | Duckhee Lee v Ji Hoon Son | 6-2,6-1 |
| ITF M15 Sharm El Sheikh | 2022/02/24 08:00 | Duckhee Lee v Uisung Park | 6-3,6-7,6-2 |
| ITF M15 Sharm El Sheikh | 2022/02/23 10:00 | Duckhee Lee v Hong Kit Wong | 6-1,6-2 |
| ITF M15 Sharm El Sheikh | 2022/02/20 08:00 | Ben Patael v Duckhee Lee | 2-6,6-1,5-7 |