Stadion: Center Court Round: 62 Ground: Hardcourt outdoor
| ITF - M15 - Karuizawa | 2023/05/30 03:30 | Issei Okamura v Sanhui Shin | 6-3,2-6,1-6 |
| ITF - M25 - Nottingham | 2023/05/01 09:00 | Issei Okamura v Ryan James Storrie | 3-6,3-6 |
| ITF - M25 - Nottingham - Qualifikation | 2023/04/30 09:00 | Issei Okamura v Joseph White | 6-0,6-2 |
| ITF - M25 - Nottingham | 2023/04/25 09:00 | Issei Okamura v George Houghton | 2-6,1-6 |
| ITF - M25 - Nottingham - Qualifikation | 2023/04/24 13:00 | Issei Okamura v Max Benaim | 6-4,6-4 |
| ITF - M25 - Kashiwa | 2023/04/06 03:40 | Kaito Uesugi v Issei Okamura | 6-1,6-4 |
| ITF - M25 - Kashiwa | 2023/04/05 05:35 | Issei Okamura v Sho Shimabukuro | 7-6,0-6,7-6 |
| ITF - M25 - Kashiwa | 2023/04/03 01:00 | Koki Matsuda v Issei Okamura | 1-6,2-6 |
| ITF - M15 - Daegu | 2022/08/28 03:30 | Woobin Shin v Jin Sung Han | 6-2,6-3 |
| ITF - M15 - Anseong | 2022/08/14 05:25 | Hyeondeok Yoon v Jin Sung Han | 6-4,6-3 |
| ITF - M15 - Gimcheon | 2019/06/18 03:50 | Jin Sung Han v Cheong-Eui Kim | 6-4,4-6,1-6 |
| ITF - M15 - Gimcheon | 2019/06/10 02:00 | Seita Watanabe v Jin Sung Han | 6-1,6-2 |
| ITF - M15 - Daegu | 2019/06/03 01:00 | Young Seok Kim v Jin Sung Han | 6-4,6-4 |
| ITF - Korea F6 | 2018/08/26 03:00 | Jae Won Yun v Jin Sung Han | 7-6,5-7,7-6 |
| ITF - Korea F5 | 2018/08/19 02:00 | Jin Sung Han v Seong Jae Han | 4-6,5-7 |
| ITF - Korea F4 | 2018/08/13 01:00 | Ki Su Jung v Jin Sung Han | 6-4,6-3 |