Stadium: Center Court Round: 62 Ground: Hardcourt outdoor
| ITF M25 Tsukuba | 2023/03/27 05:00 | Ryotaro Taguchi v Issei Okamura | 7-5,6-2 |
| ITF M25 Tsukuba | 2023/03/27 00:30 | Seiya Nakanishi v Issei Okamura | 2-6,4-6 |
| ITF M15 Aktobe | 2023/03/06 09:40 | Issei Okamura v Mykhailo Mossur | 4-6,6-3,5-10 |
| ITF M15 Aktobe | 2023/02/28 07:30 | Issei Okamura v Max Batyutenko | 6-7,6-4,7-10 |
| ITF M15 Aktobe | 2023/02/27 10:55 | Issei Okamura v Alexander Orlov | 6-2,7-6 |
| ITF M25 Burnie | 2023/02/07 23:00 | Adam Walton v Issei Okamura | 6-3,6-4 |
| ITF M25 Burnie | 2023/02/06 00:00 | Issei Okamura v Stefan Vujic | 7-6,7-6 |
| ITF M25 Burnie | 2023/02/05 01:00 | Issei Okamura v Mason Naumovski | 6-1,6-3 |
| 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 |