Estadio: Court 5 Round: 25 Ground: Clay
| ITF M25 Anseong | 2023/06/21 02:00 | Sanhui Shin v Issei Okamura | 6-2,6-3 |
| ITF M15 Karuizawa | 2023/05/30 03:30 | Issei Okamura v Sanhui Shin | 6-3,2-6,1-6 |
| ITF M15 Nakhon Si Thammarat | 2023/07/21 01:55 | Sanhui Shin v Palaphoom Kovapitukted | 5-7,6-4,2-6 |
| ITF M15 Nakhon Si Thammarat | 2023/07/20 04:30 | Sanhui Shin v Thanapet Chanta | 6-1,6-4 |
| ITF M15 Nakhon Si Thammarat | 2023/07/18 02:00 | Sanhui Shin v Pruchya Isarow | 6-2,6-2 |
| ITF M15 Nakhon Si Thammarat | 2023/07/12 03:35 | Sanhui Shin v Kasidit Samrej | 4-6,4-6 |
| ITF M15 Nakhon Si Thammarat | 2023/07/06 07:00 | Sanhui Shin v S D Prajwal Dev | 3-6,6-7 |
| ITF M15 Nakhon Si Thammarat | 2023/07/05 06:45 | Sanhui Shin v Thanapet Chanta | 6-4,6-4 |
| ITF M25 Anseong | 2023/06/25 02:50 | Gerard Campana Lee v Sanhui Shin | 7-5,6-4 |
| ITF M25 Anseong | 2023/06/24 05:50 | Sanhui Shin v Yuki Mochizuki | 7-5,1-6,6-3 |
| ITF M25 Tainan | 2023/08/16 02:00 | Ergi Kirkin v Issei Okamura | 6-0,6-2 |
| ITF M25 Herzliya | 2023/08/09 11:25 | Amit Vales v Issei Okamura | 6-4,3-6,6-3 |
| ITF M25 Herzliya | 2023/08/08 06:30 | Issei Okamura v Eyal Shyovitz | 6-4,6-3 |
| ITF M25 Herzliya | 2023/08/07 06:30 | Issei Okamura v Raz Katz | 6-1,6-1 |
| ITF M15 Raanana | 2023/08/01 13:20 | Issei Okamura v Ofek Shimanov | 6-4,3-6,2-6 |
| ITF M15 Yakarta | 2023/06/27 05:00 | Koki Matsuda v Issei Okamura | 6-3,7-6 |
| ITF M25 Anseong | 2023/06/21 02:00 | Sanhui Shin v Issei Okamura | 6-2,6-3 |
| ITF M25 Daegu | 2023/06/05 01:00 | Issei Okamura v Chan-Yeong Oh | 1-6,6-4,7-10 |