Stadium: Court 5 Round: 62 Ground: Hardcourt outdoor
| ITF M25 Anseong | 2023/06/19 02:55 | Young Seok Kim v Byeonghun Kim | 6-0,6-1 |
| ITF M25 Anseong | 2023/06/18 05:15 | Junhyun Lee v Young Seok Kim | 2-6,3-6 |
| ITF M25 Changwon | 2023/06/12 02:45 | Jungwoong Na v Young Seok Kim | 6-2,6-2 |
| ITF M25 Changwon | 2023/06/11 08:35 | Young Seok Kim v Hyeondeok Yoon | 6-2,6-4 |
| ITF M25 Daegu | 2023/06/04 01:00 | Jake Delaney v Young Seok Kim | 6-2,4-6,12-10 |
| Challenger Busan | 2023/05/07 08:45 | Yasutaka Uchiyama v Young Seok Kim | 6-3,6-1 |
| Challenger Seoul | 2023/04/23 04:30 | Yasutaka Uchiyama v Young Seok Kim | 6-1,6-0 |
| ITF M15 Antalya | 2023/04/12 11:00 | Young Seok Kim v Maxime Chazal | 4-6,3-6 |
| ITF M25 Anseong | 2023/06/19 03:25 | Yongjun Shim v Kenta Nakamura | 3-6,2-6 |
| ITF M25 Anseong | 2023/06/18 04:40 | Gwanuk Sim v Kenta Nakamura | 3-6,3-6 |
| ITF M15 Karuizawa | 2023/05/28 01:15 | Kenta Nakamura v Blake Bayldon | 2-6,0-6 |
| ITF M15 Antalya | 2023/05/07 07:00 | Kenta Nakamura v Mateo Del Pino | 5-7,3-6 |
| ITF M15 Antalya | 2023/04/30 07:00 | Tuncay Duran v Kenta Nakamura | 6-0,6-2 |
| ITF M25 Kashiwa | 2023/04/04 01:00 | Yuta Shimizu v Kenta Nakamura | 6-1,6-1 |
| ITF M25 Sapporo | 2022/08/30 01:00 | Rio Noguchi v Kenta Nakamura | 6-1,6-0 |