Stadium: 19 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Daegu | 2023/06/05 01:00 | Issei Okamura v Chan-Yeong Oh | 1-6,6-4,7-10 |
| ITF Vietnam F4 | 2016/09/13 07:10 | Chan-Yeong Oh v Issei Okamura | 6-7,3-6 |
| ITF M15 Bali | 2024/09/18 04:35 | Chan-Yeong Oh v Bogdan Bobrov | 6-3,3-6,4-6 |
| ITF M15 Bali | 2024/09/17 07:30 | Chan-Yeong Oh v Mathieu Scaglia | 3-6,6-3,6-4 |
| ITF M25 Bali | 2024/09/16 03:30 | Chan-Yeong Oh v Ye Hongyu | 6-2,6-4 |
| ITF M25 Bali | 2024/09/15 01:30 | Chan-Yeong Oh v Justin Kuo | 6-0,6-0 |
| ITF M15 Singapore | 2024/09/12 03:30 | Samir Banerjee v Chan-Yeong Oh | 6-7,6-4,6-1 |
| ITF M15 Singapore | 2024/09/11 06:25 | Natthayut Nithithananont v Chan-Yeong Oh | 1-6,1-6 |
| ITF M25 Nakhon Si Thammarat | 2024/08/26 03:15 | Chan-Yeong Oh v Hugo Pierre | 6-4,2-6,5-10 |
| ITF M25 Nakhon Si Thammarat | 2024/08/25 07:15 | Chan-Yeong Oh v Pannawat Suttisomboon | 6-1,6-1 |
| ITF M15 Bali | 2024/09/17 05:10 | Leo Vithoontien v Issei Okamura | 3-6,6-2,7-6 |
| ITF M25 Bali | 2024/09/16 03:30 | Issei Okamura v Jack Bruce-Smith | 6-1,6-3 |
| ITF M25 Bali | 2024/09/15 01:30 | Issei Okamura v Alexey Shtengelov | 6-2,6-2 |
| ITF M15 Singapore | 2024/09/11 04:05 | Aldin Setkic v Issei Okamura | 6-4,6-4 |
| ITF M15 Hong Kong | 2024/09/04 02:00 | Issei Okamura v Samir Banerjee | 3-6,4-6 |
| ITF M25 Hong Kong | 2024/08/29 02:00 | Alexey Zakharov v Issei Okamura | 6-3,6-3 |
| ITF M25 Hong Kong | 2024/08/27 08:20 | Kazuki Nishiwaki v Issei Okamura | 2-6,4-6 |
| ITF M25 Taipei | 2024/08/04 02:00 | Jeffrey Hsu v Issei Okamura | 2-6,6-1,9-11 |