Head to Head
| Kumamoto Masters | 2024/11/14 03:10 | Jun Hao Leong v Koki Watanabe | W | 2-1 |
| Thomas Cup | 2024/05/02 11:05 | Koki Watanabe v Jun Hao Leong | W | 0-2 |
| Orleans Masters | 2023/04/06 16:00 | Jun Hao Leong v Koki Watanabe | W | 2-0 |
| Indonesia Masters | 2022/10/20 09:00 | Jun Hao Leong v Koki Watanabe | W | 2-1 |
Home History
| Kumamoto Masters | 2024/11/14 03:10 | Jun Hao Leong v Koki Watanabe | W | 2-1 |
| Kumamoto Masters | 2024/11/13 09:10 | Lakshya Sen v Jun Hao Leong | W | 1-2 |
| Denmark Open | 2024/10/16 07:10 | Jonatan Christie v Jun Hao Leong | L | 2-0 |
| Arctic Open | 2024/10/09 05:05 | Jun Hao Leong v Cheuk Yiu Lee | L | 0-2 |
| China Open | 2024/09/18 10:30 | Toma Junior Popov v Jun Hao Leong | L | 2-1 |
| Hong Kong Open | 2024/09/12 10:50 | Cheuk Yiu Lee v Jun Hao Leong | L | 2-1 |
| Hong Kong Open | 2024/09/11 12:15 | Jun Hao Leong v Yin Chak Chan | W | 2-1 |
| Korea Open | 2024/08/28 06:30 | Takuma Obayashi v Jun Hao Leong | L | 2-0 |
Away History
| Kumamoto Masters | 2024/11/14 03:10 | Jun Hao Leong v Koki Watanabe | L | 2-1 |
| Kumamoto Masters | 2024/11/13 11:55 | Chico Aura Dwi Wardoyo v Koki Watanabe | W | 1-2 |
| Denmark Open | 2024/10/20 11:00 | Koki Watanabe v Anders Antonsen | L | 0-2 |
| Denmark Open | 2024/10/19 16:45 | Alex Lanier v Koki Watanabe | W | 0-2 |
| Denmark Open | 2024/10/18 17:30 | Guangzu Lu v Koki Watanabe | W | 0-1 |
| Denmark Open | 2024/10/17 07:00 | Kunlavut Vitidsarn v Koki Watanabe | W | 0-2 |
| Denmark Open | 2024/10/15 07:55 | Koki Watanabe v Chia Hao Lee | W | 2-0 |
| Arctic Open | 2024/10/12 16:55 | Tien Chen Chou v Koki Watanabe | L | 2-1 |