Stadium: Court 1 Round: 62 Ground: Hardcourt outdoor
| UTR Pro Noda | 2023/08/26 00:00 | Hiromasa Koyama v Paul Howe | 6-7,6-7 |
| UTR Pro Noda | 2023/08/25 00:00 | Hiromasa Koyama v Hiiro Sakamoto | 1-6,1-6 |
| UTR Pro Noda | 2023/08/23 06:30 | Hiromasa Koyama v Yuta Tomida | 1-6,3-6 |
| UTR Pro Osaka | 2023/07/30 04:30 | Koki Ohnuma v Hiromasa Koyama | 6-3,5-2 |
| UTR Pro Osaka | 2023/07/28 06:54 | Hiromasa Koyama v Ryoma Matsushita | 1-6,2-6 |
| UTR Pro Osaka | 2023/07/27 06:00 | Hiromasa Koyama v Shu Matsuoka | 1-6,4-6 |
| UTR Pro Osaka | 2023/07/25 00:30 | Brody Nejedly-Krall v Hiromasa Koyama | 6-2,6-3 |
| UTR Pro Miki | 2023/02/12 00:30 | Hiromasa Koyama v Shion Itsusaki | 4-6,6-4,5-7 |
| Davis Cup | 2024/02/03 06:30 | Hong Kit Wong v Benjamin Lock | 3-6,6-3,7-6 |
| ATP Hong Kong | 2023/12/31 05:25 | Hong Kit Wong v Terence Atmane | 4-6,2-6 |
| ITF M15 Yanagawa | 2023/12/25 03:00 | Yuta Tomida v Hong Kit Wong | 6-3,6-2 |
| ITF M15 Yanagawa | 2023/12/20 03:00 | Shu Muto v Hong Kit Wong | 5-7,6-4,10-7 |
| Davis Cup | 2023/09/16 03:00 | Hong Kit Wong v Robert Strombachs | 3-6,6-4,3-6 |
| ITF M25 Hong Kong | 2023/09/06 04:50 | Zhe Li v Hong Kit Wong | 6-4,6-4 |
| ITF M25 Hong Kong | 2023/08/30 03:50 | Naoki Nakagawa v Hong Kit Wong | 7-6,6-3 |
| ITF M25 Jakarta | 2023/08/10 05:10 | Palaphoom Kovapitukted v Hong Kit Wong | 6-2,7-5 |