Stadium: Court 7 Round: 26 Ground: Clay
| ITF M15 Karuizawa | 2023/05/30 03:30 | Ryotaro Matsumura v Naoki Tajima | 3-6,6-1,6-4 |
| ITF M15 Addis Ababa | 2023/05/23 12:00 | Nicolas Villalon v Ryotaro Matsumura | 6-4,6-2 |
| ITF M15 Addis Ababa | 2023/05/18 09:10 | S D Prajwal Dev v Ryotaro Matsumura | 6-3,6-4 |
| ITF M15 Addis Ababa | 2023/05/17 14:00 | Ryotaro Matsumura v Leonardo Catani | 6-4,6-4 |
| UTR Pro Miki | 2023/04/15 05:34 | Ryotaro Matsumura v Ryotaro Taguchi | 6-4,3-6,3-6 |
| UTR Pro Miki | 2023/04/14 02:00 | Ryotaro Matsumura v Kento Tagashira | 6-1,6-3 |
| UTR Pro Miki | 2023/04/13 06:45 | Ryotaro Matsumura v Graham Maassen | 6-0,6-2 |
| UTR Pro Miki | 2023/04/12 00:30 | Taketo Takamisawa v Ryotaro Matsumura | 6-4,2-6,4-6 |
| ITF M15 Karuizawa | 2023/05/31 01:00 | Toru Horie v Hikaru Shiraishi | 4-6,6-4,4-6 |
| ITF M15 Monastir | 2023/05/17 12:35 | Robin Bertrand v Hikaru Shiraishi | 7-5,2-6,6-4 |
| ITF M15 Monastir | 2023/05/16 08:00 | Hikaru Shiraishi v Antoni Fabre | 7-6,6-3 |
| ITF M15 Monastir | 2023/05/15 12:30 | Hikaru Shiraishi v Hillel Rousseau | 6-4,6-3 |
| ITF M15 Monastir | 2023/05/14 08:30 | Hikaru Shiraishi v Mehdi Benchakroun | 6-1,6-3 |
| ITF M15 Monastir | 2023/05/10 10:40 | Hikaru Shiraishi v Eliakim Coulibaly | 6-0,6-7,4-6 |
| ITF M15 Monastir | 2023/05/05 09:55 | Hikaru Shiraishi v Omni Kumar | 5-7,5-7 |
| ITF M15 Monastir | 2023/05/04 10:20 | Hikaru Shiraishi v Michal Mikula | 7-6,6-1 |