Stadium: Court 1 Round: 25 Ground: Clay
| ITF M25 Tsukuba | 2023/03/27 06:00 | Naoki Tajima v Ryotaro Matsumura | 6-3,0-6,10-4 |
| 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 |
| UTR Pro Miki | 2023/04/11 02:00 | Lemiel Kei Taira v Ryotaro Matsumura | 2-6,0-6 |
| ITF M25 Jakarta | 2023/04/25 04:15 | Naoki Tajima v Credit Chaiyarin | 7-5,3-6,8-10 |
| ITF M25 Jakarta | 2023/04/24 06:30 | Naoki Tajima v Arsya Philo Wisyesa Putra Sjarifuddin | 6-0,6-0 |
| ITF M25 Jakarta | 2023/04/17 07:00 | Naoki Tajima v Andrew Rogers | 6-7,4-6 |
| ITF M25 Jakarta Qual | 2023/04/16 04:40 | Pruchya Isarow v Naoki Tajima | 6-2,3-6,8-10 |
| ITF M25 Kashiwa | 2023/04/03 02:30 | Hiroyasu Ehara v Naoki Tajima | 6-4,6-2 |
| ITF M25 Tsukuba | 2023/03/30 01:00 | Renta Tokuda v Naoki Tajima | 6-0,6-4 |
| ITF M25 Tsukuba | 2023/03/27 06:00 | Naoki Tajima v Ryotaro Matsumura | 6-3,0-6,10-4 |
| ITF M25 Tsukuba | 2023/03/27 00:30 | Taiyo Yamanaka v Naoki Tajima | 6-4,5-7,8-10 |