Stadium: Court 3 Round: 54 Ground: Hardcourt outdoor
| ITF M15 Caloundra | 2023/08/01 03:40 | Kazuki Nishiwaki v Ryotaro Matsumura | 6-3,3-6,6-3 |
| ITF M15 Caloundra | 2023/07/25 04:15 | Ryotaro Matsumura v Thomas Braithwaite | 3-6,6-4,5-7 |
| ITF M15 Karuizawa | 2023/06/01 01:45 | Ryotaro Matsumura v Hikaru Shiraishi | 4-6,2-6 |
| 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 |
| ITF M15 Karuizawa | 2023/05/28 01:15 | Seiya Nakanishi v Yua Taka | 4-6,2-6 |
| ITF M25 Kashiwa | 2023/04/02 00:30 | Jeremy Jin v Seiya Nakanishi | 6-3,6-2 |
| ITF M25 Tsukuba | 2023/03/27 00:30 | Seiya Nakanishi v Issei Okamura | 2-6,4-6 |
| Challenger Yokohama | 2022/10/30 02:35 | Seiya Nakanishi v Daisuke Sumizawa | 3-6,0-6 |
| ITF M25 Sapporo | 2022/09/01 02:50 | Rio Noguchi v Seiya Nakanishi | 6-0,6-3 |