Ground: Hardcourt outdoor
| ITF M25 Takasaki | 2023/09/20 00:55 | Ryotaro Taguchi v Makoto Ochi | 3-6,2-6 |
| ITF M25 Takasaki | 2023/09/18 01:00 | Ryotaro Taguchi v Ko Suzuki | 6-2,7-5 |
| ITF M25 Sapporo | 2023/09/13 01:00 | Hayato Matsuoka v Ryotaro Taguchi | 6-2,3-6,6-3 |
| ITF M25 Sapporo | 2023/09/11 00:50 | Ryotaro Taguchi v Shunsuke Nakagawa | 6-2,6-2 |
| ITF M25 Sapporo | 2023/09/07 02:50 | Ko Suzuki v Ryotaro Taguchi | 6-4,6-3 |
| ITF M25 Sapporo | 2023/09/05 04:55 | Hikaru Shiraishi v Ryotaro Taguchi | 4-6,6-4,0-6 |
| ITF M25 Sapporo | 2023/09/04 03:20 | Ryotaro Taguchi v Naoya Honda | 6-0,0-6,4-10 |
| ITF M25 Sapporo | 2023/09/03 01:00 | Ryotaro Taguchi v Camden Camacho | 6-1,6-2 |
| ITF M25 Takasaki | 2023/09/22 01:00 | Kazuki Nishiwaki v Collin Altamirano | 3-6,1-6 |
| ITF M25 Takasaki | 2023/09/21 03:50 | Collin Altamirano v Hiroyasu Ehara | 6-4,6-1 |
| ITF M25 Takasaki | 2023/09/20 04:00 | Hayato Matsuoka v Collin Altamirano | 7-5,4-6,2-6 |
| ITF M25 Takasaki | 2023/09/18 03:10 | Collin Altamirano v Shunsuke Nakagawa | 6-3,6-2 |
| ITF M25 Sapporo | 2023/09/13 03:05 | Collin Altamirano v Yuki Mochizuki | 6-7,4-6 |
| ITF M25 Sapporo | 2023/09/11 03:20 | Yuta Tomida v Collin Altamirano | 3-6,5-7 |
| ITF M25 Hong Kong | 2023/09/06 02:00 | Collin Altamirano v Kazuki Nishiwaki | 3-6,5-7 |
| ITF M25 Hong Kong Qual | 2023/09/04 02:00 | Collin Altamirano v Ren Nakamura | 6-4,6-1 |