Stadium: Court 2 Round: 54 Ground: Hardcourt outdoor
| ITF M25 Kashiwa | 2022/09/26 03:20 | Ryusuke Horiuchi v Maximus Kawabata | 6-1,6-0 |
| ITF M15 Karuizawa | 2023/05/28 01:15 | Maximus Kawabata v Luca Hesselmann | 1-6,1-6 |
| ITF M25 Kashiwa | 2022/09/26 03:20 | Ryusuke Horiuchi v Maximus Kawabata | 6-1,6-0 |
| ITF M25 Sapporo | 2023/09/11 02:30 | Ryusuke Horiuchi v Yusuke Kusuhara | 3-6,6-3,6-10 |
| ITF M25 Sapporo | 2023/09/04 03:35 | Ryusuke Horiuchi v Seiya Nakanishi | 6-4,2-6,10-12 |
| ITF M25 Sapporo | 2023/09/03 03:00 | Ryusuke Horiuchi v Kenta Nakamura | 6-3,6-1 |
| ITF M25 Bolzano | 2023/07/31 13:00 | Juan Bautista Otegui v Ryusuke Horiuchi | 5-7,6-2,6-0 |
| ITF M15 Perugia | 2023/07/23 09:30 | Ryusuke Horiuchi v Giorgio Ricca | 0-6,4-6 |
| ITF M15 Gubbio | 2023/07/16 10:00 | Ryusuke Horiuchi v Daniel Bagnolini | 0-6,1-6 |
| ITF M25 Padova | 2023/07/09 10:55 | Leonardo Rossi v Ryusuke Horiuchi | 6-2,6-2 |
| ITF M25 Biella | 2023/07/04 16:45 | Joao Eduardo Schiessl v Ryusuke Horiuchi | 6-0,6-3 |