Stadium: Court 1 Round: 54 Ground: Hardcourt outdoor
| ITF M15 Yanagawa | 2023/12/18 01:00 | Kenta Miyoshi v Hiroki Sakagawa | 4-6,6-2,9-11 |
| ITF M25 Sapporo | 2023/09/11 01:00 | Woobin Shin v Hiroki Sakagawa | 0-6,6-3,10-7 |
| ITF M25 Sapporo | 2023/09/10 01:00 | Hiroki Sakagawa v Hiroyasu Ehara | 6-7,6-1,10-6 |
| ITF M25 Sapporo | 2023/09/05 04:20 | Shuichi Sekiguchi v Hiroki Sakagawa | 6-3,6-2 |
| ITF M25 Sapporo | 2023/09/04 00:55 | Hiroki Sakagawa v Omar Fields | 5-7,6-3,13-11 |
| ITF M25 Sapporo | 2023/09/03 01:00 | Naoki Tajima v Hiroki Sakagawa | 2-6,3-6 |
| ITF M25 Anseong | 2023/06/21 03:40 | Hiroki Sakagawa v Duckhee Lee | 1-6,2-6 |
| ITF M25 Anseong | 2023/06/19 05:25 | Seung Woo Cho v Hiroki Sakagawa | 6-1,1-6,6-10 |
| ITF M25 Dharwad | 2023/10/18 09:25 | Kazuki Nishiwaki v Ryotaro Matsumura | 6-2,7-5 |
| ITF M15 Ahmedabad | 2023/10/10 03:30 | Digvijay Pratap Singh v Ryotaro Matsumura | 6-2,6-4 |
| ITF M25 Takasaki | 2023/09/21 02:00 | Ryotaro Matsumura v Sora Fukuda | 1-6,1-6 |
| ITF M25 Takasaki | 2023/09/20 01:00 | Ryotaro Matsumura v Toru Horie | 6-0,5-7,7-6 |
| ITF M25 Takasaki | 2023/09/18 00:50 | Ryotaro Matsumura v Natsuki Yamamoto | 6-2,6-1 |
| ITF M25 Takasaki | 2023/09/17 01:00 | Ryotaro Matsumura v Seiya Nakanishi | 6-2,6-4 |
| ITF M25 Sapporo | 2023/09/10 03:00 | Ryotaro Matsumura v Yuta Tomida | 6-3,6-7,9-11 |
| ITF M25 Sapporo | 2023/09/08 01:00 | Sora Fukuda v Ryotaro Matsumura | 4-6,6-3,6-4 |