Stadium: Court 1 Round: 26 Ground: Hardcourt outdoor
| 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 |
| ITF M25 Hong Kong Qual | 2023/09/03 02:00 | Collin Altamirano v Ching Ho Sunny Yue | 6-0,6-2 |
| ITF M25 Hong Kong | 2023/08/31 04:50 | Collin Altamirano v Ajeet Rai | 3-6,3-6 |
| ITF M25 Takasaki | 2023/09/19 02:30 | Hiroyasu Ehara v Yusuke Takahashi | 7-5,6-4 |
| ITF M25 Takasaki | 2023/09/18 02:40 | Yusuke Kusuhara v Hiroyasu Ehara | 6-1,4-6,6-10 |
| ITF M25 Sapporo | 2023/09/10 01:00 | Hiroki Sakagawa v Hiroyasu Ehara | 6-7,6-1,10-6 |
| ITF M25 Kashiwa | 2023/04/05 02:40 | Rimpei Kawakami v Hiroyasu Ehara | 6-0,6-0 |
| ITF M25 Kashiwa | 2023/04/03 02:30 | Hiroyasu Ehara v Naoki Tajima | 6-4,6-2 |
| ITF M25 Kashiwa | 2023/04/02 04:00 | Yuichiro Inui v Hiroyasu Ehara | 4-6,2-6 |
| ITF M15 Antalya | 2023/03/14 11:20 | Gabriele Pennaforti v Hiroyasu Ehara | 6-0,6-2 |
| ITF M15 Antalya | 2023/03/13 16:10 | Jiri Jenicek v Hiroyasu Ehara | 2-6,1-6 |