Stadium: Sub Court B Round: 25 Ground: Hardcourt outdoor
| ITF M25 Kashiwa | 2023/04/04 01:00 | Keisuke Saitoh v Yusuke Takahashi | 4-6,6-3,3-6 |
| ITF M25 Tsukuba | 2023/03/28 07:55 | Tatsuma Ito v Keisuke Saitoh | 4-6,7-5,6-2 |
| ITF M25 Canberra | 2023/03/24 03:30 | Keisuke Saitoh v Tristan Schoolkate | 2-6,4-6 |
| ITF M25 Canberra | 2023/03/23 22:30 | Keisuke Saitoh v Jake Delaney | 6-4,0-6,6-4 |
| ITF M25 Canberra | 2023/03/21 00:35 | Keisuke Saitoh v Derek Pham | 6-1,7-6 |
| ITF M25 Canberra | 2023/03/14 01:05 | Keisuke Saitoh v Jeremy Jin | 5-7,2-6 |
| ITF M25 Monastir | 2023/02/20 08:30 | Keisuke Saitoh v Ioannis Xilas | 3-6,3-6 |
| ITF M25 Monastir | 2023/02/13 11:30 | Keisuke Saitoh v Mayeul Darras | 6-2,6-7,9-11 |
| ITF M25 Jakarta | 2023/04/18 03:00 | Derek Pham v Tomohiro Masabayashi | 6-2,1-6,4-10 |
| ITF M25 Jakarta Qual | 2023/04/16 04:30 | Tomohiro Masabayashi v Christian Andre Sheng Liew | 6-2,6-1 |
| ITF M25 Jakarta | 2023/04/12 06:05 | Duckhee Lee v Tomohiro Masabayashi | 6-1,7-6 |
| ITF M25 Jakarta | 2023/04/11 02:00 | Wishaya Trongcharoenchaikul v Tomohiro Masabayashi | 6-4,5-7,7-10 |
| ITF M25 Jakarta | 2023/04/10 02:30 | Seonyong Han v Tomohiro Masabayashi | 7-5,3-6,8-10 |
| ITF M25 Kashiwa | 2023/04/03 05:00 | Yuttana Charoenphon v Tomohiro Masabayashi | 7-5,2-6,10-6 |
| ITF M25 Tsukuba | 2023/03/27 00:30 | Shunsuke Nakagawa v Tomohiro Masabayashi | 5-7,6-3,10-7 |
| UTR Pro Miki | 2023/02/12 02:00 | Tomohiro Masabayashi v Seita Watanabe | 4-6,1-5 |