Ground: Hardcourt outdoor
| UTR Pro Noda | 2023/10/17 00:00 | Sota Tani v Yuto Okuchi | 7-6,3-6,6-4 |
| UTR Pro Noda | 2023/10/16 06:00 | Sota Tani v Chaitanya Irkar | 6-7,7-5,6-2 |
| UTR Pro Noda | 2023/10/17 01:30 | Chaitanya Irkar v Kazuma Kawachi | 4-6,4-6 |
| ITF M25 Takasaki | 2023/09/20 06:45 | Kazuma Kawachi v Hikaru Shiraishi | 3-6,3-6 |
| ITF M25 Sapporo | 2023/09/15 01:00 | Kazuma Kawachi v Hayato Matsuoka | 3-6,6-0,4-6 |
| ITF M25 Sapporo | 2023/09/12 02:00 | Yusuke Takahashi v Kazuma Kawachi | 6-4,3-6,2-6 |
| ITF M15 Monastir | 2023/08/23 12:35 | Kazuma Kawachi v Mohammad Alkotop | 3-6,1-6 |
| ITF M15 Monastir | 2023/08/15 13:05 | Younes Lalami Laaroussi v Kazuma Kawachi | 6-1,6-2 |
| ITF M25 Herzlia | 2023/08/08 07:50 | Orel Kimhi v Kazuma Kawachi | 7-6,6-2 |
| ITF M15 Raanana | 2023/08/01 12:20 | Kazuma Kawachi v Itamar Tapiro | 6-3,2-6,5-7 |