Ground: Hardcourt outdoor
| UTR Pro Noda | 2023/10/18 00:00 | Sota Tani v Kazuma Kawachi | 2-6,2-6 |
| 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 |
| 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 05:00 | Yuto Okuchi v Natsuki Yamamoto | 2-6,3-6 |
| UTR Pro Osaka | 2023/07/30 00:30 | Brody Nejedly-Krall v Yuto Okuchi | 4-6,6-6 |
| UTR Pro Osaka | 2023/07/28 00:30 | Yuto Okuchi v Jake Bhangdia | 0-6,6-7 |
| UTR Pro Osaka | 2023/07/25 02:00 | Yuto Okuchi v Koki Matsuda | 3-6,3-6 |
| UTR Pro Osaka | 2023/07/24 03:30 | Mizuki Kawada v Yuto Okuchi | 6-2,1-6,7-5 |
| UTR Pro Miki | 2023/07/01 08:41 | Yuto Okuchi v Takeyasu Sekiguchi | 3-6,2-6 |
| UTR Pro Miki | 2023/06/30 03:27 | Yuta Tomida v Yuto Okuchi | 6-3,6-0 |