Stadium: Court 1 Round: 54 Ground: Hardcourt outdoor
| Challenger Yokkaichi | 2023/11/26 01:00 | Nathan Ponwith v Kazuma Kawachi | 6-7,6-4,7-5 |
| ITF M25 Mumbai | 2023/11/21 06:20 | Kazuma Kawachi v Siddhant Banthia | 6-3,6-7,1-6 |
| UTR Pro Noda | 2023/10/21 00:00 | Sora Fukuda v Kazuma Kawachi | 6-1,5-3 |
| UTR Pro Noda | 2023/10/20 00:00 | Kazuma Kawachi v Natsuki Yamamoto | 6-4,6-1 |
| UTR Pro Noda | 2023/10/19 00:00 | Kazuma Kawachi v Yuto Okuchi | 6-4,6-7,6-0 |
| 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 M15 Yanagawa | 2023/12/18 03:00 | Yuto Oki v Changli Zhang | 4-6,6-0,10-8 |
| Challenger Matsuyama | 2023/11/05 03:35 | Naoki Nakagawa v Yuto Oki | 6-4,6-2 |
| UTR Pro Miki | 2023/04/16 02:00 | Shinde Yuzuki v Yuto Oki | 4-6,6-0,5-7 |
| UTR Pro Miki | 2023/04/15 08:48 | Wakamatsu Taichi v Yuto Oki | 6-4,3-6,6-6 |
| UTR Pro Miki | 2023/04/14 02:00 | Ren Nakamura v Yuto Oki | 6-3,6-0 |
| UTR Pro Miki | 2023/04/13 00:30 | Yudai Umeoka v Yuto Oki | 2-6,0-6 |
| UTR Pro Miki | 2023/04/12 05:09 | Brody Nejedly v Yuto Oki | 3-6,0-6 |
| UTR Pro Miki | 2023/04/10 04:00 | Ryotaro Taguchi v Yuto Oki | 6-1,6-1 |