Stadium: 11 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Yanagawa | 2023/12/20 03:00 | Kazuma Kawachi v Yuto Oki | 6-2,6-4 |
| ITF M15 Yanagawa | 2023/12/26 03:00 | Yuto Oki v Yuta Kawahashi | 1-6,6-4,0-6 |
| ITF M15 Yanagawa | 2023/12/20 03:00 | Kazuma Kawachi v Yuto Oki | 6-2,6-4 |
| 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 | Taichi Wakamatsu 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 |
| ITF M15 Nakhon Si Thammarat | 2024/07/10 02:00 | Daisuke Sumizawa v Kazuma Kawachi | 7-6,6-7,6-2 |
| ITF M15 Ust-Kamenogorsk | 2024/07/05 10:00 | Egor Agafonov v Kazuma Kawachi | 6-4,2-6,6-4 |
| ITF M15 Ust-Kamenogorsk | 2024/07/04 05:00 | Kazuma Kawachi v Maksim Shin | 6-3,0-6,6-2 |
| ITF M15 Ust-Kamenogorsk | 2024/07/03 06:05 | Daniel Ibragimov v Kazuma Kawachi | 2-6,4-6 |
| ITF M15 Ust-Kamenogorsk | 2024/06/27 05:00 | Kazuma Kawachi v Sergey Fomin | 2-6,2-6 |
| ITF M15 Ust-Kamenogorsk | 2024/06/26 06:40 | Kazuma Kawachi v Timur Maulenov | 6-1,6-2 |
| ITF M15 Hong Kong | 2024/06/19 03:40 | Thanapet Chanta v Kazuma Kawachi | 6-2,1-6,6-2 |
| ITF M15 Harmon | 2024/06/05 07:15 | Kazuma Kawachi v Ko Suzuki | 6-3,6-3 |