Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| 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 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 M25 Cairns | 2023/10/10 23:50 | Daisuke Sumizawa v Taiyo Yamanaka | 6-2,6-2 |
| ITF M25 Cairns | 2023/10/05 03:35 | Taiyo Yamanaka v Jake Delaney | 4-6,1-6 |
| ITF M25 Cairns | 2023/10/04 01:45 | Taisei Ichikawa v Taiyo Yamanaka | 2-6,1-6 |
| ITF M25 Darwin | 2023/09/21 06:30 | Taiyo Yamanaka v Scott Jones | 6-2,1-6,6-7 |
| ITF M25 Darwin | 2023/09/19 09:25 | Jacob Brumm v Taiyo Yamanaka | 5-7,4-6 |
| ITF M25 Darwin | 2023/09/14 05:25 | Taiyo Yamanaka v Jeremy Beale | 6-7,2-6 |
| ITF M25 Darwin | 2023/09/13 05:30 | Taiyo Yamanaka v Timmy Karpinski | 4-6,6-4,6-2 |
| ITF M15 Nakhon Si Thammarat | 2023/09/05 03:40 | Jacob Bradshaw v Taiyo Yamanaka | 2-6,6-3,7-6 |