Stadium: Court 9 Round: 26 Ground: Clay
| ITF Japan F5 | 2018/04/01 00:30 | Ko Suzuki v Kazuma Kawachi | 4-6,4-6 |
| ITF M15 Karuizawa | 2023/05/30 07:05 | Kazuma Kawachi v Ko Nagashima | 6-2,6-3 |
| ITF M15 Monastir | 2023/04/18 12:45 | Bogdan Bobrov v Kazuma Kawachi | 6-2,6-3 |
| ITF M15 Monastir | 2023/04/12 08:30 | Kazuma Kawachi v Koray Kirci | 1-6,1-6 |
| ITF M25 Kashiwa | 2023/04/05 01:00 | Kazuma Kawachi v Hiroki Moriya | 4-6,2-6 |
| ITF M25 Kashiwa | 2023/04/03 02:30 | Kazuma Kawachi v Shohei Chikami | 7-6,6-4 |
| ITF M15 Heraklion | 2023/03/14 11:15 | Kazuma Kawachi v Orel Kimhi | 7-6,5-7,0-6 |
| ITF M15 Aktobe | 2023/03/09 05:00 | Kazuma Kawachi v Arslanbek Aitkulov | 4-6,3-6 |
| ITF M15 Aktobe | 2023/03/07 11:40 | Kazuma Kawachi v Gabriele Maria Noce | 6-3,6-3 |
| ITF M15 Karuizawa | 2023/05/31 01:00 | Ko Suzuki v Yamato Sueoka | 7-5,6-7,6-4 |
| ITF M15 Karuizawa | 2023/05/30 03:00 | Ko Suzuki v Yusuke Kusuhara | 7-6,4-6,10-8 |
| ITF M25 Kashiwa | 2023/04/02 00:30 | Ko Suzuki v Taiyo Yamanaka | 1-6,6-3,11-13 |
| ITF M25 Tsukuba | 2023/03/29 04:15 | Hiroki Moriya v Ko Suzuki | 6-3,6-1 |
| ITF M25 Tsukuba | 2023/03/27 05:30 | Ko Suzuki v Shunsuke Nakagawa | 6-2,6-4 |
| ITF M25 Tsukuba | 2023/03/27 00:30 | Yuttana Charoenphon v Ko Suzuki | 2-6,2-6 |
| ITF M25 Canberra | 2023/03/20 22:50 | Ko Suzuki v Seon Yong Han | 6-3,2-6,6-10 |
| ITF M25 Canberra | 2023/03/19 23:00 | Ko Suzuki v Luke Sorensen | 6-1,6-2 |