Stadium: Court 6 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Takasaki | 2023/09/21 01:50 | Kazuki Nishiwaki v Leo Vithoontien | 5-7,6-4,6-4 |
| ITF M15 Nishi-Tokyo | 2024/03/19 01:00 | Leo Vithoontien v Ryotaro Matsumura | 3-6,6-4,10-6 |
| ITF M15 Nishi-Tokyo | 2024/03/18 03:30 | Leo Vithoontien v Shion Motoyama | 6-2,6-2 |
| ITF M15 Hinode | 2024/03/12 01:00 | Leo Vithoontien v Takuya Kumasaka | 2-6,6-4,4-6 |
| ITF M15 Nakhon Si Thammarat | 2024/02/28 07:20 | Leo Vithoontien v Orel Kimhi | 6-7,3-6 |
| ITF M15 Nakhon Si Thammarat | 2024/02/26 04:35 | Leo Vithoontien v Mattias Southcombe | 6-0,6-0 |
| ITF M15 Nakhon Si Thammarat - selejtezők | 2024/02/25 06:30 | Leo Vithoontien v Krittin Koaykul | 6-2,6-7,11-9 |
| ITF M15 Nakhon Si Thammarat | 2024/02/21 03:55 | Leo Vithoontien v Jumpei Yamasaki | 5-7,7-6,0-6 |
| ITF M15 Nakhon Si Thammarat | 2024/02/19 02:00 | Leo Vithoontien v Linghao Zhang | 6-3,6-4 |
| ITF M15 Torello | 2024/03/07 11:40 | Kazuki Nishiwaki v Ergi Kirkin | 1-6,1-6 |
| ITF M15 Torello | 2024/03/06 12:40 | Kazuki Nishiwaki v Manel L Juncadella | 6-4,6-2 |
| ITF M15 Villena | 2024/02/27 12:00 | Fausto Tabacco v Kazuki Nishiwaki | 6-3,6-1 |
| ITF M15 Yanagawa | 2023/12/26 03:25 | Kazuki Nishiwaki v Jumpei Yamasaki | 3-6,3-6 |
| Challenger Yokkaichi | 2023/11/26 04:20 | Calum Puttergill v Kazuki Nishiwaki | 7-5,6-2 |
| Challenger Matsuyama | 2023/11/05 04:55 | Kazuki Nishiwaki v Rio Noguchi | 2-6,5-7 |
| ITF M25 Dharwad | 2023/10/20 04:30 | Kazuki Nishiwaki v Digvijay Pratap Singh | 4-6,7-6,2-6 |
| ITF M25 Dharwad | 2023/10/19 04:35 | Kazuki Nishiwaki v Madhwin Kamath | 6-4,6-4 |