Ground: Hardcourt indoor
| ITF M15 Karuizawa | 2025/06/04 06:36 | Jumpei Yamasaki v Yamato Yukawa | 6-0,6-1 |
| ITF M15 Osaka | 2025/04/22 04:30 | Yusuke Kusuhara v Yamato Yukawa | 7-6,6-1 |
| ITF M15 Osaka | 2025/04/21 01:00 | Kazuki Nishiwaki v Yamato Yukawa | 7-6,3-6,0-1 |
| ITF M15 Nishi-Tokyo | 2025/03/20 01:00 | Tsung-Hao Huang v Yamato Yukawa | 6-4,6-3 |
| ITF M15 Nishi-Tokyo | 2025/03/19 06:00 | Ryotaro Matsumura v Yamato Yukawa | 4-6,5-7 |
| UTR Pro Kawaguchi | 2024/06/29 06:12 | Taiyo Kurata v Yamato Yukawa | 6-2,6-4 |
| UTR Pro Kawaguchi | 2024/06/27 02:00 | Yamato Yukawa v Kosuke Morita | 2-6,2-6 |
| UTR Pro Kawaguchi | 2024/06/26 02:00 | Yamato Yukawa v Corey Craig | 1-6,0-6 |
| ITF M15 Karuizawa | 2025/06/04 05:45 | Ko Suzuki v Kohei Hayashi | 6-3,6-3 |
| ITF M15 Osaka | 2025/04/15 02:30 | Kentaro Otsuka v Kohei Hayashi | 6-3,6-5 |
| ITF M15 Tsukuba | 2025/03/26 01:00 | Kohei Hayashi v Tsung-Hao Huang | 1-6,0-6 |
| ITF M15 Nishi-Tokyo | 2025/03/18 01:00 | Yusuke Kusuhara v Kohei Hayashi | 6-1,6-3 |
| ITF M25 Doha | 2025/01/19 13:02 | Kohei Hayashi v Ali Habib | 3-6,6-1,0-1 |
| ITF M15 Doha | 2025/01/13 12:00 | Naoki Tajima v Kohei Hayashi | 6-2,7-6 |
| ITF M15 Tauranga | 2024/12/17 22:55 | Kohei Hayashi v Isaac Becroft | 1-6,7-6,6-7 |
| ITF M15 Tauranga | 2024/12/16 21:00 | Kohei Hayashi v Cody Atkinson | 6-4,6-7,10-8 |