Stadium: Ct 3 Round: 44 Ground: Hardcourt outdoor
| ITF M15 Tauranga | 2024/12/15 04:35 | Kohei Hayashi v Paul Howe | 5-7,7-5,10-5 |
| ITF M15 Wellington | 2024/12/10 22:00 | Kiranpal Pannu v Kohei Hayashi | 7-5,6-2 |
| ITF M15 Wellington | 2024/12/09 01:30 | Kohei Hayashi v Duncan McCall | 3-6,5-7 |
| ITF M15 Wellington | 2024/12/08 21:30 | Kohei Hayashi v Paul Howe | 6-3,6-3 |
| Challenger Yokohama | 2024/11/17 01:00 | Philip Sekulic v Kohei Hayashi | 6-2,6-1 |
| ITF M15 Yanagawa | 2024/10/30 00:25 | Yusuke Kusuhara v Kohei Hayashi | 7-5,4-6,6-1 |
| ITF M15 Tanagura | 2024/10/23 05:35 | Kohei Hayashi v Shu Muto | 6-7,5-7 |
| ITF M25 Takasaki | 2024/09/16 02:25 | Naoya Honda v Kohei Hayashi | 6-1,6-2 |
| ITF M15 Tauranga | 2024/12/15 02:50 | Cody Atkinson v Antoine Voisin | 6-3,6-2 |