| UTR Pro Kawaguchi | 2024/06/19 05:25 | Taiyo Kurata v Hikaru Shiraishi | 3-6,1-6 |
| UTR Pro Kawaguchi | 2024/06/19 01:30 | Christopher Kosei Ono v Hikaru Shiraishi | 1-6,1-6 |
| ITF M15 Karuizawa | 2024/05/30 00:55 | Woobin Shin v Hikaru Shiraishi | 6-1,6-4 |
| ITF M15 Karuizawa | 2024/05/29 02:30 | Yuichiro Inui v Hikaru Shiraishi | 1-6,3-6 |
| Challenger Taipei | 2024/05/14 05:10 | James Trotter v Hikaru Shiraishi | 4-6,6-3,6-1 |
| Challenger Taipei | 2024/05/12 03:00 | Yan Cheng Chen v Hikaru Shiraishi | 4-6,6-7 |
| ITF M15 Tsukuba | 2024/03/31 02:30 | Hikaru Shiraishi v Kokoro Isomura | 6-1,6-3 |
| ITF M15 Tsukuba | 2024/03/30 01:25 | Hikaru Shiraishi v Yi Zhou | 6-2,6-4 |
| UTR Pro Kawaguchi | 2024/06/19 00:00 | Taiyo Kurata v Seiya Nakanishi | 3-6,4-6 |
| UTR Pro Kawaguchi | 2024/06/17 02:41 | Seiya Nakanishi v Payton Jim on | 6-0,6-3 |
| ITF M15 Harmon | 2024/06/03 00:00 | Geni Inoue v Seiya Nakanishi | 6-1,6-1 |
| ITF M15 Harmon | 2024/06/02 00:00 | Babji Siva Atturu v Seiya Nakanishi | 1-6,2-6 |
| UTR Pro Urayasu | 2024/05/11 00:00 | Yuki Mochizuki v Seiya Nakanishi | 6-4,6-4 |
| UTR Pro Urayasu | 2024/05/09 03:00 | Kazuki Saito v Seiya Nakanishi | 4-6,2-6 |
| UTR Pro Urayasu | 2024/05/09 01:30 | Hiiro Sakamoto v Seiya Nakanishi | 7-6,7-6 |
| UTR Pro Urayasu | 2024/05/06 02:15 | Toa Maeda v Seiya Nakanishi | 3-6,1-6 |