Ground: Hardcourt outdoor
| UTR Pro Miki | 2023/07/01 02:00 | Taiyo Kurata v Shunya Maruyama | 3-6,4-6 |
| UTR Pro Miki | 2023/06/30 00:30 | Hiiro Sakamoto v Taiyo Kurata | 3-6,7-5,6-0 |
| UTR Pro Miki | 2023/06/29 03:30 | Natsuki Yamamoto v Taiyo Kurata | 6-7,0-6 |
| UTR Pro Miki | 2023/06/27 02:00 | Sota Minami v Taiyo Kurata | 2-6,3-6 |
| UTR Pro Miki | 2023/06/26 00:30 | Taiyo Kurata v Kento Tagashira | 6-4,6-3 |
| ITF M15 Yanagawa | 2023/12/25 00:30 | Kazuma Kawachi v Seiya Nakanishi | 6-3,6-0 |
| ITF M25 Takasaki | 2023/09/17 01:00 | Ryotaro Matsumura v Seiya Nakanishi | 6-2,6-4 |
| ITF M25 Sapporo | 2023/09/05 04:15 | Issei Okamura v Seiya Nakanishi | 6-1,6-1 |
| ITF M25 Sapporo | 2023/09/04 03:35 | Ryusuke Horiuchi v Seiya Nakanishi | 6-4,2-6,10-12 |
| ITF M15 Karuizawa | 2023/05/28 01:15 | Seiya Nakanishi v Yua Taka | 4-6,2-6 |
| ITF M25 Kashiwa | 2023/04/02 00:30 | Jeremy Jin v Seiya Nakanishi | 6-3,6-2 |
| ITF M25 Tsukuba | 2023/03/27 00:30 | Seiya Nakanishi v Issei Okamura | 2-6,4-6 |
| Challenger Yokohama | 2022/10/30 02:35 | Seiya Nakanishi v Daisuke Sumizawa | 3-6,0-6 |