| UTR Pro Noda | 2023/10/22 01:30 | Yuto Okuchi v Masaya Yufu | 6-3,6-2 |
| UTR Pro Noda | 2023/10/21 07:40 | Yuto Okuchi v Kusunoki Haruto | 6-3,4-6,6-1 |
| UTR Pro Noda | 2023/10/20 05:41 | Chaitanya Irkar v Yuto Okuchi | 4-6,6-3,3-5 |
| UTR Pro Noda | 2023/10/19 00:00 | Kazuma Kawachi v Yuto Okuchi | 6-4,6-7,6-0 |
| UTR Pro Noda | 2023/10/17 00:00 | Sota Tani v Yuto Okuchi | 7-6,3-6,6-4 |
| UTR Pro Noda | 2023/10/16 05:00 | Yuto Okuchi v Natsuki Yamamoto | 2-6,3-6 |
| UTR Pro Osaka | 2023/07/30 00:30 | Brody Nejedly-Krall v Yuto Okuchi | 4-6,6-6 |
| UTR Pro Osaka | 2023/07/28 00:30 | Yuto Okuchi v Jake Bhangdia | 0-6,6-7 |
| 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 |
| ITF M25 Sapporo | 2022/09/01 02:50 | Rio Noguchi v Seiya Nakanishi | 6-0,6-3 |