| ITF - M25 Takasaki | 2023/09/21 02:00 | Gage Brymer v Ryota Tanuma | 6-1,6-4 |
| ITF - M25 Takasaki | 2023/09/20 02:40 | Ryota Tanuma v Mitsuki Wei Kang Leong | 6-4,6-4 |
| ITF - M25 Sapporo | 2023/09/13 01:00 | Shuichi Sekiguchi v Ryota Tanuma | 7-6,6-1 |
| ITF - M25 Sapporo | 2023/09/07 00:50 | Kokoro Isomura v Ryota Tanuma | 6-4,6-3 |
| ITF - M25 Sapporo | 2023/09/05 02:00 | Ryota Tanuma v Yunseok Jang | 6-4,7-5 |
| Challenger - Matsuyama | 2022/11/06 01:00 | Ryota Tanuma v Naoki Nakagawa | 3-6,4-6 |
| Challenger - Yokohama | 2022/11/01 05:55 | Damir Dzumhur v Ryota Tanuma | 6-3,6-1 |
| Challenger - Yokohama | 2022/10/31 01:30 | Rimpei Kawakami v Ryota Tanuma | 6-7,6-4,4-6 |