Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF Japan F8 | 2018/06/14 01:00 | Hikaru Shiraishi v Ryota Tanuma | 2-6,4-6 |
| UTR Pro Noda | 2023/10/22 00:00 | Sora Fukuda v Ryota Tanuma | 6-2,6-1 |
| UTR Pro Noda | 2023/10/21 00:00 | Taketo Takamisawa v Ryota Tanuma | 5-7,6-1,3-6 |
| UTR Pro Noda | 2023/10/20 00:00 | Hiiro Sakamoto v Ryota Tanuma | 0-6,2-6 |
| UTR Pro Noda | 2023/10/19 02:57 | Ziga Svec v Ryota Tanuma | 2-6,2-6 |
| UTR Pro Noda | 2023/10/17 03:35 | Christopher Kosei Ono v Ryota Tanuma | 2-6,2-6 |
| UTR Pro Noda | 2023/10/16 03:30 | Ryota Tanuma v Kusunoki Haruto | 6-0,5-2 |
| 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 Cairns | 2023/10/13 01:00 | Jake Delaney v Hikaru Shiraishi | 6-3,6-7,7-6 |
| ITF M25 Cairns | 2023/10/12 00:00 | Hikaru Shiraishi v Scott Jones | 6-1,4-6,6-4 |
| ITF M25 Cairns | 2023/10/11 01:25 | Hikaru Shiraishi v Corban Crowther | 4-6,6-4,6-2 |
| ITF M25 Cairns | 2023/10/03 04:00 | Hikaru Shiraishi v Blake Mott | 6-4,1-6,3-6 |
| ITF M25 Takasaki | 2023/09/22 01:00 | Naoki Nakagawa v Hikaru Shiraishi | 1-6,6-0,7-5 |
| ITF M25 Takasaki | 2023/09/21 03:30 | Hikaru Shiraishi v Taisei Ichikawa | 6-3,6-1 |
| ITF M25 Takasaki | 2023/09/20 06:45 | Kazuma Kawachi v Hikaru Shiraishi | 3-6,3-6 |
| ITF M25 Sapporo | 2023/09/16 01:00 | Shuichi Sekiguchi v Hikaru Shiraishi | 6-2,4-6,6-3 |