Stadium: C.2 Round: 27 Ground: Synthetic outdoor
| ITF M15 Akishima | 2019/06/13 02:45 | Haru Inoue v Ryohei Tagata | 6-4,3-6,2-6 |
| ITF M15 Akishima | 2019/06/12 01:00 | Ryohei Tagata v Kenta Kurita | 6-2,6-3 |
| ITF M15 Tsukuba | 2019/03/28 02:10 | Ryohei Tagata v Takuto Niki | 3-6,6-2,7-5 |
| ITF M15 Tsukuba | 2019/03/26 01:00 | Ryohei Tagata v Yuta Kawahashi | 4-6,6-2,6-1 |
| ITF Japan F4 | 2018/03/27 02:30 | Ryohei Tagata v Yuta Shimizu | 4-6,4-6 |
| ITF Japan F3 | 2018/03/17 04:00 | Ryohei Tagata v Masaki Sasai | 5-7,6-3,2-6 |
| ITF Japan F3 | 2018/03/17 00:30 | Ryohei Tagata v Takuya Kumasaka | 6-0,6-2 |
| ITF Japan F4 | 2017/03/25 01:00 | Katsuki Nagao v Ryohei Tagata | 2-6,6-2,6-0 |
| ITF M15 Akishima | 2019/06/13 01:00 | Kosuke Okagaki v Sho Katayama | 3-6,3-6 |
| ITF M15 Akishima | 2019/06/12 01:00 | Sho Katayama v Kento Takeuchi | 6-0,6-4 |
| ITF M15 Guam | 2019/06/07 01:35 | Sho Katayama v Hiroyasu Ehara | 3-6,4-6 |
| ITF M15 Guam | 2019/06/06 00:00 | Sho Katayama v Naoki Takeda | 7-6,6-1 |
| ITF M15 Guam | 2019/06/04 01:55 | Sho Katayama v Tomohiro Masabayashi | 6-4,7-6 |
| ITF M25 Matsuyama | 2019/04/10 03:30 | Takuto Niki v Sho Katayama | 6-2,6-3 |
| ITF M15 Kofu | 2019/03/21 04:40 | Takuto Niki v Sho Katayama | 4-6,7-6,6-4 |
| ITF M15 Kofu | 2019/03/20 07:15 | Seita Watanabe v Sho Katayama | 3-6,2-6 |