Stadium: Court 7 Round: 45 Ground: Hardcourt outdoor
| ITF - M15 Tsukuba | 2019/03/28 01:00 | Tanuma, Ryota v Shintaro Imai | 5-7,3-6 |
| ITF - M15 Tsukuba | 2019/03/26 01:00 | Aoran Wang v Tanuma, Ryota | 6-7,5-7 |
| Kofu, Qualifications Simples M-ITF-JPN-03A | 2019/03/23 02:55 | Jumpei Yamasaki v Tanuma, Ryota | 6-2,6-4 |
| Kofu, Qualifications Simples M-ITF-JPN-03A | 2019/03/22 02:00 | Issei Okamura v Tanuma, Ryota | 4-6,2-6 |
| Kofu, Qualifications Simples M-ITF-JPN-03A | 2019/03/21 04:15 | Tanuma, Ryota v Takeuchi, Kento (1987) | 6-4,6-4 |
| Kofu, Qualifications Simples M-ITF-JPN-03A | 2019/03/20 01:00 | Tanaka, Yunosuke v Tanuma, Ryota | 6-2,3-6,4-6 |
| ITF - M15 Nishi-Tokyo | 2019/03/14 01:00 | Tanuma, Ryota v Blake Ellis | 1-6,2-6 |
| ITF - M15 Nishi-Tokyo | 2019/03/13 05:55 | Kousuke Ogura v Tanuma, Ryota | 2-6,6-7 |
| ITF - M15 Tsukuba | 2019/03/25 04:30 | Veldheer, Mick v Tamaki Yamao | 6-1,6-3 |
| ITF - M15 Tsukuba | 2019/03/25 01:00 | Tamaki Yamao v Ng, Hao Yuan | 6-3,6-2 |
| Kofu, Qualifications Simples M-ITF-JPN-03A | 2019/03/21 02:00 | Ehara, Hiroyasu v Tamaki Yamao | 6-3,4-6,6-0 |
| Kofu, Qualifications Simples M-ITF-JPN-03A | 2019/03/20 01:00 | Tamaki Yamao v Look, Michael | 6-2,6-3 |
| Kofu, Qualifications Simples M-ITF-JPN-03A | 2019/03/18 06:30 | Tamaki Yamao v Yeung, Pak Long | 6-3,6-7,10-6 |
| Kofu, Qualifications Simples M-ITF-JPN-03A | 2019/03/18 03:00 | Ito, Yuichi v Tamaki Yamao | 2-6,3-6 |
| ITF - M15 Antalya | 2019/02/11 07:00 | Tamaki Yamao v Huertas Del Pino Cordova, Arklon | 6-7,6-7 |
| Challenger Kobe | 2018/11/10 03:35 | Tamaki Yamao v Naoki Tajima | 4-6,5-7 |