Stadium: Court 5 Round: 25 Ground: Hardcourt outdoor
| Matsuyama, Singles M-ITF-JPN-06A | 2019/04/10 03:30 | Niki, Takuto v Katayama, Sho | 6-2,6-3 |
| Kofu, Qualifications Simples M-ITF-JPN-03A | 2019/03/21 04:40 | Niki, Takuto v Katayama, Sho | 4-6,7-6,6-4 |
| Kofu, Qualifications Simples M-ITF-JPN-03A | 2019/03/20 07:15 | Seita Watanabe v Katayama, Sho | 3-6,2-6 |
| ITF - M15 Nishi-Tokyo | 2019/03/12 03:20 | Ryota Tanuma v Katayama, Sho | 6-4,2-6,10-5 |
| ITF - M15 Nishi-Tokyo | 2019/03/11 01:00 | Tange, Shota v Katayama, Sho | 3-6,3-6 |
| Nishi-Tama, Simples M-ITF-JPN-01A | 2019/03/07 04:00 | Shintaro Imai v Katayama, Sho | 6-2,6-3 |
| Nishi-Tama, Simples M-ITF-JPN-01A | 2019/03/06 02:25 | Katayama, Sho v Kawahashi, Yuta | 6-3,6-1 |
| Nishi-Tama, Simples M-ITF-JPN-01A | 2019/03/05 03:00 | Katayama, Sho v Kawahashi, Yuta | 4-6,5-7 |
| ITF - M15 Karuizawa | 2019/05/28 02:30 | Tomohiro Masabayashi v Moritani, Soichiro | 3-6,3-6 |
| Matsuyama, Singles M-ITF-JPN-06A | 2019/04/12 03:00 | Wishaya Trongcharoenchaikul v Tomohiro Masabayashi | 7-5,6-2 |
| Matsuyama, Singles M-ITF-JPN-06A | 2019/04/10 05:25 | Taketo Takamisawa v Tomohiro Masabayashi | 3-6,3-6 |
| Matsuyama, Singles M-ITF-JPN-06A | 2019/04/09 01:00 | Kazuma Kawachi v Tomohiro Masabayashi | 5-7,6-4,3-10 |
| Matsuyama, Singles M-ITF-JPN-06A | 2019/04/08 06:00 | Kudo, Hayato v Tomohiro Masabayashi | 1-6,2-6 |
| ITF - M15 Tsukuba | 2019/03/25 04:45 | Stevens, Bart v Tomohiro Masabayashi | 6-7,6-3,10-3 |
| ITF - M15 Tsukuba | 2019/03/25 01:00 | Takuya Kumasaka v Tomohiro Masabayashi | 3-6,4-6 |
| Kofu, Qualifications Simples M-ITF-JPN-03A | 2019/03/20 02:25 | Naoki Tajima v Tomohiro Masabayashi | 4-6,6-1,6-2 |