Stadium: Court 6 Round: 54 Ground: Hardcourt outdoor
| ITF M15 Mornington | 2019/03/28 00:50 | Rinky Hijikata v Kazuma Kawachi | 6-1,6-4 |
| ITF M15 Mornington | 2019/03/25 23:00 | Kazuma Kawachi v Mustafa Ibraimi | 6-2,6-4 |
| ITF M15 Mornington | 2019/03/24 23:00 | Kazuma Kawachi v Sam Ryan Ziegann | 6-2,6-1 |
| ITF M15 Mornington | 2019/03/21 01:45 | Christopher O'Connell v Kazuma Kawachi | 6-2,6-2 |
| ITF M15 Mornington | 2019/03/20 02:15 | Brandon Walkin v Kazuma Kawachi | 6-3,3-6,4-6 |
| ITF M15 Mornington | 2019/03/19 01:25 | Kazuma Kawachi v Erik Holt-Crossman | 6-4,6-4 |
| ITF M15 Mornington | 2019/03/17 23:00 | Kazuma Kawachi v Cade Birrell | 6-1,6-3 |
| ITF M15 Nishi-Tama | 2019/03/05 03:00 | Cheng-Yu Yu v Kazuma Kawachi | 7-6,4-6,10-5 |
| ITF M25 Matsuyama | 2019/04/08 06:00 | Hayato Kudo v Tomohiro Masabayashi | 1-6,2-6 |
| ITF M15 Tsukuba | 2019/03/25 04:45 | Bart Stevens 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 |
| ITF M15 Kofu | 2019/03/20 02:25 | Naoki Tajima v Tomohiro Masabayashi | 4-6,6-1,6-2 |
| ITF M15 Kofu | 2019/03/18 05:30 | Tomohiro Masabayashi v Wei-De Lin | 6-1,6-2 |
| ITF M15 Kofu | 2019/03/18 00:30 | Daniil Zarichanskiy v Tomohiro Masabayashi | 1-6,3-6 |
| ITF M15 Nishi-Tama | 2019/03/08 04:10 | Shintaro Imai v Tomohiro Masabayashi | 6-3,6-2 |
| ITF M15 Nishi-Tama | 2019/03/08 01:00 | Taisei Ichikawa v Tomohiro Masabayashi | 6-4,1-6,2-6 |