Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF M15 - Nishi-Tokyo | 2019/03/13 03:50 | Shintaro Imai v Naoki Tajima | 6-1,6-4 |
| ITF M15 Nishi-Tama | 2019/03/08 04:30 | Sho Shimabukuro v Naoki Tajima | 6-3,7-5 |
| ITF M15 Nishi-Tama | 2019/03/05 05:25 | Naoki Tajima v Shinji Hazawa | 7-5,6-3 |
| ITF M15 Anning | 2019/01/18 03:00 | Yan Bai v Naoki Tajima | 3-6,6-1,6-0 |
| ITF M15 Anning | 2019/01/17 03:00 | Naoki Tajima v Michael Zhu | 6-2,6-3 |
| ITF M15 Anning | 2019/01/15 02:00 | Naoki Tajima v Liran Chen | 6-2,6-1 |
| ITF M15 Anning | 2019/01/13 03:00 | Naoki Tajima v Agustin Velotti | 6-4,3-6,5-7 |
| ITF M15 Anning | 2019/01/12 03:00 | Naoki Tajima v Shao-Fan Liu | 2-6,6-1,6-3 |
| 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 |
| ITF M15 Nishi-Tama | 2019/03/06 02:55 | Kento Takeuchi v Tomohiro Masabayashi | 3-6,6-1,0-6 |
| ITF M15 Nishi-Tama | 2019/03/05 03:00 | Tomohiro Masabayashi v Yuichiro Inui | 6-2,6-1 |
| ITF M15 Nishi-Tama | 2019/03/05 01:00 | Li-Wei Tan v Tomohiro Masabayashi | 3-6,1-6 |
| ITF China F14 | 2018/08/27 09:10 | Weiqiang Zheng v Tomohiro Masabayashi | 7-6,6-1 |