Stadium: Court B Round: 44 Ground: Hardcourt outdoor
| ITF M15 Changwon | 2019/10/13 06:00 | Takuya Kumasaka v Samuel Beren | 6-4,6-3 |
| ITF M15 Karuizawa | 2019/05/30 01:00 | Kento Takeuchi v Takuya Kumasaka | 5-7,6-2,6-4 |
| ITF M15 Karuizawa | 2019/05/28 02:30 | Sota Fujii v Takuya Kumasaka | 4-6,4-6 |
| ITF M15 Tsukuba | 2019/03/25 01:00 | Takuya Kumasaka v Tomohiro Masabayashi | 3-6,4-6 |
| ITF M15 Kofu | 2019/03/21 02:00 | Takuya Kumasaka v Issei Okamura | 1-6,2-6 |
| ITF M15 Kofu | 2019/03/20 03:25 | Pol Wattanakul v Takuya Kumasaka | 6-3,1-6,3-6 |
| ITF M15 Nishi-Tama | 2019/03/05 07:00 | Takuya Kumasaka v Taisei Ichikawa | 1-6,5-7 |
| ITF Thailand F9 | 2018/11/11 06:00 | Wei-De Lin v Takuya Kumasaka | 6-4,2-6,7-6 |
| ITF M15 Anseong | 2019/06/26 04:00 | Hayeon Seong v Haru Inoue | 2-6,2-6 |
| ITF M15 Anseong | 2019/06/25 01:00 | Hayeon Seong v Sam Ryan Ziegann | 7-5,6-1 |
| ITF M15 Anseong | 2019/06/24 02:00 | David Barclay v Hayeon Seong | 7-5,6-7,8-10 |