Stadium: Court 1 Round: 45 Ground: Hardcourt outdoor
| ITF Japan F8 | 2018/06/13 01:00 | Kikuchi, Gengo v Masaya Kobayashi | 6-0,6-1 |
| ITF Japan F8 | 2018/06/11 00:30 | Masaya Kobayashi v Azuma, Ryuhei | 6-0,7-5 |
| ITF Japan F8 | 2018/06/09 05:10 | Masaya Kobayashi v Taisei Miyamoto | 6-3,6-3 |
| ITF Japan F8 | 2018/06/09 01:00 | Masaya Kobayashi v Goh, Steven | 3-6,6-3,6-0 |
| ITF Japan F7 Qual | 2018/06/02 01:00 | Masaya Kobayashi v Shimizu, Kazuki | 6-7,3-6 |
| ITF Japan F6 Qual | 2018/04/08 04:00 | Kishi, Ryota v Masaya Kobayashi | 6-2,6-1 |
| ITF Japan F3 | 2018/03/19 02:15 | Masaya Kobayashi v Saito, Takashi | 6-4,4-6,6-4 |
| ITF Japan F2 | 2018/03/12 02:30 | Takeuchi, Kento (1987) v Masaya Kobayashi | 6-3,4-6,6-3 |
| Nishi-Tama, Simples M-ITF-JPN-01A | 2019/03/06 05:05 | Wishaya Trongcharoenchaikul v Yu, Cheng-Yu | 6-4,7-6 |
| Nishi-Tama, Simples M-ITF-JPN-01A | 2019/03/05 03:00 | Yu, Cheng-Yu v Kazuma Kawachi | 7-6,4-6,10-5 |
| Nishi-Tama, Simples M-ITF-JPN-01A | 2019/03/05 01:00 | Yu, Cheng-Yu v Kumthonkittikul, W. | 6-3,6-4 |
| ITF Thailand F9 | 2018/11/15 03:00 | Yu, Cheng-Yu v Kravchuk, Konstantin | 0-6,5-7 |
| ITF Thailand F9 | 2018/11/14 05:00 | Yu, Cheng-Yu v Mulada, Tonkla | 6-3,6-4 |
| ITF Thailand F9 | 2018/11/13 08:50 | Smilansky, Igor v Yu, Cheng-Yu | 4-6,1-6 |
| ITF Thailand F9 | 2018/11/12 02:00 | Yu, Cheng-Yu v Yeongseok Jeong | 4-6,6-3,6-4 |
| ITF Thailand F9 | 2018/11/11 02:00 | Yu, Cheng-Yu v Ray Ho | 6-2,4-6,7-6 |