| UTR - Série Pro - Kawaguchi | 2024/03/08 03:30 | Masaya Kobayashi v Haruki Katsushima | 2-6,1-6 |
| UTR - Série Pro - Kawaguchi | 2024/03/07 01:00 | Masaya Kobayashi v Yuto Miyagawa | 6-2,6-4 |
| UTR - Série Pro - Kawaguchi | 2024/03/04 23:30 | Masaya Kobayashi v Hiiro Sakamoto | 5-7,5-7 |
| ITF - M15 Karuizawa | 2019/05/27 00:00 | Masaya Kobayashi v Jake Delaney | 0-6,5-7 |
| Kofu, Qualifications Simples M-ITF-JPN-03A | 2019/03/18 00:30 | Masaya Kobayashi v Takeshima, Shunrou | 2-6,1-6 |
| ITF - M15 Nishi-Tokyo | 2019/03/12 01:00 | Kikuchi, Gengo v Masaya Kobayashi | 4-6,7-5,10-6 |
| ITF - M15 Nishi-Tokyo | 2019/03/11 02:00 | Masaya Kobayashi v Yu, Cheng-Yu | 6-2,6-2 |
| ITF Japan F8 | 2018/06/13 01:00 | Kikuchi, Gengo v Masaya Kobayashi | 6-0,6-1 |
| UTR - Série Pro - Kawaguchi | 2024/03/08 03:30 | Taisei Miyamoto v Yuki Karatsu | 6-4,6-2 |
| UTR - Série Pro - Kawaguchi | 2024/03/07 02:30 | Natsuki Yamamoto v Yuki Karatsu | 6-0,5-0 |
| UTR - Série Pro - Kawaguchi | 2024/03/04 07:43 | Yusuke Yoshikawa v Yuki Karatsu | 6-4,6-2 |
| UTR - Série Pro - Kawaguchi | 2024/03/04 01:30 | Yuki Karatsu v Oliver Welch | 6-3,6-4 |
| UTR - Série Pro - Kawaguchi | 2024/03/03 04:34 | Ryoto Tachi v Yuki Karatsu | 6-0,7-6 |
| UTR - Série Pro - Kawaguchi | 2024/03/02 01:00 | Sota Tani v Yuki Karatsu | 2-6,1-6 |
| UTR Pro Miki | 2023/02/11 02:00 | Yuji Arimura v Yuki Karatsu | 6-3,7-6 |
| UTR Pro Miki | 2023/02/09 05:00 | Yuki Karatsu v Lennon Jones | 0-6,0-6 |