Japan
22.09.97, 26 years
22.09.97, 26 years
Country
Birthdate
Height
Weight
Profi since
Play
Ranking's position
Points
Prize money
Birthdate
Height
Weight
Profi since
Play
Ranking's position
Points
Prize money
Japan
07.03.95, 29 years
07.03.95, 29 years
Masaya Kobayashi vs. Masaki Osafune - H2H matches
| 20.03.17 | q 1 | Masaya Kobayashi | Masaki Osafune | 7-64, 6-73, 6-4 | match details |  Japan F3 | Hard |
Masaya Kobayashi form & Masaki Osafune form
Masaya Kobayashi - last matches
| M15 Karuizawa - Clay | ||||
| 26.05.19 q 1 | vs. Jake Delaney | 0-6, 5-7 |  | match details |
| M15 Kofu - Hard | ||||
| 17.03.19 q 1 | vs. Shunrou Takeshima | 2-6, 1-6 | | match details |
| M15 Nishi - Hard | ||||
| 12.03.19 qual. | vs. Gengo Kikuchi | 6-4, 5-7, 6-10 | | match details |
| 10.03.19 q 1 | vs. Ching-Mou Yu | 6-2, 6-2 |  | match details |
| Japan F8 - Carpet | ||||
| 12.06.18 1st round | vs. Gengo Kikuchi | 0-6, 1-6 | | match details |
| 11.06.18 qual. | vs. Ryuhei Azuma | 6-0, 7-5 | | match details |
| 09.06.18 q 2 | vs. Taisei Miyamoto | 6-3, 6-3 | | match details |
| 09.06.18 q 1 | vs. Steven Goh | 3-6, 6-3, 6-0 | | match details |
| Japan F7 - Clay | ||||
| 02.06.18 q 1 | vs. Kazuki Shimizu | 6-76, 3-6 | | match details |
| Japan F6 - Hard | ||||
| 08.04.18 q 2 | vs. Ryota Kishi | 2-6, 1-6 | | match details |
| 07.04.18 q 1 | vs. Kaito Muranishi | 7-5, 6-3 | | match details |
| Japan F3 - Hard | ||||
| 21.03.18 2nd round | vs. Min-Kyu Song | 1-6, - Masaya Kobayashi - retired | | match details |
| 19.03.18 1st round | vs. Takashi Saito | 6-4, 4-6, 6-4 | | match details |
| Japan F2 - Hard | ||||
| 12.03.18 1st round | vs. Kento Takeuchi | 3-6, 6-4, 3-6 | | match details |
| Japan F1 - Hard | ||||
| 05.03.18 qual. | vs. Gengo Kikuchi | 2-6, 5-7 | | match details |
| 04.03.18 q 2 | vs. Tomohiro Masabayashi | 6-1, 3-6, 7-5 | | match details |
| 03.03.18 q 1 | vs. Masahiro Fukuda | 6-2, 6-2 | | match details |
 Turkey F7 - Hard | ||||
| 21.02.18 1st round | vs. Attila Balazs | 1-6, 3-6 | | match details |
| 19.02.18 qual. | vs. Bogdan Ionut Apostol | 4-6, 6-3, 4-6 | | match details |
| 18.02.18 q 2 | vs. Michiel De Krom | 6-2, 6-1 | | match details |
| 17.02.18 q 1 | vs. Dmitry Myagkov | 6-2, 6-3 | | match details |
| Turkey F6 - Hard | ||||
| 12.02.18 qual. | vs. Sho Shimabukuro | 7-66, 3-6, 2-6 | | match details |
| 11.02.18 q 2 | vs. Felipe Meligeni Alves | 6-2, 6-1 | | match details |
| 10.02.18 q 1 | vs. Mert Alkaya | 6-3, 6-3 | | match details |
 Hong Kong - Hard | ||||
| 03.01.18 2nd round | vs. Shintaro Imai | 3-6, 0-6 | | match details |
| 01.01.18 1st round | vs. Chien-Hsun Lo | 6-3, 5-2, Chien-Hsun Lo - retired | | match details |
| 31.12.17 qual. | vs. Andrea Bessire | 7-5, 6-0 | | match details |
| 30.12.17 q 1 | vs. Tsung-Hao Huang | 7-64, 6-4 | | match details |
| Hong Kong - Hard | ||||
| 26.12.17 1st round | vs. Shintaro Imai | 1-6, 1-6 | | match details |
| 24.12.17 qual. | vs. Soichiro Moritani | 6-2, 6-2 | | match details |
Masaki Osafune - last matches
| Japan F5 - Hard | ||||
| 01.04.18 qual. | vs. Yu Hsiang Chiu | 2-6, 2-6 | | match details |
| 31.03.18 q 1 | vs. Shunsuke Wakita | 6-77, 6-3, 6-0 | | match details |
| Japan F4 - Hard | ||||
| 25.03.18 q 2 | vs. Yu Hsiang Chiu | 2-6, 4-6 | | match details |
| 24.03.18 q 1 | vs. Shion Hotta | 6-0, 6-0 | | match details |
| Japan F2 - Hard | ||||
| 12.03.18 qual. | vs. Soichiro Moritani | 6-75, 0-6 | | match details |
| 11.03.18 q 2 | vs. Tomoya Ikeda | 6-1, 6-2 | | match details |
| Japan F1 - Hard | ||||
| 06.03.18 qual. | vs. Naru Shirafuji | 0-6, 3-6 | | match details |
| 04.03.18 q 2 | vs. Taiga Shioya | 6-2, 6-4 | | match details |
| 03.03.18 q 1 | vs. Cheong Hwi Kim | 6-1, 6-1 | | match details |
| Kyoto Challenger - Carpet | ||||
| 18.02.18 q 2 | vs. Takuto Niki | 3-6, 2-6 | | match details |
| 17.02.18 q 1 | vs. Tomoya Fujiwara | 6-72, 6-3, 6-4 | | match details |
| Toyota Challenger - Carpet | ||||
| 11.11.17 q 1 | vs. Yuto Sakai | 6-74, 6-1, 1-6 | | match details |
 Guam F1 - Hard | ||||
| 21.06.17 2nd round | vs. Yuichi Ito | 2-6, 4-6 | | match details |
| 20.06.17 1st round | vs. Steven Goh | 6-3, 6-4 | | match details |
| Japan F8 - Carpet | ||||
| 12.06.17 q 2 | vs. Daisuke Sumizawa | 1-6, 1-3, - Masaki Osafune - retired | | match details |
| 12.06.17 q 1 | vs. Hideo Asakura | 6-0, 6-1 | | match details |
| Japan F7 - Hard | ||||
| 06.06.17 1st round | vs. Renta Tokuda | 1-6, 6-3, 1-6 | | match details |
| 05.06.17 q 1 | vs. Mark Verryth | 6-4, 3-2, Mark Verryth - retired | | match details |
| 05.06.17 qual. | vs. Shoma Kato | 6-3, 6-3 | | match details |
| Japan F6 - Clay | ||||
| 29.05.17 q 1 | vs. Shoma Saito | 6-74, 6-1, 6-3 | | match details |
| 29.05.17 qual. | vs. Yuki Matsuo | 6-75, 2-6 | | match details |
 China F7 - Hard | ||||
| 17.05.17 2nd round | vs. Dayne Kelly | 1-6, 1-6 | | match details |
| 16.05.17 1st round | vs. Jui-Chen Hung | 6-2, 1-6, 6-2 | | match details |
| 15.05.17 q 1 | vs. Louis Clark | 6-1, 7-5 | | match details |
| 15.05.17 q 2 | vs. Calum Puttergill | 7-5, 6-1 | | match details |
| 15.05.17 qual. | vs. Chukang Wang | 5-7, 6-4, 6-1 | | match details |
| China F6 - Hard | ||||
| 08.05.17 1st round | vs. Yan Bai | 2-6, 2-6 | | match details |
| 08.05.17 q 1 | vs. Xiao Gong | 0-6, 6-4, 7-5 | | match details |
| 08.05.17 q 2 | vs. Liran Chen | 6-3, 6-3 | | match details |
| 08.05.17 qual. | vs. Kazuma Kawachi | 6-2, 6-4 | | match details |
