Round: 62 Ground: Hardcourt outdoor
| ITF Japan F2 | 2018/03/12 00:30 | Soichiro Moritani v Masaki Osafune | 7-6,6-0 |
| ITF Japan F1 | 2018/03/06 01:00 | Naru Shirafuji v Masaki Osafune | 6-0,6-3 |
| ITF Japan F1 | 2018/03/03 04:30 | Cheong Hwi Kim v Masaki Osafune | 1-6,1-6 |
| Challenger Kyoto Qual | 2018/02/18 06:05 | Masaki Osafune v Takuto Niki | 3-6,2-6 |
| Challenger Toyota Qual | 2017/11/11 02:15 | Yuto Sakai v Masaki Osafune | 7-6,1-6,6-1 |
| ITF Guam F1 | 2017/06/22 03:25 | Masaki Osafune v Yuichi Ito | 2-6,4-6 |
| ITF Guam F1 | 2017/06/20 06:00 | Masaki Osafune v Steven Goh | 6-3,6-4 |
| ITF Japan F7 | 2017/06/06 04:05 | Renta Tokuda v Masaki Osafune | 6-1,3-6,6-1 |
| ITF India F4 | 2018/03/20 08:00 | Yu Hsiang Chiu v Anirudh Chandrasekar | 7-6,5-7,5-7 |
| ITF India F3 | 2018/03/14 04:00 | Sidharth Rawat v Yu Hsiang Chiu | 6-4,7-6 |
| ITF India F3 | 2018/03/13 05:45 | Yu Hsiang Chiu v Lance-Pierre Du Toit | 6-7,6-2,7-5 |
| ITF India F2 | 2018/03/04 04:30 | Yu Hsiang Chiu v Nicholas Bybel | 1-6,4-6 |
| ITF India F2 | 2018/03/03 04:00 | Yu Hsiang Chiu v Anurag Agarwal | 6-3,6-1 |
| ITF China F3 | 2018/01/24 05:55 | Yu Hsiang Chiu v Tsung-Hua Yang | 0-6,3-6 |
| ITF China F3 | 2018/01/23 04:20 | Yu Hsiang Chiu v Chukang Wang | 6-3,6-3 |
| ITF China F2 | 2018/01/16 06:15 | Yu Hsiang Chiu v Bruno Mardones | 7-5,4-6,6-7 |