| ITF M25 Takasaki MD | 09/19 07:35 | - | Yuto Oki/Vithoontien v Kumasaka/Yamasaki | 6-2,6-3 | |
| ITF M25 Takasaki MD | 09/18 09:14 | - | Kumasaka/Yamasaki v Jayson Blando/Blando | 6-4,2-6,1-0 | |
| ITF M15 Osaka MD | 04/17 07:03 | - | Katayama/Kono v Kumasaka/Yamasaki | 6-3,3-6,1-0 | |
| ITF M15 Monastir MD | 04/30 12:25 | 26 | Kumasaka/Yamasaki v Birrell/Cook | 3-6,4-6 |