| ITF M25 Takasaki MD | 09/17 02:55 | 26 | Sumizawa/Tanuma v Hazawa/Taguchi | 5-7,6-2,5-10 | |
| ITF M25 Sapporo MD | 09/10 04:40 | 26 | Sumizawa/Tanuma v Perez/Thompkins | 1-6,7-5,5-10 | |
| ITF M15 Monastir MD | 09/30 12:55 | 27 | Collignon/Ouden v Sumizawa/Tanuma | 7-5,6-1 | |
| ITF M15 Monastir MD | 09/28 12:30 | 26 | Bathrinath/Nemakal v Sumizawa/Tanuma | 0-6,3-6 | |
| ITF M15 Monastir MD | 09/21 12:30 | 26 | Iradukunda/Sharipov v Sumizawa/Tanuma | 6-2,6-2 | |
| ITF M15 Gimcheon MD | 06/19 05:30 | 26 | Mendez/Thirouin v Sumizawa/Tanuma | 7-6,6-4 | |
| ITF Romania F12 MD | 08/29 14:00 | 26 | Sumizawa/Tanuma v Agamenone/Merino | 4-6,2-6 |