| ITF M25 Takasaki MD | 09/16 04:00 | - | Adachi/Koyama v Yuto Oki/Vithoontien | 2-6,2-6 | |
| ITF M25 Sapporo MD | 09/10 04:40 | 26 | Adachi/Koyama v Kono/Ogura | 0-6,1-6 | |
| ITF M25 Sapporo MD | 09/04 07:00 | 26 | Isomura/Sueoka v Adachi/Koyama | 6-3,6-1 | |
| ITF M15 Tokyo MD | 07/09 07:25 | 26 | Adachi/Komagata v Adachi/Koyama | 7-6,6-1 |