Stadium: Court 2 Round: 27 Ground: Clay
| ITF Japan F5 MD | 2018/04/02 07:40 | Ehara/Katayama v Chiu/Grills | 6-4,6-0 |
| ITF Japan F3 MD | 2018/03/23 02:45 | Seol/Song v Ehara/Katayama | 5-7,6-7 |
| ITF Japan F3 MD | 2018/03/23 01:30 | Kikuchi/Takeshima v Ehara/Katayama | 6-7,5-7 |
| ITF Japan F3 MD | 2018/03/22 09:10 | Lee/Lim v Ehara/Katayama | 6-7,3-6 |
| ITF Japan F3 MD | 2018/03/19 07:55 | Hashikawa/Oku v Ehara/Katayama | 4-6,3-6 |
| ITF Japan F2 MD | 2018/03/13 06:55 | Lee/Lim v Ehara/Katayama | 7-6,3-6,10-8 |
| Challenger Yokohama Qual MD | 2018/02/25 04:00 | Ehara/Katayama v Donati/Leshem | 6-7,3-6 |
| ITF China F14 MD | 2017/07/28 07:00 | Huang/Wang v Ehara/Katayama | 3-6,3-6 |
| ITF Japan F5 MD | 2018/04/02 05:00 | Takeshima/Tanuma v Fujii/Ochi | 6-4,5-7,10-12 |