It says "non-japanese ok" here: https://www.purelovers.com/kanto/shop/4869/
But if you don't speak Japanese, you might have trouble getting an appointment since you need to make a phone call. The mail form is only for recruitment purpose it seems.
Most of the reviews of this shop are positive, FYI.
Mosty say the girls are not so different from the pictures, service is good (I mean submissive/passive due to the concept of this shop)
Major complain is they occasionally give you sales call.