Minami is a very helpful and friendly host - unfortunately the room was a dirty when we checked in but she responded right away and had it cleaned the next morning.
The room is connected to another via a sliding door that’s fixed shut, however there are gaps that allow sound/air to travel through. If you want a completely separate space/room i’d suggested booking the 3rd floor room which is completely sealed off and has it’s own bathroom.
This was my 2nd stay with Minami and I would happily stay at her again if I was visiting Tokyo.