I am only giving Sanno Byoin 3.5 because of the LONG wait times. The nurses and doctors are courteous & professional with the exception of one male doctor.
Be prepared to wait for up to an hour for an appointment. You should also be prepared to wait up to 30-30 minutes to pay on the 1ST floor and to receive medication.
I find some of the receptionists to be a bit silly and unprofessional at times but it isn't excessively, bad behaviour.
It is EXTREMELY expensive as well.
The place to be if you have an emergent situation. Red Cross is about taking care of people from all around the world. The nurses were professional and caretaking, the doctor was an expert in his field. The only down-side was the nutritionist who was overzealous, even going through my garbage to see what I was eating.