You can get AGA medicine such as Propecia in Tokyo, Japan. You do not have to have a medical insurance. Just go to AGA clinic and register. No ID is required. Meet Dr. and tell him you need one. If you are using other medicine, you have to discuss with the Dr. Go back to the cashier and pay. Done.
Shibuya, Tokyo: Shibuya West Clinic
Shinjuku, Tokyo: Shinjuku West Clinic