Honestly, I think it is best if you find a professional or certified medical interpreter in your region or ask the doctor for it. I am not sure if you have to pay (hopefully not) and how much it would cost.You shouldn't ask random people on the internet to help you translate something medical because you cannot guarantee their accuracy and it is your health on the line. Interpreters working in a medical field have received proper training to deliver accurate messages. Plus, the doctor will probably give you medicine and want to explain things to you in Japanese...