Overall, I’ve been quite satisfied with medical care in Kumamoto. Though I seldom use it myself, it was essential for the numerous 3:00 AM visits to the emergency room for my daughter’s asthma or the time my son stepped into a fumarole (hint: do not step into a fumarole). Recently, though, I had a medical problem, and the treatment was excellent and cheap: for a follow-up visit including an MRI, I paid 400 yen. But of course, I’ve been paying 70,000 yen for four people each month for decades.
JT has an informative article on medical issues for short-term residents. - William