If you get ill: pharmacies, clinics, insurance

For something minor, start at a pharmacy. Look for the green cross; most stay open into the evening on weekdays.
Fewer open at weekends and late at night. Convenience stores carry a limited range — fever, indigestion and some cold medicine.
For a doctor, a neighbourhood clinic is fastest. Your passport is enough, and as a visitor you pay the uninsured fee on the spot.
For emergencies, call 119 or go straight to an emergency room. Nobody asks about your nationality or insurance first.
Travel insurance has to be bought before you leave. Keep the receipt and the doctor's note; you claim after you get home.
1339 and 1330 both take calls in English, Japanese and Chinese. They will tell you which hospital to go to.