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Heatstroke in Japan: What to do (Kyoto & Okinawa summer tips)

Last updated: 2026-03-03

TL;DR (fast plan)

  • Heatstroke can become life-threatening. If someone is confused, collapses, or can’t cool down, call 119.
  • Prevention = avoid heat + hydrate + rest + cool your body.
  • In Kyoto and Okinawa, heat + humidity can be intense in summer—plan your day around the heat.

(This page provides general guidance, not medical diagnosis.)

Call 119 immediately (red flags)

Call 119 if the person has any of the following:

  • Confusion, unusual behavior, fainting, seizures
  • Trouble walking or cannot stand
  • Very hot skin, worsening condition, or not improving after cooling
  • Severe headache with vomiting, or severe weakness

First aid (what to do right now)

  1. Move to a cooler place (shade, air-conditioned room).
  2. Cool the body fast
    • Loosen clothing
    • Use cold towels/ice packs on neck/armpits/groin
    • Fan the body or use air conditioning
  3. Fluids
    • If fully awake and able to swallow: small sips of water or oral rehydration drink
    • If drowsy/confused or vomiting: do not force fluids—call 119
  4. Do not “walk it off.” If symptoms are moderate to severe, get help.

Prevention (Kyoto & Okinawa practical tips)

  • Time your sightseeing: do outdoor walking early morning / evening, and schedule indoor breaks mid-day.
  • Hydrate + salt: sip fluids frequently; consider drinks/snacks that replace salt when sweating heavily.
  • Use shade + cooling: parasol/hat, cooling towels, frequent breaks.
  • Dress smart: breathable, quick-dry clothing.
  • Use AC: don’t “endure” a hot room.

Check the heat risk (recommended)

Japan uses WBGT (heat stress index) and heat alerts. Before long walks, check the official WBGT/heat alert site for your area (Kyoto / Naha, etc.) and adjust your plan.

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