Heatstroke in Japan

Heatstroke is a condition that arises from inadequate hydration and temperature regulation in hot environments, and special caution is needed, especially during Japan's hot summers. Below is a brief explanation of the characteristics of heatstroke in Japan and measures to combat it.


  1. High Heat and Humidity: Japan's summers are humid, making body temperature regulation challenging, and therefore, increasing the risk of heatstroke.
  2. Increase in Outdoor Activities: Opportunities to go outdoors for leisure activities or work increase in the summer, raising the risk of heatstroke.
  3. Risk to the Elderly: The elderly are particularly at risk as their ability to regulate body temperature declines.


  1. Hydration: Regularly take in fluids to prevent dehydration.
  2. Rest: Avoid long periods of outdoor activities or exercise and take breaks frequently.
  3. Spending Time in Cool Places: Utilize air conditioning or fans to ensure you spend time in cool places.
  4. Use of Hats and Parasols: Use hats or parasols to shield yourself from direct sunlight.
  5. Light Clothing: Wear breathable clothing to support temperature regulation.
  6. Check on the Elderly: Particular support for heatstroke prevention measures such as hydration and staying in cool places is needed for the elderly.

Heatstroke prevention is crucial, so practicing these measures daily and striving for health management during the summer months is essential.

Survey on "Heat in Japan" among foreigners who have visited Japan

According to a survey conducted by the Japan Weather Association,

  • 80% of foreign residents answered that summer in Japan is more unconfortable than in their own country because hot and humid.
  • More than 70% of those from foreign countries experienced heat stroke in Japan!
  • Of those who experienced heat stroke from abroad, 54% experienced "lethargy and nausea.
  • The most common symptoms appeared when they were "walking outdoors.
  • People from cold climate regions such as Russia and Ukraine tend to feel that Japan's summer is hot and humid more strongly than those from temperate climate regions like France and the United Kingdom.

Recently, , Northwestern China to southern Central Asia experienced abnormally high temperatures for the third consecutive week. Also, in Sapporo, Hokkaido, the daily mean temperature on the 29th was 29.7°C (normal: 22.7°C), and the daily maximum temperature was 34.4°C (normal: 27.0°C).