LIPOSONLINE.COM – Japan is currently being hit by an extreme heatwave.
Several regions are forecast to record temperatures of up to 40 degrees Celsius, prompting authorities to issue serious warnings about the risk of heatstroke.
Temperatures Expected to Hit 40°C in Kumagaya and Nagoya
According to the Japan Meteorological Agency (JMA), the hottest areas will be Kumagaya north of Tokyo and Nagoya in central Japan. Both cities are predicted to reach 40°C in the coming days.
This marks the second consecutive day that Japan has experienced what is now being called “kokushobi”. The new term is used to describe days when the maximum temperature reaches 40°C or higher.
Government Advisory: Use Air Conditioning and Stay Hydrated
Quoted from Reuters, local authorities have urged residents to use air conditioning, drink plenty of fluids, and avoid prolonged outdoor activities.
The warning comes amid a clear trend of rising summer temperatures in Japan in recent years. In 2024, the country recorded its highest temperature ever at 41.8°C in Isesaki City, Gunma Prefecture.
Impact: Thousands Hospitalized, 7 Fatalities
The effects of the extreme heat are already being felt. The latest data from the Japan Fire and Disaster Management Agency shows that between July 6 and 12, 2026, a total of 4,580 people were taken to hospital due to heatstroke. Of those, 7 people died.
The situation was even worse last summer. In 2025, more than 100,000 people across Japan required hospital treatment for heatstroke.
New Term “Kokushobi” Reflects Climate Crisis
This year, the JMA officially introduced the term kokushobi to classify days with extreme maximum temperatures.
The move reflects how frequently Japan is now experiencing severe heat.
The public is advised to watch for symptoms of heatstroke, especially during outdoor activities. Prolonged exposure to extreme heat can cause significant fluid and electrolyte loss.
In severe cases, body temperature can rise sharply and lead to impaired consciousness or organ failure.
Authorities continue to urge citizens to monitor weather updates and seek immediate medical attention if they experience dizziness, nausea, fatigue, or confusion due to heat exposure.
