Japan reveals new name for 40C-and-hotter days after blistering summer
After experiencing its hottest summer on record, Japan's Meteorological Agency (JMA) introduced "kokushobi," translated as "cruelly hot," "brutally hot," or "severely hot day," to describe days reaching 40C (104F) or higher. The term was selected as the most popular choice in a national online survey conducted in February and March with approximately 478,000 responses.

Briefing Summary
AI-generatedAfter experiencing its hottest summer on record, Japan's Meteorological Agency (JMA) introduced "kokushobi," translated as "cruelly hot," "brutally hot," or "severely hot day," to describe days reaching 40C (104F) or higher. The term was selected as the most popular choice in a national online survey conducted in February and March with approximately 478,000 responses. The new designation aims to categorize and communicate extreme heat events, which are becoming increasingly frequent and intense due to human activities. Japan already uses specific terms for days exceeding 25C, 30C, and 35C. The JMA's introduction of "kokushobi" highlights growing concerns about extreme weather in Japan.
Article analysis
Model · rule-basedKey claims
5 extractedThe description was introduced by Japan's Meteorological Agency (JMA) on Friday.
The name emerged as the most popular in a national online survey.
The term kokushobi has been translated as "cruelly hot", "brutally hot" or "severely hot" day.
Japan has unveiled a new name for days that reach 40C (104F) or above: kokushobi.
Extreme weather events like heatwaves are becoming more common and more intense around the world.