Japan temperatures soar over 40C, marking first 'cruelly hot day'
Japan has experienced its first "kokushobi," or "cruelly hot day," as temperatures surpassed 40C (104F) in three central cities: Tajimi, Gujo, and Toyoda. This new term was introduced in April by Japan's Meteorological Agency (JMA) to specifically warn the public about days reaching this dangerous temperature threshold.

Briefing Summary
AI-generatedJapan has experienced its first "kokushobi," or "cruelly hot day," as temperatures surpassed 40C (104F) in three central cities: Tajimi, Gujo, and Toyoda. This new term was introduced in April by Japan's Meteorological Agency (JMA) to specifically warn the public about days reaching this dangerous temperature threshold. The JMA anticipates the extreme heat will persist into next week. The country already uses terms for days exceeding 25C, 30C, and 35C, with "moshobi" denoting "extremely hot days" over 35C. The introduction of "kokushobi" highlights the increasing intensity of global extreme weather events.
Article analysis
Model · rule-basedKey claims
5 extractedJapan's highest recorded temperature was 41.8C in Isesaki last year.
Nearly 300 out of 914 observation points recorded 'moshobi' (extremely hot days) on Tuesday.
Temperatures reached 40C in Tajimi, Gujo, and Toyoda on Tuesday.
Japan experienced its first 'kokushobi' or 'cruelly hot day' as temperatures surpassed 40C.
Extreme weather events like heatwaves are becoming more intense globally.