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A heat-exposed worker wearing an air-conditioned jacket which has cooling fans on its back, works at the top of an under construction apartment building in Tokyo. File
| Photo Credit: Reuters
Blistering temperatures rising to 40C and above will now be branded “cruelly hot” or “kokusho-bi” in Japan, the weather agency said on Friday (April 17, 2026), as heatwave days become increasingly frequent in the region.
By using this designation, the Japan Meteorological Agency (JMA) “will more effectively call for vigilance against extremely high temperatures”, it said.
Published – April 17, 2026 03:26 pm IST
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‘Cruelly hot’: Japan devises new term for heatwave days
