Japan’s government has enforced new workplace heat safety laws in response to a sharp rise in heatstroke-related deaths.
A revised ordinance took effect on June 1, requiring businesses to take action when workers face dangerous heat exposure. Companies must respond when work exceeds 60 consecutive minutes or four hours in environments above 31°C, or when the Wet Bulb Globe Temperature (WBGT) surpasses 28°C.
The Ministry of Health, Labor and Welfare issued strong penalties for violations. Employers who fail to follow the rules could face up to six months in jail or a fine of 500,000 yen.
The law comes after Japan experienced one of its hottest summers ever. In 2024 alone, 31 workers died from heatstroke, with total workplace heat-related injuries reaching a record 1,257.
Workplace heat safety in Japan is now more than a guideline—it’s a legal responsibility. Companies must assign someone at each site to monitor symptoms and take immediate action. That includes stopping work, cooling the affected person, and calling for medical help. Employers must also educate workers about these steps.
A review of 103 workplace heatstroke deaths from 2020 to 2023 showed that 70% occurred outdoors. In most of those cases, symptoms were detected too late. In 41 incidents, responses were found inadequate.
Attorney Taku Furukawa, an expert in heatstroke compensation cases, said the law focuses too much on detection and not enough on prevention. “Reducing exposure and adjusting work schedules is key,” he said. “You can’t wait for symptoms to act.”
He urged businesses to go beyond compliance by evaluating physical task intensity, work duration, and environmental risk.
With temperatures rising annually, workplace heat safety in Japan is now a crucial issue for labor rights, public health, and corporate responsibility. Companies must act before tragedy strikes again.
