Japan's Innovative Cooling Solution for Workers

Aug 25, 2026

71 min

Aug 25, 2026 03:32

Cool Japan: Human fridge chills workers in extreme heat

## Introduction of the 'Human Fridge'

In response to Japan's increasingly severe summer heat, companies are investing in innovative cooling solutions. One such solution is the "Do Hiemon Box," a human-sized refrigerator designed to provide relief for workers exposed to extreme temperatures.

## Popularity and Adoption

Since its launch, over 300 units of the "Do Hiemon Box" have been sold by Trusco Nakayama, a Tokyo-based distributor. Priced at approximately $9,400, these cooling cabins are being adopted by construction sites, factories, and warehouses. There is potential for expansion into other areas like golf courses and baseball stadiums.

## Addressing Heat Challenges

Japan experienced its hottest summer on record in 2025, prompting the introduction of the term "kokushobi" to describe days when temperatures reach 40°C. The intense heat has led to numerous heat-related deaths and hospitalizations, highlighting the need for effective cooling measures.

## Legal and Workplace Changes

New regulations require Japanese businesses to provide heat-mitigating measures for employees, such as air-conditioned break rooms and cooling attire. The "Do Hiemon Box" offers a practical solution, operating on regular power and shutting off after 20 minutes to prevent overuse.

## Worker Experiences

Employees like Taichi Konishi have found the cooling box to be a valuable resource, using it multiple times a day to recover from the heat. The ability to quickly cool down has made a significant difference in their work environment, contributing to both comfort and safety.

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