A Japanese office worker steps into a compact, air-conditioned Do Hiemon Box cooler during intense summer heat.

Experience Japan’s Innovative Human Cooler, the Do Hiemon Box, Battling 40°C Heat

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Written by Sam Johnson

2026-08-04

Imagine stepping into a vending machine-sized refrigerator during a sweltering day. The Do Hiemon Box from Trusco, a Japanese brand, offers exactly that—a human-scaling cool-down device for $9,326.25.

In Japan, the term “Kokushobi” describes those oppressively hot days when temperatures soar above 40 degrees Celsius (100F). Enter the Do Hiemon Box, engineered to tackle such conditions by swiftly cooling your body within a mere five minutes.

Close-up of the Do Hiemon Box with temperature controls and cooling instructions visible.

How the Do Hiemon Box works

Modeled on a Japanese vending machine, the device invites you to sit on its integrated chair while air chilled to 5 degrees Celsius refreshes your head, neck, shoulders, and back. Inside, the temperature holds steady at 15 degrees. Five minutes inside, and you’ll feel the chill; by ten minutes, your core body temperature drops. After twenty minutes, it automatically powers down to prevent excessive cooling.

A versatile and energy-efficient solution

The Do Hiemon Box demands only about half the power of an air conditioner, operates on wheels, and is installation-free. This innovation has already found its place in over 130 sites since April, including factories and construction areas. Notably, Maebashi City Hall has made its unit accessible to the public at no cost.

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Frequently asked questions

How much does the Do Hiemon Box cost?

The Do Hiemon Box from Trusco costs $9,326.25.

What temperature is it inside the Do Hiemon Box?

Inside the Do Hiemon Box, the temperature holds steady at 15 degrees Celsius.

Where has the Do Hiemon Box been installed?

The Do Hiemon Box has been installed in over 130 sites, including factories, construction areas, and Maebashi City Hall.