Tokyo, Japan: To combat an increasingly hot summer, Japan has developed a new personal cooling device called the Do Hiemon Box—a one-person “human refrigerator” to cool the body in just minutes in high heat.
The small cooling chamber allows an individual to step inside and experience a dramatic drop in body temperature due to chilled air circulation and advanced cooling technology. This device is part of Japan’s effort to take on what the country’s growing attention to the health risks associated with excessive heat (long periods of high temperature exposure and frequent heat waves) is leading to.
🚨 Japan unveils the Do Hiemon Box, a one-person "human refrigerator" that cools the body within minutes in summer heat. 🤯 pic.twitter.com/gPVN7cz4au
— Indian Tech & Infra (@IndianTechGuide) July 28, 2026
Japan has experienced record-breaking summer temperatures in recent years, with heat-related illnesses becoming an increasing public health problem. Elderly people, outdoor workers, emergency responders, and athletes are among the most vulnerable to heat stress—a challenge researchers and companies are struggling to combat.
The Do Hiemon Box is designed for brief relief by cooling the user's body in only a few minutes. Unlike old air conditioners that cool the entire room, the Do Hiemon Box is focused on the individual and is therefore energy-efficient and very effective at short-term cooling.
The enclosed room is large enough for a single person and has many cooling mechanisms to circulate cold air all around the body. Users can enter the chamber after spending some time outdoors in the high-temperature environment, which reduces core body temperature faster than resting in the air-conditioned area.
Local cooling technologies such as the Do Hiemon Box could potentially reduce the risk of heat exhaustion and heatstroke, especially as global temperatures are increasing due to climate change. These technologies could be implemented in workplaces, sports facilities, hospitals, construction sites, transport hubs, and public places where people are exposed to intense heat.
Japan has long been a pioneer in finding practical technological solutions to everyday challenges. From wearable cooling fans and cooling jackets to advanced climate-control systems, the country is investing in innovations to better public health and comfort during the hot summer months.
The launch of the Do Hiemon Box comes as many regions in Asia experience extended periods of extreme heat. It is well known that governments and health agencies have been stressing and telling citizens to stay hydrated, not to go outdoors in the afternoon (especially during peak hours), and to stay in a cool place whenever possible.
While the Do Hiemon Box is still a relatively new concept, it has already drawn much attention for its unique approach to personal cooling. Scientists believe similar technologies could become increasingly common in countries with more frequent and severe heatwaves.
As climate conditions change and the demand for effective heat mitigation grows, new technologies like the Do Hiemon Box show how technology can be used to protect public health. The one-person cooling chamber is another step in adapting to a warming world (for work, for public facilities, for emergency response).
