Special Feature: "Practical! Recommendations for Heat Acclimatization to Prevent Heatstroke"
The May issue of "Koho Tokyo," a public relations magazine published by the Tokyo Metropolitan Government, features a special article promoting heat acclimatization to prevent heatstroke. It features cover art by manga artist Mari Yamazaki, introduces bathing methods and exercises by experts, and encourages starting these efforts from May.
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- 📰 Published: May 1, 2026 at 20:20
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The Tokyo Metropolitan Government publishes its public relations magazine "Koho Tokyo" on the first day of every month to convey necessary information for metropolitan administration and citizens' lives. The May issue features "Heat Acclimatization (shonetsu-junka) useful for heatstroke prevention," which should be started before the heat intensifies. This issue is identifiable by its cover, featuring manga artist Mari Yamazaki's "Thermae Romae Zoku." In addition to newspaper inserts, it is available at metropolitan and municipal facilities. Please pick up a copy and read it.
WEB version: https://www.koho.metro.tokyo.jp/
●Special Feature Contents
●Let's Start Before the Heat Intensifies: Practical! Recommendations for Heat Acclimatization to Prevent Heatstroke
Japanese summers are getting harsher every year, and heatstroke prevention is now essential. In addition to hydration and room temperature management, attention is being paid to "heat acclimatization," which involves getting your body accustomed to the heat before the peak of summer.
Building a body resistant to heat is the foundation for spending a healthy summer. We will deliver methods of heat acclimatization that anyone can easily adopt.
▶Your body becomes less prone to heatstroke when it's accustomed to the heat!
・The human body is not good at responding to sudden heat. Especially in May-June or immediately after the rainy season ends, the body is not yet in "summer mode." By gradually accustoming your body to the heat, you'll sweat more easily and dissipate heat more efficiently from within, transforming into a body resistant to heat.
・Heat acclimatization takes several days to about two weeks, so it's important to start early and continue.
Go for walks, engage in moderate exercise, or sweat in a bath within a reasonable range.
▶Prepare for Summer in the Bath: Bathing Methods to Build a Heat-Resistant Body
In fact, bathing is effective for accustoming your body to heat. Dr. Hayasaka, a medical doctor and leading expert in bathing research, introduces recommended bathing methods.
・Taking a full-body bath in a 40°C hot tub warms your body and makes you gently sweat.
・Continuing this for about two weeks will accelerate the timing of sweating, naturally promoting heat acclimatization.
・Since heatstroke tends to increase around June, it's good to start in May.
Dr. Shin-ya Hayasaka: Professor, Faculty of Engineering and Science, Tokyo City University, Ph.D. in Medicine, Hot Spring Therapy Specialist. Drinking about two glasses of water before and after bathing is also effective. If you are undergoing medical treatment, please consult your doctor about bathing methods.
▶Direct from Gobo-sensei! "Muscle-Up Chair Exercises" You Can Start Today
Daily, small exercises lead to building a body resistant to heat. Why not start easy heat acclimatization exercises you can do while seated, together with Gobo-sensei, who serves as an instructor for the "Heat Acclimatization Start Course" hosted by the Tokyo Metropolitan Government?
▶Learn Heatstroke Prevention Enjoyably! "Heat Acclimatization Start Course"
・The Tokyo Metropolitan Government holds lectures on summer heat countermeasures at various locations in Tokyo as part of its "Zero Heatstroke" project.
・Lectures on heat acclimatization by weather forecasters and exercises by Gobo-sensei are well-received.
・Please apply through the "Tokyo Heatstroke Prevention Portal Site."
Gobo-sensei (Hiroshi Yanase): Exercise instructor for adults. His name comes from "Go" for nursing care (Kaigo) and "Bo" for prevention (Yobo). He has conducted lectures on frailty countermeasures and care prevention for over 100,000 people nationwide. In a survey conducted during last year's event, approximately 99.6% of respondents understood the importance of getting their bodies accustomed to the heat.
▶Others
HTT (Reduce, Create, Store Electricity Daily)
Introducing tips you can start now for summer: "Stay Cool and Save Energy Smartly"
●Aim to "reduce (H)" wasteful electricity consumption without enduring the heat.
●Save money on appliance replacements with "Tokyo Zero Emission Points."
"Tokyo Cool Biz" starting now!
Three Cools: "Working Environment," "Living Environment," "Dressing Environment" - make them cool!
Proposing a new lifestyle with three cool concepts beyond just season and attire.
●May Issue Cover
Thermae Romae Zoku
Mari Yamazaki's smash hit manga. A unique story about an ancient Roman bathhouse architect who gets lost in modern Japanese baths, it has sold over 9 million copies and generated buzz with film and anime adaptations. Since 2024, the sequel "Thermae Romae Zoku," depicting events 20 years later, has been serialized on Shonen Jump+.
Ⓒ Mari Yamazaki/Shueisha
Photo_Hiromichi Nozawa
Mari Yamazaki
【Author's Comment】
During ancient Rome's most prosperous era, it is said that there were nearly 1,000 public baths in urban areas. There is no doubt that the habit of bathing was the foundation of the great Roman Empire. And they knew that bathing was beneficial for health precisely during the "hot" peak of summer. Japan and ancient Rome, though separated by time and place, were both peoples who deeply understood the diverse power of hot water. Following the example of the Romans, I too hope to overcome this summer's heat with morning and evening baths.
X: @THERMARI1
Instagram: @ther
WEB version: https://www.koho.metro.tokyo.jp/
●Special Feature Contents
●Let's Start Before the Heat Intensifies: Practical! Recommendations for Heat Acclimatization to Prevent Heatstroke
Japanese summers are getting harsher every year, and heatstroke prevention is now essential. In addition to hydration and room temperature management, attention is being paid to "heat acclimatization," which involves getting your body accustomed to the heat before the peak of summer.
Building a body resistant to heat is the foundation for spending a healthy summer. We will deliver methods of heat acclimatization that anyone can easily adopt.
▶Your body becomes less prone to heatstroke when it's accustomed to the heat!
・The human body is not good at responding to sudden heat. Especially in May-June or immediately after the rainy season ends, the body is not yet in "summer mode." By gradually accustoming your body to the heat, you'll sweat more easily and dissipate heat more efficiently from within, transforming into a body resistant to heat.
・Heat acclimatization takes several days to about two weeks, so it's important to start early and continue.
Go for walks, engage in moderate exercise, or sweat in a bath within a reasonable range.
▶Prepare for Summer in the Bath: Bathing Methods to Build a Heat-Resistant Body
In fact, bathing is effective for accustoming your body to heat. Dr. Hayasaka, a medical doctor and leading expert in bathing research, introduces recommended bathing methods.
・Taking a full-body bath in a 40°C hot tub warms your body and makes you gently sweat.
・Continuing this for about two weeks will accelerate the timing of sweating, naturally promoting heat acclimatization.
・Since heatstroke tends to increase around June, it's good to start in May.
Dr. Shin-ya Hayasaka: Professor, Faculty of Engineering and Science, Tokyo City University, Ph.D. in Medicine, Hot Spring Therapy Specialist. Drinking about two glasses of water before and after bathing is also effective. If you are undergoing medical treatment, please consult your doctor about bathing methods.
▶Direct from Gobo-sensei! "Muscle-Up Chair Exercises" You Can Start Today
Daily, small exercises lead to building a body resistant to heat. Why not start easy heat acclimatization exercises you can do while seated, together with Gobo-sensei, who serves as an instructor for the "Heat Acclimatization Start Course" hosted by the Tokyo Metropolitan Government?
▶Learn Heatstroke Prevention Enjoyably! "Heat Acclimatization Start Course"
・The Tokyo Metropolitan Government holds lectures on summer heat countermeasures at various locations in Tokyo as part of its "Zero Heatstroke" project.
・Lectures on heat acclimatization by weather forecasters and exercises by Gobo-sensei are well-received.
・Please apply through the "Tokyo Heatstroke Prevention Portal Site."
Gobo-sensei (Hiroshi Yanase): Exercise instructor for adults. His name comes from "Go" for nursing care (Kaigo) and "Bo" for prevention (Yobo). He has conducted lectures on frailty countermeasures and care prevention for over 100,000 people nationwide. In a survey conducted during last year's event, approximately 99.6% of respondents understood the importance of getting their bodies accustomed to the heat.
▶Others
HTT (Reduce, Create, Store Electricity Daily)
Introducing tips you can start now for summer: "Stay Cool and Save Energy Smartly"
●Aim to "reduce (H)" wasteful electricity consumption without enduring the heat.
●Save money on appliance replacements with "Tokyo Zero Emission Points."
"Tokyo Cool Biz" starting now!
Three Cools: "Working Environment," "Living Environment," "Dressing Environment" - make them cool!
Proposing a new lifestyle with three cool concepts beyond just season and attire.
●May Issue Cover
Thermae Romae Zoku
Mari Yamazaki's smash hit manga. A unique story about an ancient Roman bathhouse architect who gets lost in modern Japanese baths, it has sold over 9 million copies and generated buzz with film and anime adaptations. Since 2024, the sequel "Thermae Romae Zoku," depicting events 20 years later, has been serialized on Shonen Jump+.
Ⓒ Mari Yamazaki/Shueisha
Photo_Hiromichi Nozawa
Mari Yamazaki
【Author's Comment】
During ancient Rome's most prosperous era, it is said that there were nearly 1,000 public baths in urban areas. There is no doubt that the habit of bathing was the foundation of the great Roman Empire. And they knew that bathing was beneficial for health precisely during the "hot" peak of summer. Japan and ancient Rome, though separated by time and place, were both peoples who deeply understood the diverse power of hot water. Following the example of the Romans, I too hope to overcome this summer's heat with morning and evening baths.
X: @THERMARI1
Instagram: @ther