“Why American Rooms Feel Freezing: A Japan–U.S. Temperature Culture Clash”

ByYumi

If you’ve ever walked into an American supermarket, movie theater, or restaurant in summer and thought, “Why is it like a fridge in here?!”, you’re not alone.
Many Japanese people feel that Americans must be incredibly “hot-natured” because indoor spaces in the U.S. can feel shockingly cold compared to Japan.

But is it really that Americans are hotter and Japanese are colder?
Or is something else going on behind this big temperature gap?

This article looks at how Japanese and Americans think about air-conditioning, comfort, and “the right” indoor temperature—and why so many Japanese people dislike over-cooling while many Americans don’t even notice it.

Different numbers on the thermostat

First, let’s look at the typical temperature settings in each country.

In Japan, the government’s Cool Biz campaign encourages offices to set the air conditioner to around 28°C to save energy and reduce CO₂ emissions.
Many households also aim for about 26–28°C in summer, especially when people are trying to conserve energy or follow environmental recommendations.

In the United States, the picture is quite different.
Surveys and energy guides show:

  • Many American homes keep summer indoor temperatures around 71–75°F (about 22–24°C) when people are at home.
  • The U.S. Department of Energy suggests 78°F (about 25.5–26°C) as an energy-saving setting, but lots of people feel that is already “too warm” and prefer it cooler.

In other words:

  • Japan: “Let’s keep it around 26–28°C so we don’t overcool and waste electricity.”
  • U.S.: “Comfort is around 22–24°C… 26°C is getting a bit warm.”

For someone used to 27–28°C in Japan, stepping into a 22–23°C American store in summer can feel like entering a giant refrigerator.

Climate, buildings, and machines: the “hardware” side

The difference isn’t only cultural. The hardware of daily life is also different.

Central AC vs. room units

  • United States:
    Many homes, offices, schools, and stores have central air-conditioning. One powerful system cools the entire building through ducts. The temperature is usually controlled by one thermostat, often set by building managers or store owners. It can easily make every room quite chilly.
  • Japan:
    Most homes use individual wall-mounted AC units in each room. You can turn one room on, one room off, or set different temperatures. This makes it easier to “cool just a little” or adjust based on who is in the room.

Because American central AC cools large spaces very quickly, stores and offices often set the temperature lower “just to be safe.” The result: extremely cold supermarkets, offices, and movie theaters.

Insulation and building style

American houses, especially in colder regions, are often built with strong insulation to keep heat or cool air inside. That means once a room gets cold, it stays cold.

Japanese houses, especially older ones, often have weaker insulation. Even if you set the air conditioner to 26–28°C, the actual feeling can be a bit warmer because outside heat leaks in. This is one reason why Japanese people often talk about “saving energy” and “not overcooling” — the system must work hard to keep a low temperature, so people accept a slightly warmer room.

Culture and comfort

Temperature is not just physics; it’s also culture.

Japan: Avoid overcooling and take care of your body

In Japan, many people worry about:

  • Getting stiff shoulders or back pain from cold air
  • hieshō – a tendency to feel cold easily, especially in hands and feet
  • Catching a summer cold from sleeping in strong AC

Because of this, a lot of Japanese people prefer:

  • Gradual, gentle cooling
  • Temperatures that are not “icy” but just “a bit cooler than outside”
  • Using fans, opening windows in the evening, and combining AC with other methods

The idea of “not cooling too much” is seen as caring for your health and your body. For many Japanese people, feeling a little warm is acceptable, but feeling chilled indoors is uncomfortable and even unhealthy.

U.S.: Comfort first, don’t sweat, and stay productive

In the U.S., comfort is often defined as:

  • Not sweating
  • Being cool enough to work, shop, or study without feeling sticky or sleepy
  • Avoiding heat-related health risks, especially in very hot regions

Many Americans:

  • Don’t mind bringing a hoodie or sweater to wear inside—even in summer.
  • Feel that a cool, crisp indoor temperature helps them stay focused and comfortable.
  • Are used to very strong AC in cars, offices, and stores from a young age.

So while a Japanese person may think, “This is freezing! I’ll get sick!”, an American might think, “Nice, finally I’m not sweating.”

Social rules

There is also a difference in social expectations.

Japan: Don’t bother others

In Japan, people often avoid making requests that might inconvenience others. If you think it’s too cold, you might hesitate to say:

“Excuse me, could we turn down the AC a little?”

You might worry others prefer it cool, or that you are being selfish. It can feel more polite to just endure it quietly.

This can make conference rooms, trains, or classrooms tricky: some people are too hot, others too cold, but no one wants to speak up too strongly.

U.S.: Speak up about your own comfort

In the U.S., it’s more common to say things like:

  • “It’s freezing in here; can we turn the AC up a bit?”
  • “I’m burning up. Can we lower the temperature?”

People are used to openly discussing their personal comfort. Of course, they still compromise, but voicing your needsis more socially acceptable.

At the same time, many workplaces are controlled top-down: the building manager sets a fixed temperature, and employees just bring sweaters. This is why you see American office workers in summer wearing long sleeves indoors while it’s 35°C outside.

So… are Americans really “hot-natured”?

Not exactly.

It’s less about biology and more about:

  • Different baseline numbers (22–24°C vs 26–28°C)
  • Different buildings and machines (central AC vs room units)
  • Different health beliefs (overcooling vs overheating)
  • Different social habits (gaman vs speaking up and layering clothes)

Americans are not necessarily hotter; they are just used to cooler indoor environments and define “comfortable” differently.

Practical tips for Japanese people in the U.S. (and vice versa)

If you’re Japanese and living or traveling in the U.S.:

  • Always carry a light cardigan or hoodie in summer.
  • Don’t hesitate to say politely:“Would you mind turning the AC up just a little? It feels a bit cold for me.”
  • If you control the thermostat at home, explain to your American family or roommates that overcooling makes you feel unwell, and suggest a compromise temperature (for example, 24–25°C instead of 22°C).

If you’re American in Japan:

  • Be prepared for warmer indoor temperatures, especially in public buildings.
  • Try to understand that many Japanese people see “not overcooling” as considerate and healthy, not as “suffering on purpose.”
  • Use fans, cooling towels, or breathable clothing to stay comfortable at 26–28°C.

Conclusion

The question “Are Americans hot-natured?” actually hides a deeper cultural story.
What feels “too cold” or “too hot” depends not only on the thermometer, but also on energy policy, building design, health beliefs, and everyday manners.

For many Japanese people, strong AC = overcooling = unhealthy.
For many Americans, strong AC = comfort = normal.

Understanding these differences doesn’t instantly make the American office feel less like a refrigerator—but it can help us laugh about it, talk about it, and maybe find a temperature that works for everyone.

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