Have you ever been sitting at your desk, staring at your computer, when someone suddenly says:

「猫背になってるよ！」

Nekoze ni natteru yo!

"You're sitting like a cat!"

Wait. WHAT?! 🐱😂

A cat?

You're not meowing.

You're not licking your paws.

And you're definitely not sleeping 16 hours a day.

So why would someone call you a cat?

Well, in Japan, there's a word for rounded, hunched-over posture.

猫背 (Nekoze).

And it literally means...

"Cat's back."

Yes. Japanese people looked at a cat's curved back and thought:

"That's exactly what humans look like when they slouch!"

But here's the funny part.

Cats are famous for their flexibility and graceful movements.

So how did they become the symbol of bad posture?

Let's discover the surprisingly relatable Japanese expression nekoze.

What Does Nekoze (猫背) Mean?

The Japanese word 猫背 (ねこぜ / nekoze) combines two kanji:

• 猫 (Neko) — Cat
• 背 (Se) — Back

Together, they mean "cat's back."

In everyday Japanese, nekoze describes a posture where the upper back is noticeably rounded and the shoulders tend to curve forward.

Imagine someone sitting at a desk.

Their head is leaning toward the screen.

Their shoulders are rounded.

Their back forms a gentle curve.

That's nekoze.

In English, we might say:

"You're slouching."

"You have rounded shoulders."

"You're hunched over."

But Japanese?

"You have a cat's back." 🐱

Much more imaginative, don't you think?

Why Is It Called a Cat's Back?

Have you ever watched a cat stretch?

One moment, it's lying comfortably on the floor.

The next moment...

Its back rises into a beautiful arch.

Its head drops.

Its shoulders shift.

And suddenly, it looks like a tiny furry bridge.

Cats naturally curve and stretch their spines in ways that are easy to recognize.

This distinctive rounded shape is the inspiration behind nekoze.

When a person's upper back becomes rounded, the silhouette can resemble a cat's arched back.

And that's how the expression makes sense.

But there's an important difference.

A cat's curved back is not necessarily bad posture.

Cats have remarkably flexible spines.

They naturally arch their backs while stretching, playing, or responding to their surroundings.

Humans, on the other hand, may develop a habit of sitting or standing with their upper backs rounded.

So while the expression is inspired by cats, it's really describing a human posture.

Poor cats.

They didn't ask to become the international symbol of slouching. 😂

Is Nekoze a Common Japanese Word?

Yes!

Nekoze is a familiar word in everyday Japanese.

You might hear it at home, at school, in the workplace, or during a conversation about posture.

For example:

猫背だね。

Nekoze da ne.

"You're slouching."

猫背を直したい。

Nekoze o naoshitai.

"I want to improve my posture."

猫背にならないように気をつけて。

Nekoze ni naranai yō ni ki o tsukete.

"Be careful not to slouch."

パソコンを使っていると猫背になる。

Pasokon o tsukatte iru to nekoze ni naru.

"I tend to slouch when I'm using a computer."

Sound familiar?

Especially that last one.

Modern technology has given us countless opportunities to become professional nekoze experts.

Computers.

Smartphones.

Tablets.

Video games.

Even reading a really interesting book.

Our poor shoulders are constantly being pulled toward something.

What Does Nekoze Look Like?

Imagine three people sitting at a café.

Person A:

Sitting upright.

Shoulders relaxed.

Looking straight ahead.

Person B:

Leaning forward slightly to read a menu.

Nothing particularly unusual.

Person C:

Head pushed forward.

Shoulders rounded.

Upper back curved.

Completely absorbed in their phone.

Person C is showing the posture commonly described as nekoze.

But here's something important.

Nekoze is a descriptive everyday word, not a medical diagnosis.

A rounded back can result from different factors, including habitual positioning and the natural shape of someone's spine.

Not everyone with a rounded upper back has a problem that needs correcting.

And temporarily sitting in a slouched position isn't automatically harmful.

The Japanese expression simply gives a recognizable name to the shape.

The Modern Nekoze Problem: Smartphones and Computers

Imagine this.

You wake up.

Check your phone.

Eat breakfast while checking your phone.

Sit at your computer.

Work for eight hours.

Go home.

Watch videos on your phone.

And finally...

Lie in bed.

Checking your phone.

Again.

Your cat watches from the sofa.

Judging you.

Probably. 🐱

Modern life encourages people to spend long periods looking downward or leaning toward screens.

This can make rounded-shoulder and forward-head postures more noticeable.

In Japan, discussions about posture often mention nekoze, particularly in relation to desk work and smartphone use.

You may also encounter another expression:

スマホ首 (Sumaho Kubi)

Literally, "smartphone neck."

This is an informal term used to describe neck-posture concerns associated with smartphone use.

It's related to nekoze, but the two expressions aren't identical.

Nekoze focuses on the rounded back.

Sumaho kubi focuses on the neck.

Together?

They sound like the official posture of the modern internet generation.

Is Nekoze Considered Bad in Japan?

Generally, nekoze has a negative association because it describes slouching or a noticeably rounded posture.

In Japan, as in many cultures, upright posture is often associated with attentiveness, confidence, and good manners.

You may hear parents reminding children:

「姿勢を正して！」

Shisei o tadashite!

"Sit up straight!"

Or:

「背筋を伸ばして！」

Ses uji o nobashite!

"Straighten your back!"

The second expression is written 背筋を伸ばして (Ses uji o nobashite), and is naturally pronounced sesuji o nobashite.

These reminders can appear in everyday situations.

During meals.

While studying.

When meeting someone.

Or while sitting in a formal setting.

However, the expectation depends on the situation, and Japanese people have different attitudes toward posture just like people everywhere else.

There's no single posture rule that everyone follows.

Does Nekoze Affect How People Are Perceived?

Sometimes.

Posture can influence first impressions in Japan, just as it can elsewhere.

Someone sitting upright may appear attentive or confident.

Someone with noticeably rounded shoulders might be perceived as tired, shy, or less engaged.

But these are impressions, not reliable indicators of someone's personality.

A person who slouches isn't necessarily lazy.

And someone sitting perfectly upright isn't automatically hardworking.

Still, the cultural association between posture and presentation helps explain why nekoze comes up in everyday conversations.

It's not only about the shape of your back.

Sometimes, it's also about how you appear to others.

Is Nekoze the Same as Kyphosis?

Not exactly.

This is an important distinction.

Nekoze (猫背) is an everyday Japanese expression for a rounded or hunched upper-back posture.

Kyphosis is a medical term describing the normal outward curvature of the thoracic spine.

Everyone has some degree of thoracic kyphosis.

An excessively pronounced curve may be described medically as hyperkyphosis.

The two concepts can overlap visually, but they aren't interchangeable.

Someone might be described as having nekoze because of how they habitually sit.

That doesn't necessarily mean they have a structural spinal condition.

And a person's posture can't be accurately diagnosed just by looking at them.

If someone has persistent pain, significant changes in spinal shape, or concerns about their posture, a qualified healthcare professional can help evaluate the cause.

How Do Japanese People Talk About Improving Nekoze?

You might hear expressions such as:

猫背を改善する (Nekoze o Kaizen Suru)

"To improve rounded posture."

猫背を直す (Nekoze o Naosu)

"To correct slouching."

姿勢をよくする (Shisei o Yoku Suru)

"To improve posture."

背筋を伸ばす (Sesuji o Nobasu)

"To straighten your back."

These expressions appear in conversations about exercise, stretching, ergonomics, and everyday habits.

But there's a common misconception worth addressing.

Good posture doesn't mean forcing your spine to remain perfectly straight all day.

The human spine naturally has curves.

And remaining in any single position for a long time can become uncomfortable.

Comfortable movement, changing positions, and having a workstation that suits your body are generally more useful goals than trying to hold one supposedly perfect posture.

Your back doesn't need to become a rigid wooden board.

Even cats know the importance of moving around.

Cats Have Better Posture Habits Than We Think

Here's something ironic.

We use cats to describe bad posture.

But cats are constantly changing positions.

They stretch.

They twist.

They curl into tiny balls.

They arch their backs.

They stretch again.

And then...

They sleep.

For a very long time.

A cat's rounded back is part of its natural movement.

It's not necessarily a sign that something is wrong.

Humans also benefit from being able to move comfortably through different positions.

So perhaps the lesson isn't:

"Never sit like a cat."

Maybe it's:

"Don't forget to move like a cat."

Stretch.

Change positions.

Take a break.

And perhaps enjoy a nap.

Although your boss might have opinions about that last suggestion. 😂

Why Does Japanese Use Animals to Describe People?

Animal expressions aren't unique to Japan.

English has plenty.

"Busy as a bee."

"Stubborn as a mule."

"Let the cat out of the bag."

"Hold your horses."

Animals provide familiar images that make abstract ideas easier to understand.

Japanese does the same thing.

But the specific comparisons can be wonderfully different.

Instead of simply saying someone is slouching, Japanese describes the shape of a cat's back.

Instead of saying someone can't tolerate hot food, Japanese calls them a cat's tongue.

And instead of saying someone is extremely busy, Japanese imagines borrowing a cat's paw.

These expressions are memorable because they turn ordinary situations into little pictures.

You don't just learn a new word.

You get a tiny story.

And sometimes, a very confused cat.

Frequently Asked Questions

What does Nekoze (猫背) mean in Japanese?

Nekoze literally means "cat's back." It describes rounded or hunched upper-back posture, commonly referred to as slouching in English.

How do you pronounce Nekoze?

It's pronounced neh-koh-zeh.

The Japanese spelling is ねこぜ, and the kanji is 猫背.

Why is bad posture called a cat's back in Japanese?

The expression comes from the resemblance between a person's rounded upper back and the curved shape of a cat's back.

Is Nekoze a common word in Japan?

Yes. It's a familiar everyday expression used when discussing slouching, rounded shoulders, and posture.

Is Nekoze considered rude?

The word itself isn't rude. However, directly commenting on someone's posture may feel critical depending on the relationship and situation.

Is Nekoze a medical condition?

No. Nekoze is an everyday descriptive term, not a specific medical diagnosis.

What's the difference between Nekoze and Sumaho Kubi?

Nekoze describes a rounded upper back, while sumaho kubi ("smartphone neck") refers informally to neck-posture concerns associated with smartphone use.

How do you tell someone to sit up straight in Japanese?

You can say:

背筋を伸ばして！

Sesuji o nobashite!

"Straighten your back!"

Or:

姿勢を正して！

Shisei o tadashite!

"Sit up straight!"

What does Neko mean in Japanese?

猫 (Neko) means "cat."

It's one of the most recognizable Japanese animal words.

What are other Japanese expressions using cats?

Popular examples include nekojita (cat's tongue), neko o kaburu (wear a cat), neko ni koban (gold coins to a cat), and neko no te mo karitai (borrow a cat's paw).

🇯🇵 Keep Discovering Japan

Why stop at one cat expression? Discover Japanese Expressions Using Cats (猫のことわざ・慣用句) and explore 15 funny sayings that reveal Japan's wonderfully imaginative relationship with cats.

👋 Meet a JapPop Resident

Salary Meow 

Salary Meow has an important job.

Very important.

At least, that's what he tells everyone.

Every morning, he arrives at the office.

Coffee in hand.

Laptop open.

Ready to conquer the corporate world.

9:00 AM.

Perfect posture.

10:30 AM.

Slightly leaning forward.

1:00 PM.

Shoulders rounded.

3:00 PM.

Completely folded over his keyboard.

His coworker looks over.

"Salary Meow, you're becoming nekoze."

Salary Meow slowly raises his head.

"I'm not slouching. I'm getting closer to my deadlines." ☕🐱

He straightens his back.

Takes another sip of coffee.

And returns to work.

Five minutes later...

Nekoze again.

Some habits are harder to break than the Monday morning coffee routine.

👉 Meet Salary Meow and discover more residents from the JapPop Universe.

🇯🇵 About JapPop

At JapPop, we celebrate Japanese culture through playful illustrations, original characters, and stories inspired by everyday life in Japan.

From traditional festivals and Japanese food to unusual expressions and everyday customs, we explore the little details that make Japan so fascinating.

Nekoze is a perfect example.

A simple word for slouching becomes a funny mental picture of a cat's curved back.

And suddenly, learning Japanese feels a little more memorable.

So next time you catch yourself leaning toward your computer, remember:

You might have a case of nekoze.

And somewhere, a cat is probably judging your posture.

From an equally ridiculous sleeping position. 🐱😂

Discover Japan, one story at a time. 🇯🇵✨