One goes under you. One goes over you. Somehow, people still mix them up.

If you’re new to Japanese Futon bedding, the names Shikibuton and Kakebuton can sound like two versions of the same thing. They’re not. In fact, they have completely different jobs.

The simplest way to remember it is:

Shikibuton is what you sleep on. Kakebuton is what you sleep under.

Once you know that, the rest starts to make a lot more sense.

What is a Shikibuton?

A Shikibuton (敷布団) is a traditional Japanese Futon mattress. It forms the bottom layer of your sleeping setup and is designed to be placed directly on the floor, Tatami, or another suitable surface.

Unlike a thick Western mattress, a Shikibuton is relatively low-profile. For example, our Shikibuton is around 5cm thick, with layers of 100% Pure Cotton stitched together to create a sleeping surface that feels soft to the touch while still providing firm support.

That thinner profile is part of the appeal. A Shikibuton can be folded away when you need the floor space for something else, making it especially practical for smaller rooms or flexible living spaces.

Think of it as your sleeping foundation.

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What is a Kakebuton?

A Kakebuton (掛布団) is the opposite. Rather than sleeping on it, you sleep under it.

In simple terms, a Kakebuton is the Japanese equivalent of a comforter or duvet. It sits over your body to provide warmth and comfort while you sleep.

Our Kakebuton is made with 100% Pure Cotton and measures approximately 210cm × 150cm, giving it plenty of coverage over the sleeper. Its cotton construction is designed to provide warmth while remaining breathable, which is particularly useful in warmer climates.

So if the Shikibuton is the part supporting you from underneath, the Kakebuton is the layer creating that cosy little sleep bubble on top.

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Shikibuton vs Kakebuton: The Key Differences

The difference becomes pretty obvious when you put them side by side.

The important thing is that thickness does not automatically mean comfort. The two pieces are designed for completely different kinds of comfort.

A Shikibuton needs enough structure to support your body. A Kakebuton needs to be soft and flexible enough to drape naturally over you.

Why Do You Need Both?

Because they solve two different problems.

Your Shikibuton gives you a place to sleep. Your Kakebuton helps you stay comfortable while you sleep.

Used together, they form a traditional Japanese Futon bedding setup: a supportive mattress underneath and a breathable comforter on top.

And this is where Japanese Futon bedding gets particularly interesting. Instead of one large, permanent bed taking up the same amount of space every day, the individual pieces can be aired, folded and stored when they are not being used.

It’s a pretty simple idea, but a clever one: your bedroom does not always have to be a bedroom.

What About Size?

There is also a practical difference in proportions.

A Shikibuton is generally narrower because it is designed to support your body. Our Single Shikibuton measures approximately 200cm long × 100cm wide × 5cm high.

A Kakebuton is wider so that it can comfortably cover the sleeper. Our Kakebuton measures approximately 210cm × 150cm × 1cm.

This is why you should not assume that the Shikibuton and Kakebuton need to have exactly the same dimensions. They are designed to work together, but they perform different jobs.

So, Which One Should You Get?

If you’re looking for a Japanese Futon mattress, you’re looking for a Shikibuton.

If you’re looking for a Japanese comforter or blanket to keep you warm at night, you’re looking for a Kakebuton.

And if you want the full Japanese Futon experience, the two work best as a pair. One supports you from underneath. The other keeps you cosy on top.

Not quite as complicated as the names make it sound.