
Choosing the right tatami mat size can be overwhelming, especially with the many options available. There are various sizes to choose from, including standard sizes like 1.8m x 2m, 1.8m x 3m, and 2m x 3m, as well as custom sizes to fit unique spaces.
For a typical tatami room, a 1.8m x 2m mat is a popular choice. This size is ideal for small to medium-sized rooms and can be easily placed in a corner or against a wall.
In terms of dimensions, tatami mats come in a range of sizes, from 1.2m x 1.8m to 2.4m x 4m. The most common sizes are 1.8m x 2m, 1.8m x 3m, and 2m x 3m.
The right size for you will depend on the available space and your personal preference.
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Tatami Mat Sizes
Tatami mat sizes vary greatly depending on the type and intended use.
The traditional Japanese tatami has dimensions of 180x90 cm. Traditional Tatami mats are fundamental to preserving the authenticity of martial arts.
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There are also larger and thinner judo tatami mats, measuring 200x100 cm with a thickness of 4 cm. Judo tatami mats are designed for martial arts training.
For a more compact space, the Danchi-ma tatami mat is used in public housing, measuring 170 cm by 85 cm. This size can be used to calculate the total room size, such as a 6-tatami room.
Here's a comparison of some common tatami mat sizes:
It's worth noting that the thickness of tatami mats can also vary, with some being as thin as 2 cm, like the Tatami Karate mat.
Comparison and Layout
A 6-tatami room is sufficient for a single person, as explained in the article section. This size is ideal for a small, cozy space.
To give you a better idea, a 6-tatami room is similar in size to a 6-tatami 1K, which is a specific type of tatami room.
In fact, the main difference between a 6-tatami one-room and a 6-tatami 1K is the layout, not the size.
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Kyo Ma

Kyo Ma is the largest tatami size used in Japan, specifically in the Kansai, Chugoku, Shikoku, and Kyushu regions. One tatami mat measures 191 cm by 95.5 cm, which equals 1.82 square meters.
A 6-tatami room with Kyo Ma mats is 10.94 square meters, making it a spacious option for larger living areas. This size is ideal for traditional Japanese homes where extra space is often valued.
One of the benefits of Kyo Ma is its ability to create a sense of openness and airiness in a room, thanks to its larger size. This is particularly noticeable in areas with high ceilings or large windows.
Kyo Ma is commonly used in traditional Japanese architecture, where the emphasis is on creating a harmonious balance between space and simplicity.
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One-Room vs 1K Despite Both Being 6
A 6-tatami room is sufficient for a single person, but the layout can make a big difference.
Even if both rooms are 6 tatami, there's a difference between a one-room and a 1K layout.
The coverage area of a 6-tatami room varies significantly between 1K and 1R layouts.
One-room layouts often have a more compact design, which can make the room feel smaller, whereas 1K layouts typically have a more open floor plan, making the room feel larger.
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Room Size Options
Traditional tatami mats are typically 180x90 cm in size, but there are variations depending on the martial art. A judo tatami, for example, measures 200x100 cm.
For a 6-tatami room, the total area is 1080 square centimeters. This size can be sufficient for a single person, but it ultimately depends on personal preference and the specific martial art being practiced.
Here are some common room size options for different martial arts:
Danchi Ma Size
A 6-tatami room with Danchi-ma mats is 8.67 square meters.
One tatami mat measures 170 cm by 85 cm.
Danchi-ma mats are used mainly in public housing.
One tatami mat equals 1.45 square meters.
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One-Room vs. 61K 1K
A 6-tatami room is often considered sufficient for a single person, but it's essential to consider the differences between a 6-tatami one-room and a 6-tatami 1K.
In Japan, the size of a room is often determined by the number of tatami mats it can fit, with a tatami mat measuring about 1.8 meters by 2 meters.

A 6-tatami room is relatively small, and you'll need to prioritize your belongings and living space to make the most of it.
Considering the size of a 6-tatami room, it's likely that a single person will have enough space for a bed, a desk, and some storage, but it may be challenging to fit a separate living area.
If you're considering a 6-tatami 1K, it's worth noting that this type of room is usually slightly larger than a 6-tatami one-room, but the difference may not be significant enough to make a big impact on your daily life.
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Benefits of 6 Room Choice
Choosing a 6-room layout can be a great option for those looking to save on utility costs. This is because the smaller living space makes air conditioning more efficient, which can lead to lower utility bills.
A 6-room layout also offers more flexibility in terms of furniture arrangement, allowing you to create a more open and airy feel in your home. This can be especially beneficial in smaller spaces where clutter can quickly accumulate.
By choosing a 6-room layout, you can take advantage of the benefits of a smaller living space, including lower utility costs and a more flexible floor plan.
Furniture and Layout
A 6-tatami room can be a challenge when it comes to placing a three-seater sofa, which is generally difficult.
Placing a desk in a 6-tatami room requires careful planning.
A common layout for 1K rooms involves placing the TV and desk along one wall, creating a clear view to the balcony upon entering the room.
This layout makes the space feel larger and more organized.
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Limited Furniture Arrangement
In a 6-tatami room, placing a three-seater sofa is generally difficult.
Placing a desk can be a challenge and requires careful planning.
A common layout for 1K rooms involves placing the TV and desk along one wall.
This arrangement allows a clear view straight to the balcony upon entering the room, making the space feel larger.
For an organized look, place the dresser or workspace along the long wall.
By keeping the furniture arranged in a thoughtful way, you can make even the smallest rooms feel more spacious.
Fit Sofa in 6-Room with Ingenuity

Fitting a sofa in a 6-tatami room requires some creativity.
A 1.5-seater sofa can fit in a 6-tatami room with careful planning.
Positioning the bed along the shorter side of the room is key to ensuring access to the balcony.
A single bed is preferable to a double bed, as it makes it easier to fit a sofa in the room.
Measure the sizes of both the bed and sofa carefully before viewing the property.
Be aware that rooms often have beams in the corners, especially in reinforced concrete buildings, which can obstruct balcony access if a bed is placed there.
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Alternative Sizes
Tatami mats come in various sizes, but some martial arts disciplines have specific requirements.
The traditional Japanese tatami has dimensions of 180x90 cm, while judo tatami measures 200x100 cm.
If you're looking for a smaller tatami, the Karate tatami is a good option, measuring 180x90 cm with a thickness of 2 cm.
Some martial arts, like Aikido, use the same size as judo tatami, which is 200x100 cm with a thickness of 4 cm.
Here's a list of alternative tatami sizes for different martial arts:
Measurement Systems
Japan has its own unique measuring system for space, especially when it comes to tatami mats. The standard room size in Japan is a 6-mat room, or "roku-jo no heya" in Japanese.
A tatami mat is approximately 1.8 meters x 0.9 meters in size, but in cities like Tokyo, they're slightly smaller, measuring 1.76 meters x 0.88 meters.
To give you a better idea of the size of a tatami mat, here's a table showing the equivalent square meters and square feet for different jo sizes:
In Japan, the overall size of a house or apartment is often expressed in square meters or "tsubo". Historically, 2-jo is equivalent to 1 tsubo.
Frequently Asked Questions
How big is a 6 tatami mat room?
A 6 tatami mat room is approximately 9.72 square meters in size. This is equivalent to a room with a floor area of about 1.62 square meters per mat.
How big is an 8 tatami mat room?
An 8 tatami mat room is approximately 12.4 square meters or 133.4 square feet in size. This spacious room features a veranda-like porch, lavatory, and washstand.
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