Notes on ordering tatami mats with tatami edges (tatami heri) in custom sizes

The Tatami mats we offer come in two types: those without tatami edges (tatami-mori) and those with tatami edges (tatami-beri), which are often used in ordinary Japanese-style rooms.
You can choose according to your visual preference, but in terms of the strength of the edges, the ones with tatami-beri have an advantage.

Please note that there are some points to keep in mind when ordering tatami with tatami edges in custom sizes.

We hope this article will help you select the tatami mats you need.

Notes on attaching tatami mat edges

What should you pay attention to when attaching tatami mat edges?

Tatami mat edges are fabrics sewn onto tatami to reinforce them, reduce gaps, and sometimes provide a decorative function.
They come in various colors, patterns, and materials, and are generally sewn about 30 mm from the edge of the tatami surface.

The thickness of tatami is limited to 30 mm when covering the sides with tatami edges

The width of the tatami edge material is approximately 80 mm, and the part on the tatami surface is sewn with the edge folded in.
If you want the tatami edge to cover the sides, the tatami can be finished neatly as long as its thickness is 30 mm or less.

If the thickness is 30 mm or less, the seams are generally not visible from the sides.
The back of the tatami is covered with a non-woven fabric to prevent slipping.

When the thickness of tatami exceeds 30 mm

When tatami is made thicker than 30 mm, the tatami edge cannot cover the entire side, and part of the core material becomes visible.

As you can see in the photo, the seams and core material are exposed on the sides of the tatami.
This does not affect functionality, but the appearance is not ideal.
If the sides are hidden by wooden frames, this is not an issue. However, if the tatami is used directly on the floor, we recommend keeping the thickness at 30 mm or less.

Does the thickness of the tatami make a difference?

Whether the tatami is 30 mm or 50 mm thick does not affect sleeping or sitting comfort.
Thicker tatami provides better heat and sound insulation, however.