It is made by knitting rush and straw.
Tatami was indispensable for a long time in the Japanese house.
Because,climate of Japan is humid,cold winter with hot summer.
Tatami have the effect insulation and humidity control.Furthermore, it has soundproof effect, also air cleaning effect.
The Japanese-style room with a tatami is called 和室（Washitu）.
和 means Japan. 室 means room.
In Washitsu, we sleep in spread bedclothes directly on the tatami.
In recent years, a house with a Washitsu has been reduced.
However, we are rediscovering the goodness of the Tatami.
For example,warmth of Tatami, interior elements of Japanese tradition, and the safety of natural materials.
Also, it is popular that a highly design Tatami.
Washitsu has been reduced nevertheless, many Japanese residential has Tatami yet.
In eateries that mainly provides Japanese cooking, always have tatami .
And mat used by the judo was tatami formerly.Judo mat now are made of plastic.
There is a carpet called Goza that is similar to tatami.
When summer coming,we lay Goza to no Tatami room in order to make a sense of cool.
This is devise to overcome the hot Japanese summer.
I should say at the end.On the tatami, do not wear shoes or slippers.Please be careful.
