Floor mats in traditional Japanese homes are called Tatami Mats.
In japan, mat is Tatami and we just call it Judo Tatami.
it is called tatami in Japanese =]]
If you are referring to the rice mats they use in the floor, it's tatami (畳)
A Japanese sleeping mat is called a futon. A futon sits upon a woven mat called a tatami. These types of beds have been used for thousands of years of Japanese history.
Japanese straw mats are called ç•³ (tatami) in Japanese. The pronunciation is somewhat like "tah-tah-me".
It is called tatami and is used as a traditional floor covering. Common courtesy (unless stated otherwise) is to remove one's shoes before stepping on one.