Tatami.
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 畳 (tatami) in Japanese. The pronunciation is somewhat like "tah-tah-me".
Floor mats in traditional Japanese homes are called Tatami Mats.
If you are referring to the rice mats they use in the floor, it's tatami (畳)
It is referred to as a bamboo sushi mat. They are typically wrapped in plastic for sanitary reasons. They help the sushi chef form a nice round roll for the presentation, but they can use it to make different shapes such as tear drops. You can buy them online at: http://www.homesushibar.com/kitchen-knives-tools/sushi-tools/
In Japanese It Is Kingu , It Is Called Romaji When Written in English
tatami
In japan, mat is Tatami and we just call it Judo Tatami.
The English word for "banig" is mat or sleeping mat.
A Japanese floor mat is called a tatami. It is made from woven straw and is often used as flooring in traditional Japanese homes. Tatami mats are known for their natural and organic feel, as well as their soft cushioning underfoot.
They are called 'waishattsu' in Japanese, written: ワイシャツ