The term Japanese Straw Mat is often referred to as 'Tatami' in Japanese. Tatami mats are traditional flooring materials made from woven straw and rush grass, and are commonly used in Japanese homes and temples. They are usually rectangular in shape and measure about 90 cm by 180 cm. Tatami mats are known for their softness and durability, and are often used as a decorative element in Japanese interior design.