The mat used in judo is called a tatami. These mats are specially designed to cushion falls and provide a suitable surface for practice and competition in judo. The tatami is typically made of foam and covered with a durable fabric, ensuring both safety for the athletes and longevity of the equipment. The use of tatami enhances training effectiveness and minimizes the risk of injury during throws and falls, which are common in judo. Proper maintenance and care of the tatami are also crucial for ensuring its functionality during use.