They are called mecha in Japanese. Mechs often appear in anime, science fiction, and other genres involving fantastic or futuristic elements. Mechs are generally, though not necessarily, bipedal and are best described as a mix between a tank and a robot. Some mechs have arms, hands, and fingers capable of grasping objects. A mech that approximates the shape of a human body may allow the use of martial arts movements and swordsmanship, ceremonial acts of honor, saluting, and other human mannerisms.