Casio Rival is a brand of watches that competes with other watch brands such as Sanyo, Seiko, and Timex. Sanyo is a Japanese electronics company that produces a variety of consumer electronics, including watches. Seiko is another Japanese watchmaker that produces luxury watches. Timex is an American watchmaker that produces watches for both fashion and sports. All three of these companies are competitors of Casio Rival in the watchmaking industry.