Casio was founded in Tokyo, Japan, in 1946 by Tadao Kashio. The company initially focused on manufacturing electronic calculators. In year 1974, Casio was introduced the world’s first digital watch – CASIOTRON. The watch was innovative and trendy, with digital display showing hours, minutes, and seconds, in addition to an entirely original feature: a fully automatic calendar function. It has made Casio digital watches popular with a wide range of consumers, from professionals to students to outdoor enthusiasts.