Casio Casio is a multinational consumer electronics company known not only for its keyboards and music tech, but also for its watches, calculators, and so on. When it comes to music, the company is best known for its keyboard range. Average User Rating 0 0 votes Please sign in to rate. Your Rating 0 Contact Phone Number: +1 (800) 706-2534 Headquarters: Shibuya, Tokyo, Japan Email: Contact form Online: History History coming soon!