Goshikidai is a plateau which juts into the Seto Inland Sea, located to the West of Takamatsu City. The name "goshiki" means "five colors" and it was so named for the five peaks which are respectively red, yellow, blue, black, and white in color. From this location, visitors can look out over the Seto Inland Sea and the Seto Ohashi bridge, and the Goshikidai Skyline is a great road for a scenic drive. There are a number of facilities on Goshikidai designed to help visitors get the most out of their encounters with the abundant nature on the plateau.
Furthermore, it is said that a great fire that occurred here over one thousand years ago was the cause of the unusual stone, sanukite, to be produced. This stone makes a beautiful tone when struck, and for this reason it is also known as kankan stone. The stone has been made into musical instruments for its beautiful tone, and is loved by musicians and used in concerts worldwide.