Takamatsu, in Kagawa Prefecture, is known as the gateway to Shikoku because of its sea and rail connections to the main island of Honshu. In particular, it is close to the impressive Seto-Ohashi bridge, a colossal structure 13.1 kilometers (8.1 miles) in length. The biggest of its kind in the world, this bridge provides important rail and road connections between the two islands.

Although it was a castle town in the 17th century, Takamatsu is now a modern city. Its seaside castle, a rarity in Japan, no longer exists, but the ruins can still be visited. Ritsurin Koen Garden, while not one of the "big three" Japanese gardens, is still one of the best available and a must-see for visitors. Additionally, Shikoku Mura, and open-air museum where relocated, traditional Shikoku-style architecture can be seen, is another one of the city's popular sights. Nearby Yashima peninsula offers stunning views of the Seto Inland Sea and its many small islands, especially at sunset.